./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH --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 eed2e8df987302e7b4776cd78a5dfa18f2ec05bebbebf3053d8131bf9a8de623 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:40:44,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:40:44,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:40:44,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:40:44,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:40:44,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:40:44,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:40:44,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:40:44,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:40:44,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:40:44,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:40:44,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:40:44,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:40:44,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:40:44,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:40:44,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:40:44,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:40:44,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:40:44,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:40:44,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:40:44,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:40:44,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:40:44,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:40:44,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:40:44,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:40:44,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:40:44,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:40:44,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:40:44,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:40:44,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:40:44,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:40:44,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:40:44,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:40:44,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:40:44,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:40:44,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:40:44,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:40:44,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:40:44,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:40:44,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:40:44,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:40:44,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:40:44,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:40:44,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:40:44,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:40:44,751 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:40:44,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:40:44,752 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:40:44,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:40:44,753 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:40:44,757 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:40:44,757 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:40:44,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:40:44,759 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:40:44,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:40:44,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:40:44,760 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:40:44,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:40:44,761 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:40:44,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:40:44,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:40:44,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:40:44,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:40:44,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:40:44,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:40:44,763 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:40:44,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:40:44,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:40:44,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:40:44,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:40:44,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:40:44,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:40:44,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:44,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:40:44,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:40:44,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:40:44,768 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:40:44,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:40:44,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:40:44,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:40:44,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:40:44,769 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_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eed2e8df987302e7b4776cd78a5dfa18f2ec05bebbebf3053d8131bf9a8de623 [2021-11-03 03:40:45,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:45,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:45,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:45,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:45,184 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:45,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-03 03:40:45,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/d45a87df9/f8c51379eb8c42e989dc1d11ef3231b3/FLAG733623dc0 [2021-11-03 03:40:45,778 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:45,779 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-03 03:40:45,787 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/d45a87df9/f8c51379eb8c42e989dc1d11ef3231b3/FLAG733623dc0 [2021-11-03 03:40:46,144 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/d45a87df9/f8c51379eb8c42e989dc1d11ef3231b3 [2021-11-03 03:40:46,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:46,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:46,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:46,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:46,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:46,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c93b408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46, skipping insertion in model container [2021-11-03 03:40:46,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:46,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:46,388 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_1e761c69-a473-4f4b-b007-a796b1e6cea5/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2021-11-03 03:40:46,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:46,436 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:40:46,451 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_1e761c69-a473-4f4b-b007-a796b1e6cea5/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2021-11-03 03:40:46,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:46,470 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:40:46,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46 WrapperNode [2021-11-03 03:40:46,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:46,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:46,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:40:46,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:40:46,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:46,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:40:46,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:40:46,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:40:46,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:40:46,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:40:46,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:40:46,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:40:46,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (1/1) ... [2021-11-03 03:40:46,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:46,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:46,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:40:46,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:40:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:40:46,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:40:46,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:40:46,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:40:47,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:40:47,034 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 03:40:47,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:47 BoogieIcfgContainer [2021-11-03 03:40:47,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:40:47,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:40:47,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:40:47,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:40:47,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:46" (1/3) ... [2021-11-03 03:40:47,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7843c702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:47, skipping insertion in model container [2021-11-03 03:40:47,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:46" (2/3) ... [2021-11-03 03:40:47,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7843c702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:47, skipping insertion in model container [2021-11-03 03:40:47,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:47" (3/3) ... [2021-11-03 03:40:47,047 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-03 03:40:47,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:40:47,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:40:47,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:40:47,131 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 [2021-11-03 03:40:47,131 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:40:47,146 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) [2021-11-03 03:40:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 03:40:47,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:47,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 03:40:47,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2098665, now seen corresponding path program 1 times [2021-11-03 03:40:47,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:47,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830465855] [2021-11-03 03:40:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:47,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:47,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:47,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830465855] [2021-11-03 03:40:47,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830465855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:47,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:47,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 03:40:47,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414468128] [2021-11-03 03:40:47,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:40:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:40:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:40:47,396 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) [2021-11-03 03:40:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:47,421 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 03:40:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:40:47,424 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 [2021-11-03 03:40:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:47,433 INFO L225 Difference]: With dead ends: 13 [2021-11-03 03:40:47,433 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 03:40:47,436 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 [2021-11-03 03:40:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 03:40:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 03:40:47,470 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) [2021-11-03 03:40:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 03:40:47,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 03:40:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:47,473 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 03:40:47,474 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) [2021-11-03 03:40:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 03:40:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:40:47,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:47,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:40:47,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:40:47,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash 65017257, now seen corresponding path program 1 times [2021-11-03 03:40:47,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:47,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060585639] [2021-11-03 03:40:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:47,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:47,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060585639] [2021-11-03 03:40:47,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060585639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:40:47,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467553823] [2021-11-03 03:40:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:47,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:40:47,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:47,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:40:47,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:40:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:40:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:47,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467553823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:40:47,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177484194] [2021-11-03 03:40:47,938 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:40:47,938 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:40:47,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:40:47,956 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:40:47,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:40:48,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,015 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:40:48,020 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:40:48,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 03:40:48,066 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 03:40:48,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,109 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 [2021-11-03 03:40:48,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:40:48,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:40:48,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:40:48,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:48,257 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 [2021-11-03 03:40:48,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:40:48,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:40:48,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:40:48,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 03:40:48,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:40:48,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 03:40:48,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:40:48,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,519 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,560 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-03 03:40:48,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-03 03:40:48,604 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,627 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,649 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-03 03:40:48,675 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 03:40:48,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-03 03:40:48,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-03 03:40:48,694 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:48,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:48,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-03 03:40:48,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-03 03:40:48,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:48,846 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.0 percent of original size [2021-11-03 03:40:48,879 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-11-03 03:40:48,909 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:40:49,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:40:49,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:40:49,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 03:40:49,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874077595] [2021-11-03 03:40:49,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:40:49,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:40:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:40:49,279 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) [2021-11-03 03:40:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:49,328 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-03 03:40:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:40:49,329 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 [2021-11-03 03:40:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:49,330 INFO L225 Difference]: With dead ends: 12 [2021-11-03 03:40:49,330 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 03:40:49,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-03 03:40:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 03:40:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 03:40:49,334 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) [2021-11-03 03:40:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 03:40:49,335 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 03:40:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:49,335 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 03:40:49,335 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) [2021-11-03 03:40:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 03:40:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:40:49,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:49,337 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 03:40:49,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:49,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-03 03:40:49,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:49,552 INFO L85 PathProgramCache]: Analyzing trace with hash -142215703, now seen corresponding path program 2 times [2021-11-03 03:40:49,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:49,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349267228] [2021-11-03 03:40:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:49,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:49,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:49,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349267228] [2021-11-03 03:40:49,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349267228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:40:49,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21143622] [2021-11-03 03:40:49,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:40:49,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:40:49,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:49,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:40:49,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 03:40:49,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 03:40:49,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:40:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 03:40:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:49,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:50,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21143622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:40:50,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912226844] [2021-11-03 03:40:50,282 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:40:50,282 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:40:50,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:40:50,283 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:40:50,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:40:50,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,305 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:50,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:40:50,310 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:50,314 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:40:50,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 03:40:50,329 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 03:40:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,366 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 [2021-11-03 03:40:50,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:40:50,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:40:50,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:40:50,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:40:50,417 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 [2021-11-03 03:40:50,421 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:40:50,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:40:50,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:40:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 03:40:50,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:40:50,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 03:40:50,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:40:50,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,548 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:50,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,553 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:50,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,580 INFO L185 QuantifierPusher]: treesize reduction 8, result has 91.7 percent of original size 88 [2021-11-03 03:40:50,585 INFO L185 QuantifierPusher]: treesize reduction 8, result has 91.7 percent of original size 88 [2021-11-03 03:40:50,595 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:40:50,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:40:50,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-03 03:40:50,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 03:40:50,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:40:50,674 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.0 percent of original size [2021-11-03 03:40:50,703 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-11-03 03:40:50,715 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:40:51,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:40:51,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:40:51,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-03 03:40:51,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507284892] [2021-11-03 03:40:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 03:40:51,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 03:40:51,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-03 03:40:51,104 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) [2021-11-03 03:40:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:51,613 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-03 03:40:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:40:51,614 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 [2021-11-03 03:40:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:51,615 INFO L225 Difference]: With dead ends: 18 [2021-11-03 03:40:51,615 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 03:40:51,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-11-03 03:40:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 03:40:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-03 03:40:51,621 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) [2021-11-03 03:40:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-03 03:40:51,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-03 03:40:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:51,622 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-03 03:40:51,622 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) [2021-11-03 03:40:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-03 03:40:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:40:51,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:51,623 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-11-03 03:40:51,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:51,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:40:51,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash -361503255, now seen corresponding path program 3 times [2021-11-03 03:40:51,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:51,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938818270] [2021-11-03 03:40:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:51,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:40:51,899 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 03:40:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:40:52,045 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 03:40:52,045 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 03:40:52,047 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:40:52,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-03 03:40:52,053 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-03 03:40:52,056 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 03:40:52,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:40:52 BoogieIcfgContainer [2021-11-03 03:40:52,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 03:40:52,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 03:40:52,112 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 03:40:52,112 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 03:40:52,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:47" (3/4) ... [2021-11-03 03:40:52,116 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 03:40:52,117 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 03:40:52,119 INFO L168 Benchmark]: Toolchain (without parser) took 5967.89 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 88.8 MB in the beginning and 57.8 MB in the end (delta: 31.0 MB). Peak memory consumption was 53.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:52,120 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 113.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:40:52,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.00 ms. Allocated memory is still 113.2 MB. Free memory was 88.8 MB in the beginning and 89.1 MB in the end (delta: -236.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:52,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:52,127 INFO L168 Benchmark]: Boogie Preprocessor took 26.27 ms. Allocated memory is still 113.2 MB. Free memory was 87.7 MB in the beginning and 86.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:40:52,129 INFO L168 Benchmark]: RCFGBuilder took 501.99 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 75.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:52,133 INFO L168 Benchmark]: TraceAbstraction took 5067.28 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 75.1 MB in the beginning and 58.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 41.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:52,134 INFO L168 Benchmark]: Witness Printer took 9.84 ms. Allocated memory is still 136.3 MB. Free memory was 58.9 MB in the beginning and 57.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:40:52,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 113.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.00 ms. Allocated memory is still 113.2 MB. Free memory was 88.8 MB in the beginning and 89.1 MB in the end (delta: -236.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.27 ms. Allocated memory is still 113.2 MB. Free memory was 87.7 MB in the beginning and 86.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 501.99 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 75.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5067.28 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 75.1 MB in the beginning and 58.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 41.1 MB. Max. memory is 16.1 GB. * Witness Printer took 9.84 ms. Allocated memory is still 136.3 MB. Free memory was 58.9 MB in the beginning and 57.8 MB in the end (delta: 1.0 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: 8]: 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 23, overapproximation of bitwiseAnd at line 24. Possible FailurePath: [L16] unsigned char x = __VERIFIER_nondet_uchar(); [L17] unsigned char y; [L18] unsigned char c; [L20] y = 0 [L21] c = 0 [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND TRUE bit != (unsigned char)0 [L26] y = y + i [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND TRUE bit != (unsigned char)0 [L26] y = y + i [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND TRUE bit != (unsigned char)0 [L26] y = y + i [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND TRUE bit != (unsigned char)0 [L26] y = y + i [L28] c = c + ((unsigned char)1) [L22] COND FALSE !(c < (unsigned char)8) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, 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, 1.4s 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, 0.9s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 3 NumberOfNonLiveVariables, 106 ConjunctsInSsa, 22 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 [2021-11-03 03:40:52,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH --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 eed2e8df987302e7b4776cd78a5dfa18f2ec05bebbebf3053d8131bf9a8de623 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:40:55,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:40:55,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:40:55,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:40:55,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:40:55,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:40:55,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:40:55,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:40:55,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:40:55,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:40:55,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:40:55,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:40:55,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:40:55,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:40:55,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:40:55,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:40:55,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:40:55,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:40:55,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:40:55,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:40:55,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:40:55,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:40:55,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:40:55,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:40:55,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:40:55,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:40:55,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:40:55,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:40:55,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:40:55,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:40:55,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:40:55,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:40:55,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:40:55,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:40:55,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:40:55,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:40:55,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:40:55,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:40:55,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:40:55,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:40:55,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:40:55,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:40:55,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:40:55,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:40:55,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:40:55,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:40:55,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:40:55,360 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:40:55,360 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:40:55,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:40:55,361 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:40:55,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:40:55,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:40:55,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:40:55,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:40:55,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:40:55,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:40:55,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:40:55,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:40:55,367 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:40:55,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:40:55,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:40:55,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:40:55,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:40:55,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:40:55,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:40:55,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:40:55,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:40:55,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:55,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:40:55,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:40:55,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:40:55,372 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:40:55,372 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:40:55,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:40:55,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:40:55,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:40:55,374 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_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eed2e8df987302e7b4776cd78a5dfa18f2ec05bebbebf3053d8131bf9a8de623 [2021-11-03 03:40:55,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:55,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:55,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:55,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:55,871 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:55,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-03 03:40:55,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/046c2b075/14dbf67e339b481189023f6fe2626e43/FLAGdd2164e82 [2021-11-03 03:40:56,599 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:56,600 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-03 03:40:56,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/046c2b075/14dbf67e339b481189023f6fe2626e43/FLAGdd2164e82 [2021-11-03 03:40:56,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/data/046c2b075/14dbf67e339b481189023f6fe2626e43 [2021-11-03 03:40:56,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:56,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:56,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:56,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:56,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:56,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:56" (1/1) ... [2021-11-03 03:40:56,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153bc671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:56, skipping insertion in model container [2021-11-03 03:40:56,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:56" (1/1) ... [2021-11-03 03:40:56,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:57,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:57,210 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_1e761c69-a473-4f4b-b007-a796b1e6cea5/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2021-11-03 03:40:57,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:57,241 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:40:57,263 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_1e761c69-a473-4f4b-b007-a796b1e6cea5/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2021-11-03 03:40:57,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:57,289 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:40:57,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57 WrapperNode [2021-11-03 03:40:57,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:57,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:57,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:40:57,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:40:57,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:57,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:40:57,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:40:57,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:40:57,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:40:57,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:40:57,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:40:57,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:40:57,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (1/1) ... [2021-11-03 03:40:57,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:57,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:57,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:40:57,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:40:57,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:40:57,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:40:57,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:40:57,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:40:57,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:40:57,782 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 03:40:57,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:57 BoogieIcfgContainer [2021-11-03 03:40:57,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:40:57,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:40:57,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:40:57,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:40:57,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:56" (1/3) ... [2021-11-03 03:40:57,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bc64c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:57, skipping insertion in model container [2021-11-03 03:40:57,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:57" (2/3) ... [2021-11-03 03:40:57,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bc64c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:57, skipping insertion in model container [2021-11-03 03:40:57,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:57" (3/3) ... [2021-11-03 03:40:57,795 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-03 03:40:57,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:40:57,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:40:57,864 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:40:57,872 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 [2021-11-03 03:40:57,872 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:40:57,889 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) [2021-11-03 03:40:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:40:57,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:57,896 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:40:57,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-03 03:40:57,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:57,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483548591] [2021-11-03 03:40:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:57,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:57,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:57,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:40:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:58,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:40:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:58,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:58,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:58,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483548591] [2021-11-03 03:40:58,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483548591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:58,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:58,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:40:58,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965329913] [2021-11-03 03:40:58,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:40:58,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:40:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:40:58,215 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) [2021-11-03 03:40:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:58,231 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-03 03:40:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:40:58,233 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 [2021-11-03 03:40:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:58,243 INFO L225 Difference]: With dead ends: 21 [2021-11-03 03:40:58,243 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 03:40:58,246 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 [2021-11-03 03:40:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 03:40:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 03:40:58,363 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) [2021-11-03 03:40:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-03 03:40:58,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-03 03:40:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:58,368 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-03 03:40:58,369 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) [2021-11-03 03:40:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-03 03:40:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:40:58,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:58,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:40:58,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:58,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:58,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-03 03:40:58,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:58,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824190246] [2021-11-03 03:40:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:58,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:58,578 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:58,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:40:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:40:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:58,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:58,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:58,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824190246] [2021-11-03 03:40:58,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824190246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:58,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:58,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:40:58,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645332362] [2021-11-03 03:40:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:58,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:58,784 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) [2021-11-03 03:40:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:58,820 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-03 03:40:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:58,823 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 [2021-11-03 03:40:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:58,824 INFO L225 Difference]: With dead ends: 17 [2021-11-03 03:40:58,824 INFO L226 Difference]: Without dead ends: 13 [2021-11-03 03:40:58,826 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 [2021-11-03 03:40:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-03 03:40:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-03 03:40:58,833 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) [2021-11-03 03:40:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-03 03:40:58,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-11-03 03:40:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:58,840 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-03 03:40:58,841 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) [2021-11-03 03:40:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-03 03:40:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:40:58,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:58,844 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:58,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:59,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:59,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 1 times [2021-11-03 03:40:59,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:59,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106896961] [2021-11-03 03:40:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:59,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:59,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:59,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:59,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:40:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:40:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:59,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106896961] [2021-11-03 03:40:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106896961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:40:59,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1074312381] [2021-11-03 03:40:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:59,371 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:40:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:40:59,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:40:59,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-03 03:40:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:59,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:40:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1074312381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:40:59,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137746291] [2021-11-03 03:40:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:59,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:40:59,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:59,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:40:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 03:40:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:40:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137746291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:40:59,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:40:59,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-03 03:40:59,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607832029] [2021-11-03 03:40:59,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:40:59,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:40:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:40:59,991 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) [2021-11-03 03:41:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:00,159 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-03 03:41:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:41:00,161 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 [2021-11-03 03:41:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:00,162 INFO L225 Difference]: With dead ends: 29 [2021-11-03 03:41:00,163 INFO L226 Difference]: Without dead ends: 25 [2021-11-03 03:41:00,166 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 [2021-11-03 03:41:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-03 03:41:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-03 03:41:00,177 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) [2021-11-03 03:41:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-03 03:41:00,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 12 [2021-11-03 03:41:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:00,180 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-03 03:41:00,181 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) [2021-11-03 03:41:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-03 03:41:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-03 03:41:00,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:00,183 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:00,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:00,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:00,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-03 03:41:00,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:41:00,788 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:41:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 2 times [2021-11-03 03:41:00,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:00,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352523784] [2021-11-03 03:41:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:41:00,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:00,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:00,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:41:00,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:41:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:41:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:41:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:01,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:01,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:01,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352523784] [2021-11-03 03:41:01,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352523784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:41:01,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1202350744] [2021-11-03 03:41:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:41:01,331 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:41:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:41:01,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:41:01,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-03 03:41:01,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:41:01,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:41:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:41:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:01,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:01,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1202350744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:41:01,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764575029] [2021-11-03 03:41:01,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:41:01,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:41:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:41:01,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:41:01,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 03:41:01,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:41:01,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:41:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:41:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:02,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:02,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764575029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:41:02,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:41:02,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-11-03 03:41:02,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057693525] [2021-11-03 03:41:02,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 03:41:02,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 03:41:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-11-03 03:41:02,459 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) [2021-11-03 03:41:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:02,979 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-11-03 03:41:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 03:41:02,980 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 [2021-11-03 03:41:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:02,982 INFO L225 Difference]: With dead ends: 53 [2021-11-03 03:41:02,982 INFO L226 Difference]: Without dead ends: 49 [2021-11-03 03:41:02,982 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 [2021-11-03 03:41:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-03 03:41:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-03 03:41:02,989 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) [2021-11-03 03:41:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-11-03 03:41:02,991 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 24 [2021-11-03 03:41:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:02,991 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-11-03 03:41:02,991 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) [2021-11-03 03:41:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-11-03 03:41:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:41:02,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:02,993 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-03 03:41:03,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:03,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:03,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:03,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:41:03,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:41:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-03 03:41:03,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:03,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135863822] [2021-11-03 03:41:03,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:41:03,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:03,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:03,607 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:03,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:41:03,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-03 03:41:03,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:41:03,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 03:41:03,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:07,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:12,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:12,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135863822] [2021-11-03 03:41:12,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135863822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:41:12,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2023488670] [2021-11-03 03:41:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:41:12,637 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:41:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:41:12,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:41:12,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 03:41:13,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-03 03:41:13,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:41:13,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 03:41:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:14,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:16,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2023488670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:41:16,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113974124] [2021-11-03 03:41:16,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:41:16,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:41:16,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:41:16,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:41:16,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-03 03:41:16,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-03 03:41:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:41:16,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-03 03:41:16,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:20,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:24,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113974124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:41:24,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:41:24,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 82 [2021-11-03 03:41:24,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378715985] [2021-11-03 03:41:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-03 03:41:24,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-03 03:41:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=4901, Unknown=0, NotChecked=0, Total=6642 [2021-11-03 03:41:24,020 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) [2021-11-03 03:42:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:23,603 INFO L93 Difference]: Finished difference Result 388 states and 518 transitions. [2021-11-03 03:42:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-03 03:42:23,604 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 [2021-11-03 03:42:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:23,611 INFO L225 Difference]: With dead ends: 388 [2021-11-03 03:42:23,611 INFO L226 Difference]: Without dead ends: 360 [2021-11-03 03:42:23,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11908 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=7865, Invalid=22585, Unknown=0, NotChecked=0, Total=30450 [2021-11-03 03:42:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-03 03:42:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 194. [2021-11-03 03:42:23,670 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) [2021-11-03 03:42:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2021-11-03 03:42:23,674 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 30 [2021-11-03 03:42:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:23,675 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2021-11-03 03:42:23,675 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) [2021-11-03 03:42:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2021-11-03 03:42:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:42:23,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:23,678 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:23,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:23,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:24,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:24,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:24,292 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:42:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-11-03 03:42:24,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:24,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716687760] [2021-11-03 03:42:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:24,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:24,294 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:24,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:42:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:24,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 03:42:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:26,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:30,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:30,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716687760] [2021-11-03 03:42:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716687760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:42:30,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1490500110] [2021-11-03 03:42:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:30,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:42:30,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:42:30,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:42:30,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 03:42:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:31,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 03:42:31,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:31,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:32,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1490500110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:42:32,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225359901] [2021-11-03 03:42:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:32,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:42:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:42:32,963 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:42:32,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 03:42:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:33,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 03:42:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:35,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:41,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225359901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:42:41,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:42:41,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-03 03:42:41,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466013329] [2021-11-03 03:42:41,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-03 03:42:41,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-03 03:42:41,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=5106, Unknown=0, NotChecked=0, Total=6320 [2021-11-03 03:42:41,188 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) [2021-11-03 03:43:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:39,973 INFO L93 Difference]: Finished difference Result 448 states and 593 transitions. [2021-11-03 03:43:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-03 03:43:39,974 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 [2021-11-03 03:43:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:39,977 INFO L225 Difference]: With dead ends: 448 [2021-11-03 03:43:39,978 INFO L226 Difference]: Without dead ends: 351 [2021-11-03 03:43:39,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7116 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=4666, Invalid=20774, Unknown=0, NotChecked=0, Total=25440 [2021-11-03 03:43:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-03 03:43:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2021-11-03 03:43:40,044 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) [2021-11-03 03:43:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 303 transitions. [2021-11-03 03:43:40,048 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 303 transitions. Word has length 30 [2021-11-03 03:43:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:40,048 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 303 transitions. [2021-11-03 03:43:40,049 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) [2021-11-03 03:43:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 303 transitions. [2021-11-03 03:43:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:43:40,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:40,051 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:40,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:40,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:40,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:40,659 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:43:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-11-03 03:43:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:40,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191970237] [2021-11-03 03:43:40,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:40,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:40,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:40,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:40,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:43:41,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:41,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 03:43:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:43,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:47,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:47,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191970237] [2021-11-03 03:43:47,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191970237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:47,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [426921362] [2021-11-03 03:43:47,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:47,408 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:43:47,409 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:43:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 03:43:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:48,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 03:43:48,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:49,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [426921362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:50,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42629353] [2021-11-03 03:43:50,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:50,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:43:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:43:50,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:43:50,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 03:43:51,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:51,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:51,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 03:43:51,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:52,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:58,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42629353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:58,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:43:58,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-03 03:43:58,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694574283] [2021-11-03 03:43:58,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-03 03:43:58,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-03 03:43:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=5156, Unknown=0, NotChecked=0, Total=6320 [2021-11-03 03:43:58,976 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) [2021-11-03 03:45:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:53,272 INFO L93 Difference]: Finished difference Result 643 states and 860 transitions. [2021-11-03 03:45:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-03 03:45:53,272 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 [2021-11-03 03:45:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:53,277 INFO L225 Difference]: With dead ends: 643 [2021-11-03 03:45:53,277 INFO L226 Difference]: Without dead ends: 549 [2021-11-03 03:45:53,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20490 ImplicationChecksByTransitivity, 118.6s TimeCoverageRelationStatistics Valid=10238, Invalid=55042, Unknown=0, NotChecked=0, Total=65280 [2021-11-03 03:45:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-03 03:45:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 266. [2021-11-03 03:45:53,353 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) [2021-11-03 03:45:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 359 transitions. [2021-11-03 03:45:53,356 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 359 transitions. Word has length 30 [2021-11-03 03:45:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:53,357 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 359 transitions. [2021-11-03 03:45:53,357 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) [2021-11-03 03:45:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 359 transitions. [2021-11-03 03:45:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:45:53,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:53,360 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:53,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:53,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:53,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 03:45:53,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:45:53,966 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-11-03 03:45:53,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:45:53,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892368706] [2021-11-03 03:45:53,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:45:53,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:45:53,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:45:53,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:45:53,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:45:55,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-03 03:45:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:45:55,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-03 03:45:55,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:58,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:03,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:03,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892368706] [2021-11-03 03:46:03,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892368706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:03,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521641747] [2021-11-03 03:46:03,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:46:03,908 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:46:03,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:46:03,909 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:46:03,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 03:46:05,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-03 03:46:05,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:46:05,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-03 03:46:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:06,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:08,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1521641747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:08,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146689851] [2021-11-03 03:46:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:46:08,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:08,229 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:46:08,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 03:46:09,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-03 03:46:09,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:46:09,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 03:46:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:13,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:17,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146689851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:17,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:46:17,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-03 03:46:17,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338830587] [2021-11-03 03:46:17,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-03 03:46:17,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-03 03:46:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=5399, Unknown=0, NotChecked=0, Total=6806 [2021-11-03 03:46:17,414 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) [2021-11-03 03:47:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:40,147 INFO L93 Difference]: Finished difference Result 740 states and 983 transitions. [2021-11-03 03:47:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-03 03:47:40,147 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 [2021-11-03 03:47:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:40,153 INFO L225 Difference]: With dead ends: 740 [2021-11-03 03:47:40,154 INFO L226 Difference]: Without dead ends: 648 [2021-11-03 03:47:40,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14808 ImplicationChecksByTransitivity, 89.0s TimeCoverageRelationStatistics Valid=8675, Invalid=32331, Unknown=0, NotChecked=0, Total=41006 [2021-11-03 03:47:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-03 03:47:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 422. [2021-11-03 03:47:40,247 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) [2021-11-03 03:47:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 571 transitions. [2021-11-03 03:47:40,248 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 571 transitions. Word has length 30 [2021-11-03 03:47:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:40,249 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 571 transitions. [2021-11-03 03:47:40,249 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) [2021-11-03 03:47:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 571 transitions. [2021-11-03 03:47:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:47:40,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:40,252 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:40,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:40,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:40,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:40,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:40,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-11-03 03:47:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:40,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628895025] [2021-11-03 03:47:40,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:47:40,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:40,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:40,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 03:47:41,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:47:41,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:41,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 03:47:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:43,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:47,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:47:47,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628895025] [2021-11-03 03:47:47,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628895025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:47,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1078698644] [2021-11-03 03:47:47,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:47:47,226 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:47:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:47:47,229 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:47:47,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 03:47:48,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:47:48,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:48,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 03:47:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:49,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:50,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1078698644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:50,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496611543] [2021-11-03 03:47:50,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:47:50,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:50,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:50,442 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:47:50,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 03:47:51,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:47:51,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:51,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-03 03:47:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:53,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:58,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496611543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:58,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:47:58,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-03 03:47:58,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528042600] [2021-11-03 03:47:58,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-03 03:47:58,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:47:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-03 03:47:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-03 03:47:58,877 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) [2021-11-03 03:49:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:37,189 INFO L93 Difference]: Finished difference Result 816 states and 1091 transitions. [2021-11-03 03:49:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-03 03:49:37,189 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 [2021-11-03 03:49:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:37,194 INFO L225 Difference]: With dead ends: 816 [2021-11-03 03:49:37,194 INFO L226 Difference]: Without dead ends: 690 [2021-11-03 03:49:37,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12037 ImplicationChecksByTransitivity, 100.3s TimeCoverageRelationStatistics Valid=6460, Invalid=35770, Unknown=0, NotChecked=0, Total=42230 [2021-11-03 03:49:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-03 03:49:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 521. [2021-11-03 03:49:37,305 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) [2021-11-03 03:49:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 708 transitions. [2021-11-03 03:49:37,308 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 708 transitions. Word has length 30 [2021-11-03 03:49:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:37,308 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 708 transitions. [2021-11-03 03:49:37,308 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) [2021-11-03 03:49:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 708 transitions. [2021-11-03 03:49:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:49:37,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:37,311 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:37,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-03 03:49:37,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:37,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:37,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:49:37,919 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:49:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:37,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-11-03 03:49:37,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:37,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204897699] [2021-11-03 03:49:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 03:49:37,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:37,921 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:37,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 03:49:39,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-03 03:49:39,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:49:39,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-03 03:49:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:45,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:45,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204897699] [2021-11-03 03:49:45,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204897699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:49:45,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416012665] [2021-11-03 03:49:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 03:49:45,672 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:49:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:49:45,685 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:49:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 03:49:47,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-03 03:49:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:49:47,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 03:49:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:48,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:49,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416012665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:49:49,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035318215] [2021-11-03 03:49:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 03:49:49,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:49:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:49:49,696 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:49:49,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 03:49:51,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-03 03:49:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:49:51,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-03 03:49:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:52,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035318215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:49:58,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:49:58,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-03 03:49:58,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531864229] [2021-11-03 03:49:58,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-03 03:49:58,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-03 03:49:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-03 03:49:58,456 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) [2021-11-03 03:51:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:36,681 INFO L93 Difference]: Finished difference Result 869 states and 1168 transitions. [2021-11-03 03:51:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-03 03:51:36,681 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 [2021-11-03 03:51:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:36,688 INFO L225 Difference]: With dead ends: 869 [2021-11-03 03:51:36,688 INFO L226 Difference]: Without dead ends: 737 [2021-11-03 03:51:36,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13499 ImplicationChecksByTransitivity, 102.6s TimeCoverageRelationStatistics Valid=7480, Invalid=38530, Unknown=0, NotChecked=0, Total=46010 [2021-11-03 03:51:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-03 03:51:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 544. [2021-11-03 03:51:36,800 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) [2021-11-03 03:51:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 739 transitions. [2021-11-03 03:51:36,803 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 739 transitions. Word has length 30 [2021-11-03 03:51:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:36,803 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 739 transitions. [2021-11-03 03:51:36,803 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) [2021-11-03 03:51:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 739 transitions. [2021-11-03 03:51:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 03:51:36,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:36,804 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:36,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-03 03:51:37,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:37,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-03 03:51:37,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:51:37,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:51:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-11-03 03:51:37,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:37,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597769860] [2021-11-03 03:51:37,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 03:51:37,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:37,412 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:37,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 03:51:38,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-03 03:51:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:51:38,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 03:51:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:40,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:45,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:45,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597769860] [2021-11-03 03:51:45,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597769860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:51:45,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1610525643] [2021-11-03 03:51:45,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 03:51:45,275 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:51:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:51:45,276 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:51:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 03:51:47,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-03 03:51:47,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:51:47,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 03:51:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1610525643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:51:49,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593655279] [2021-11-03 03:51:49,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 03:51:49,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:51:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:51:49,560 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:51:49,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e761c69-a473-4f4b-b007-a796b1e6cea5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-03 03:51:51,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-03 03:51:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:51:51,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-03 03:51:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:53,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:58,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593655279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:51:58,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:51:58,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-03 03:51:58,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463751103] [2021-11-03 03:51:58,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-03 03:51:58,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:58,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-03 03:51:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=5532, Unknown=0, NotChecked=0, Total=6806 [2021-11-03 03:51:58,963 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)