./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/xor5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:01,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:01,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:01,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:01,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:01,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:01,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:01,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:01,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:01,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:01,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:01,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:01,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:01,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:01,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:01,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:01,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:01,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:01,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:01,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:01,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:01,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:01,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:01,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:01,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:01,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:01,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:01,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:01,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:01,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:01,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:01,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:01,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:01,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:01,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:01,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:01,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:01,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:01,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:01,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:01,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:01,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:55:01,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:01,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:01,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:01,689 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:01,689 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:01,690 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:01,690 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:55:01,690 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:01,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:01,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:55:01,691 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:55:01,692 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:01,692 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:55:01,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:55:01,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:55:01,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:01,695 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:55:01,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:55:01,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:55:01,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:01,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:01,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:01,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:01,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:01,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:55:01,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:01,698 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:01,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:01,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:01,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:01,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:01,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:01,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:01,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:01,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:55:01,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:55:01,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:01,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:01,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:01,702 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_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2021-11-07 00:55:02,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:02,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:02,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:02,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:02,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:02,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-crafted/xor5.i [2021-11-07 00:55:02,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/57b5e851c/cbf6246d5c26428987f97c3cf3450885/FLAG314bc6e42 [2021-11-07 00:55:02,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:02,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/sv-benchmarks/c/array-crafted/xor5.i [2021-11-07 00:55:02,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/57b5e851c/cbf6246d5c26428987f97c3cf3450885/FLAG314bc6e42 [2021-11-07 00:55:03,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/57b5e851c/cbf6246d5c26428987f97c3cf3450885 [2021-11-07 00:55:03,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:03,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:03,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:03,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:03,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:03,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b80253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03, skipping insertion in model container [2021-11-07 00:55:03,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:03,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:03,275 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_f05234aa-f88d-40a0-9496-a77c582b520e/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-11-07 00:55:03,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:03,286 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:55:03,309 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_f05234aa-f88d-40a0-9496-a77c582b520e/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-11-07 00:55:03,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:03,324 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:55:03,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03 WrapperNode [2021-11-07 00:55:03,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:03,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:03,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:55:03,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:55:03,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:03,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:55:03,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:55:03,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:55:03,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:55:03,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:55:03,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:55:03,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:55:03,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (1/1) ... [2021-11-07 00:55:03,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:03,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:03,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:55:03,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:55:03,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:55:03,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:55:03,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 00:55:03,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:55:03,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:55:03,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 00:55:03,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:55:03,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:55:03,958 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-07 00:55:03,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:03 BoogieIcfgContainer [2021-11-07 00:55:03,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:55:03,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:55:03,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:55:03,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:55:03,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:55:03" (1/3) ... [2021-11-07 00:55:03,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5245e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:03, skipping insertion in model container [2021-11-07 00:55:03,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:03" (2/3) ... [2021-11-07 00:55:03,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5245e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:03, skipping insertion in model container [2021-11-07 00:55:03,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:03" (3/3) ... [2021-11-07 00:55:03,984 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2021-11-07 00:55:03,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:55:03,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:55:04,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:55:04,044 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:55:04,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:55:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 00:55:04,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:04,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:04,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1392646538, now seen corresponding path program 1 times [2021-11-07 00:55:04,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:04,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049696637] [2021-11-07 00:55:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:04,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:04,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049696637] [2021-11-07 00:55:04,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049696637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:04,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:04,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:04,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174439330] [2021-11-07 00:55:04,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:04,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:04,298 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:04,364 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-11-07 00:55:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Word has length 9 [2021-11-07 00:55:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:04,393 INFO L225 Difference]: With dead ends: 24 [2021-11-07 00:55:04,394 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 00:55:04,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 00:55:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 00:55:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-11-07 00:55:04,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2021-11-07 00:55:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:04,432 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-11-07 00:55:04,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-11-07 00:55:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:55:04,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:04,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:04,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:55:04,434 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash -13332003, now seen corresponding path program 1 times [2021-11-07 00:55:04,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:04,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082286500] [2021-11-07 00:55:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:04,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:55:04,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:04,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082286500] [2021-11-07 00:55:04,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082286500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:04,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:04,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:55:04,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652126830] [2021-11-07 00:55:04,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:04,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:04,522 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:04,577 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2021-11-07 00:55:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-07 00:55:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:04,579 INFO L225 Difference]: With dead ends: 20 [2021-11-07 00:55:04,579 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 00:55:04,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 00:55:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 00:55:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-11-07 00:55:04,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2021-11-07 00:55:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:04,586 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-11-07 00:55:04,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-11-07 00:55:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 00:55:04,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:04,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:04,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 00:55:04,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1561250112, now seen corresponding path program 1 times [2021-11-07 00:55:04,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:04,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649762793] [2021-11-07 00:55:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:04,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:55:04,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:04,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649762793] [2021-11-07 00:55:04,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649762793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:04,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:04,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:55:04,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999285678] [2021-11-07 00:55:04,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:04,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:04,701 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:04,755 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-11-07 00:55:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-11-07 00:55:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:04,758 INFO L225 Difference]: With dead ends: 20 [2021-11-07 00:55:04,758 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 00:55:04,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 00:55:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 00:55:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-07 00:55:04,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 13 [2021-11-07 00:55:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:04,770 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-07 00:55:04,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-07 00:55:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 00:55:04,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:04,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:04,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 00:55:04,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:04,775 INFO L85 PathProgramCache]: Analyzing trace with hash 592403004, now seen corresponding path program 1 times [2021-11-07 00:55:04,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:04,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011348886] [2021-11-07 00:55:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:04,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:55:04,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:04,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011348886] [2021-11-07 00:55:04,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011348886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 00:55:04,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962236362] [2021-11-07 00:55:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:04,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:55:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:04,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:55:04,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 00:55:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:04,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:55:05,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:55:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962236362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:05,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505656837] [2021-11-07 00:55:05,259 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-07 00:55:05,259 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:55:05,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:55:05,274 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:55:05,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:55:05,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,316 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 00:55:05,321 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 00:55:05,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 158 [2021-11-07 00:55:05,350 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 10=[|v_#valid_14|]} [2021-11-07 00:55:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 00:55:05,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 00:55:05,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 00:55:05,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 00:55:05,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:55:05,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:55:05,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-11-07 00:55:05,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:155, output treesize:140 [2021-11-07 00:55:05,506 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.2 percent of original size [2021-11-07 00:55:05,508 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-07 00:55:05,527 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-07 00:55:05,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-07 00:55:05,544 INFO L446 ElimStorePlain]: Different costs {3=[|v_#length_12|], 10=[|v_#valid_15|]} [2021-11-07 00:55:05,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-11-07 00:55:05,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,569 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-07 00:55:05,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-07 00:55:05,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-07 00:55:05,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:55:05,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:55:05,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-07 00:55:05,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,665 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:170, output treesize:163 [2021-11-07 00:55:05,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,707 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,708 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,713 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:05,716 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:55:05,717 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,727 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-07 00:55:05,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 00:55:05,732 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:05,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-07 00:55:05,741 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.4 percent of original size 184 [2021-11-07 00:55:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 112 [2021-11-07 00:55:05,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-07 00:55:05,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-07 00:55:05,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:05,858 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.4 percent of original size [2021-11-07 00:55:05,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-11-07 00:55:05,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:55:05,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:185, output treesize:179 [2021-11-07 00:55:05,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:05,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,006 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,009 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 00:55:06,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 00:55:06,011 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,025 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,032 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 00:55:06,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-07 00:55:06,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 383 [2021-11-07 00:55:06,049 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 364 [2021-11-07 00:55:06,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 365 [2021-11-07 00:55:06,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,089 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,090 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,094 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 00:55:06,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 00:55:06,097 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,100 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-07 00:55:06,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-07 00:55:06,112 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-07 00:55:06,122 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,124 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,125 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 00:55:06,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 00:55:06,130 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,133 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 00:55:06,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-07 00:55:06,139 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-11-07 00:55:06,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 399 [2021-11-07 00:55:06,148 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 372 [2021-11-07 00:55:06,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 427 [2021-11-07 00:55:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 29 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 132 [2021-11-07 00:55:06,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-07 00:55:06,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-07 00:55:06,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:06,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 117 [2021-11-07 00:55:06,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 00:55:06,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 00:55:06,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:06,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,469 INFO L180 QuantifierPusher]: treesize reduction 82, result has 83.4 percent of original size [2021-11-07 00:55:06,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 423 [2021-11-07 00:55:06,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 00:55:06,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:501, output treesize:423 [2021-11-07 00:55:06,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,567 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-07 00:55:06,574 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,575 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:55:06,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 00:55:06,578 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 00:55:06,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-07 00:55:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-07 00:55:06,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:55:06,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:55:06,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:06,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-07 00:55:06,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:55:06,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:68 [2021-11-07 00:55:06,607 INFO L180 QuantifierPusher]: treesize reduction 31, result has 69.6 percent of original size [2021-11-07 00:55:06,615 INFO L185 QuantifierPusher]: treesize reduction 3, result has 94.8 percent of original size 55 [2021-11-07 00:55:06,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-07 00:55:06,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,760 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.1 percent of original size [2021-11-07 00:55:06,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-07 00:55:06,773 INFO L180 QuantifierPusher]: treesize reduction 31, result has 82.6 percent of original size [2021-11-07 00:55:06,777 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-07 00:55:06,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-07 00:55:06,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-07 00:55:06,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 00:55:06,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 00:55:06,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-07 00:55:06,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 00:55:06,854 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 00:55:06,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:06,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,870 INFO L180 QuantifierPusher]: treesize reduction 16, result has 91.3 percent of original size [2021-11-07 00:55:06,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 167 [2021-11-07 00:55:06,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 00:55:06,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:223, output treesize:167 [2021-11-07 00:55:06,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-07 00:55:06,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:06,950 INFO L180 QuantifierPusher]: treesize reduction 30, result has 71.4 percent of original size [2021-11-07 00:55:06,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-07 00:55:06,965 INFO L180 QuantifierPusher]: treesize reduction 31, result has 83.0 percent of original size [2021-11-07 00:55:06,971 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:06,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 00:55:06,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-07 00:55:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:06,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:55:06,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 00:55:06,996 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:06,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:06,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:07,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:07,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:07,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:55:07,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 00:55:07,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:07,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:07,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:07,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-11-07 00:55:07,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 00:55:07,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:262, output treesize:240 [2021-11-07 00:55:07,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,095 INFO L180 QuantifierPusher]: treesize reduction 30, result has 80.0 percent of original size [2021-11-07 00:55:07,104 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:07,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 00:55:07,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-11-07 00:55:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:07,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-07 00:55:07,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:07,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 00:55:07,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:07,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-07 00:55:07,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:55:07,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:112, output treesize:108 [2021-11-07 00:55:07,138 INFO L180 QuantifierPusher]: treesize reduction 31, result has 80.6 percent of original size [2021-11-07 00:55:07,141 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:55:07,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:55:07,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 00:55:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-07 00:55:07,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:55:07,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:55:07,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:55:07,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-07 00:55:07,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:55:07,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:99, output treesize:95 [2021-11-07 00:55:07,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-07 00:55:07,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:07,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-07 00:55:07,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:55:07,296 INFO L180 QuantifierPusher]: treesize reduction 30, result has 74.1 percent of original size [2021-11-07 00:55:07,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-07 00:55:07,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:55:08,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:55:08,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 00:55:08,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-07 00:55:08,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945123079] [2021-11-07 00:55:08,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:55:08,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:08,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:55:08,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:55:08,427 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:08,460 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-07 00:55:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 14 [2021-11-07 00:55:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:08,461 INFO L225 Difference]: With dead ends: 27 [2021-11-07 00:55:08,461 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 00:55:08,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:55:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 00:55:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 00:55:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-07 00:55:08,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2021-11-07 00:55:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:08,465 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-07 00:55:08,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-07 00:55:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 00:55:08,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:08,466 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:08,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:08,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:55:08,667 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1719001655, now seen corresponding path program 2 times [2021-11-07 00:55:08,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:08,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676987850] [2021-11-07 00:55:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:08,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 00:55:08,733 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 00:55:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 00:55:08,835 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 00:55:08,836 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 00:55:08,837 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 00:55:08,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-07 00:55:08,842 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2021-11-07 00:55:08,845 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 00:55:08,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:55:08 BoogieIcfgContainer [2021-11-07 00:55:08,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 00:55:08,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 00:55:08,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 00:55:08,905 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 00:55:08,906 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:03" (3/4) ... [2021-11-07 00:55:08,909 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 00:55:08,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 00:55:08,910 INFO L168 Benchmark]: Toolchain (without parser) took 5875.29 ms. Allocated memory was 100.7 MB in the beginning and 140.5 MB in the end (delta: 39.8 MB). Free memory was 63.4 MB in the beginning and 50.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 52.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,910 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory is still 79.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:55:08,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.02 ms. Allocated memory is still 100.7 MB. Free memory was 63.2 MB in the beginning and 75.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,911 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.26 ms. Allocated memory is still 100.7 MB. Free memory was 75.4 MB in the beginning and 73.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,911 INFO L168 Benchmark]: Boogie Preprocessor took 31.57 ms. Allocated memory is still 100.7 MB. Free memory was 73.6 MB in the beginning and 72.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,912 INFO L168 Benchmark]: RCFGBuilder took 560.31 ms. Allocated memory is still 100.7 MB. Free memory was 72.0 MB in the beginning and 54.8 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,913 INFO L168 Benchmark]: TraceAbstraction took 4942.20 ms. Allocated memory was 100.7 MB in the beginning and 140.5 MB in the end (delta: 39.8 MB). Free memory was 54.4 MB in the beginning and 51.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 44.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,913 INFO L168 Benchmark]: Witness Printer took 4.34 ms. Allocated memory is still 140.5 MB. Free memory was 51.8 MB in the beginning and 50.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:08,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory is still 79.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.02 ms. Allocated memory is still 100.7 MB. Free memory was 63.2 MB in the beginning and 75.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.26 ms. Allocated memory is still 100.7 MB. Free memory was 75.4 MB in the beginning and 73.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.57 ms. Allocated memory is still 100.7 MB. Free memory was 73.6 MB in the beginning and 72.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 560.31 ms. Allocated memory is still 100.7 MB. Free memory was 72.0 MB in the beginning and 54.8 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4942.20 ms. Allocated memory was 100.7 MB in the beginning and 140.5 MB in the end (delta: 39.8 MB). Free memory was 54.4 MB in the beginning and 51.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 44.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.34 ms. Allocated memory is still 140.5 MB. Free memory was 51.8 MB in the beginning and 50.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND FALSE !(i < N) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) [L27] return res; [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) [L27] return res; [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2021-11-07 00:55:11,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:11,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:11,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:11,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:11,949 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:11,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-crafted/xor5.i [2021-11-07 00:55:12,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/2944178ce/13c5d706f4dc499ebddde699bb53ac72/FLAG13a30d2dc [2021-11-07 00:55:12,599 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:12,600 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/sv-benchmarks/c/array-crafted/xor5.i [2021-11-07 00:55:12,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/2944178ce/13c5d706f4dc499ebddde699bb53ac72/FLAG13a30d2dc [2021-11-07 00:55:12,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/data/2944178ce/13c5d706f4dc499ebddde699bb53ac72 [2021-11-07 00:55:12,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:12,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:12,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:12,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:12,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:12,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:12" (1/1) ... [2021-11-07 00:55:12,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44675ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:12, skipping insertion in model container [2021-11-07 00:55:12,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:12" (1/1) ... [2021-11-07 00:55:12,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:12,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:13,160 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_f05234aa-f88d-40a0-9496-a77c582b520e/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-11-07 00:55:13,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:13,202 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:55:13,232 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_f05234aa-f88d-40a0-9496-a77c582b520e/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2021-11-07 00:55:13,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:13,247 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:55:13,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13 WrapperNode [2021-11-07 00:55:13,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:13,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:13,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:55:13,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:55:13,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:13,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:55:13,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:55:13,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:55:13,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:55:13,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:55:13,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:55:13,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:55:13,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (1/1) ... [2021-11-07 00:55:13,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:13,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:13,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:55:13,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:55:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:55:13,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:55:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:55:13,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:55:13,873 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-07 00:55:13,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:13 BoogieIcfgContainer [2021-11-07 00:55:13,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:55:13,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:55:13,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:55:13,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:55:13,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:55:12" (1/3) ... [2021-11-07 00:55:13,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5993b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:13, skipping insertion in model container [2021-11-07 00:55:13,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:13" (2/3) ... [2021-11-07 00:55:13,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5993b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:13, skipping insertion in model container [2021-11-07 00:55:13,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:13" (3/3) ... [2021-11-07 00:55:13,894 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2021-11-07 00:55:13,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:55:13,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:55:13,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:55:13,970 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:55:13,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:55:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 00:55:13,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:13,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:13,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-11-07 00:55:14,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:14,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051148956] [2021-11-07 00:55:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:14,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:14,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:14,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:14,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:55:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:55:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:14,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:14,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:14,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051148956] [2021-11-07 00:55:14,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051148956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:14,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:14,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:55:14,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001402974] [2021-11-07 00:55:14,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:55:14,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:55:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:55:14,356 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:14,373 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-11-07 00:55:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:55:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-11-07 00:55:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:14,383 INFO L225 Difference]: With dead ends: 53 [2021-11-07 00:55:14,383 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 00:55:14,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:55:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 00:55:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 00:55:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-07 00:55:14,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-11-07 00:55:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:14,419 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-07 00:55:14,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-07 00:55:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 00:55:14,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:14,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:14,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:14,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:14,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-11-07 00:55:14,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:14,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316999829] [2021-11-07 00:55:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:14,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:14,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:14,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:55:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:55:14,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:14,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:14,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:14,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316999829] [2021-11-07 00:55:14,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316999829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:14,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:14,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:55:14,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190691625] [2021-11-07 00:55:14,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:14,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:14,901 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:14,974 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-07 00:55:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 18 [2021-11-07 00:55:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:14,976 INFO L225 Difference]: With dead ends: 46 [2021-11-07 00:55:14,982 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 00:55:14,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 00:55:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 00:55:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-07 00:55:14,990 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-11-07 00:55:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:14,990 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-07 00:55:14,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-07 00:55:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 00:55:14,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:14,992 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:15,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:15,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:15,198 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash -524663612, now seen corresponding path program 1 times [2021-11-07 00:55:15,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:15,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805870078] [2021-11-07 00:55:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:15,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:15,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:15,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:15,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:55:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:55:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:15,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:15,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:15,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805870078] [2021-11-07 00:55:15,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805870078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:15,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1461693576] [2021-11-07 00:55:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:15,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:15,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:15,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 00:55:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:55:15,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:16,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1461693576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:16,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108140357] [2021-11-07 00:55:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:16,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:55:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:16,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:55:16,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 00:55:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:55:16,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:55:16,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:55:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108140357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:16,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 00:55:16,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7, 7, 7] total 13 [2021-11-07 00:55:16,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030016495] [2021-11-07 00:55:16,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:55:16,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:55:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:55:16,512 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:16,655 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-11-07 00:55:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:55:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 22 [2021-11-07 00:55:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:16,658 INFO L225 Difference]: With dead ends: 49 [2021-11-07 00:55:16,658 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 00:55:16,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:55:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 00:55:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-11-07 00:55:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-07 00:55:16,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-11-07 00:55:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:16,669 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-07 00:55:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-07 00:55:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 00:55:16,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:16,671 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:16,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:16,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:17,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-07 00:55:17,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:17,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash -187943454, now seen corresponding path program 1 times [2021-11-07 00:55:17,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:17,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848840575] [2021-11-07 00:55:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:17,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:17,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:17,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:17,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:55:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:55:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:55:17,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:55:18,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:18,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848840575] [2021-11-07 00:55:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848840575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:18,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [81623472] [2021-11-07 00:55:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:18,101 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:18,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:18,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:18,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 00:55:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:55:18,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:55:18,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:55:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [81623472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:18,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713647417] [2021-11-07 00:55:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:18,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:55:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:18,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:55:18,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 00:55:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:55:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:55:19,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:55:19,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713647417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:19,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:55:19,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 6] total 17 [2021-11-07 00:55:19,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619543314] [2021-11-07 00:55:19,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 00:55:19,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 00:55:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-11-07 00:55:19,359 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:20,020 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2021-11-07 00:55:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 00:55:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 28 [2021-11-07 00:55:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:20,029 INFO L225 Difference]: With dead ends: 107 [2021-11-07 00:55:20,029 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 00:55:20,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-11-07 00:55:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 00:55:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-11-07 00:55:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-07 00:55:20,059 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 28 [2021-11-07 00:55:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:20,059 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-07 00:55:20,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-07 00:55:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 00:55:20,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:20,065 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:20,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:20,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:20,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 00:55:20,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:20,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 1 times [2021-11-07 00:55:20,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:20,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88931474] [2021-11-07 00:55:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:20,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:20,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:20,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:20,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:55:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 00:55:21,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-11-07 00:55:22,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:22,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:22,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-11-07 00:55:22,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:22,273 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-11-07 00:55:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-11-07 00:55:22,457 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-07 00:55:22,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-11-07 00:55:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:22,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:26,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-07 00:55:26,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 00:55:26,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-11-07 00:55:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-11-07 00:55:26,918 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 00:55:26,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-11-07 00:55:27,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:27,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88931474] [2021-11-07 00:55:27,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-11-07 00:55:27,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [530420141] [2021-11-07 00:55:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:27,597 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:27,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:55:27,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:55:27,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 00:55:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 00:55:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:28,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 00:55:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:28,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-11-07 00:55:28,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:28,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:55:28,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-11-07 00:55:28,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:28,825 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-11-07 00:55:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-11-07 00:55:28,907 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-07 00:55:28,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-11-07 00:55:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:29,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:41,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2021-11-07 00:55:41,973 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 00:55:41,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 724 treesize of output 596 [2021-11-07 00:55:45,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-11-07 00:55:45,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550951765] [2021-11-07 00:55:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:45,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:55:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:45,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:55:45,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 00:55:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:46,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 00:55:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:46,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 00:55:46,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 00:55:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:46,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-11-07 00:55:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:47,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:55:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:55:47,073 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 00:55:47,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 59 [2021-11-07 00:55:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:47,732 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-11-07 00:55:47,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-11-07 00:55:47,791 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-07 00:55:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-11-07 00:55:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:56:10,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550951765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:10,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:10,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2021-11-07 00:56:10,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60297703] [2021-11-07 00:56:10,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 00:56:10,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 00:56:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2536, Unknown=2, NotChecked=0, Total=2862 [2021-11-07 00:56:10,672 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:42,417 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-11-07 00:56:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 00:56:42,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 00:56:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:42,420 INFO L225 Difference]: With dead ends: 116 [2021-11-07 00:56:42,420 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 00:56:42,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=1053, Invalid=6601, Unknown=2, NotChecked=0, Total=7656 [2021-11-07 00:56:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 00:56:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2021-11-07 00:56:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-07 00:56:42,435 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 30 [2021-11-07 00:56:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:42,436 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-07 00:56:42,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-07 00:56:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 00:56:42,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:42,438 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:42,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:42,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:42,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:43,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:43,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2076320282, now seen corresponding path program 2 times [2021-11-07 00:56:43,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:43,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534142458] [2021-11-07 00:56:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:56:43,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:43,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:43,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:56:43,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:56:43,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:56:43,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:56:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:43,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:44,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:44,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534142458] [2021-11-07 00:56:44,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534142458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:44,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [859095321] [2021-11-07 00:56:44,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:56:44,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:44,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:44,208 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:44,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 00:56:44,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:56:44,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:56:44,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:56:44,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:44,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:45,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [859095321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:45,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059791136] [2021-11-07 00:56:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:56:45,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:45,277 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 00:56:45,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:56:45,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:56:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:56:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 00:56:45,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 00:56:46,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059791136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:46,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:56:46,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 8, 10] total 41 [2021-11-07 00:56:46,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590693119] [2021-11-07 00:56:46,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 00:56:46,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 00:56:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 00:56:46,735 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:49,781 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-11-07 00:56:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 00:56:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 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 36 [2021-11-07 00:56:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:49,784 INFO L225 Difference]: With dead ends: 132 [2021-11-07 00:56:49,784 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 00:56:49,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=798, Invalid=2984, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 00:56:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 00:56:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 69. [2021-11-07 00:56:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-07 00:56:49,799 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 36 [2021-11-07 00:56:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:49,799 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-07 00:56:49,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-07 00:56:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 00:56:49,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:49,801 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:49,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:50,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:50,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:50,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -284921254, now seen corresponding path program 3 times [2021-11-07 00:56:50,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:50,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183911244] [2021-11-07 00:56:50,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:56:50,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:50,405 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:50,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:56:51,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 00:56:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:56:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 00:56:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:51,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:51,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:51,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2021-11-07 00:56:52,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:56:52,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:56:52,226 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 00:56:52,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-11-07 00:56:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:56:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-11-07 00:56:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:52,839 INFO L354 Elim1Store]: treesize reduction 72, result has 37.9 percent of original size [2021-11-07 00:56:52,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 81 [2021-11-07 00:56:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:54,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:56:54,412 INFO L354 Elim1Store]: treesize reduction 16, result has 70.4 percent of original size [2021-11-07 00:56:54,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 118 [2021-11-07 00:57:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:57:02,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:21,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 252 [2021-11-07 00:57:21,473 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-07 00:57:21,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30011896 treesize of output 1 [2021-11-07 00:57:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:57:21,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:21,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183911244] [2021-11-07 00:57:21,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183911244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:21,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106124870] [2021-11-07 00:57:21,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:57:21,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:21,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:21,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:21,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 00:57:22,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 00:57:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:57:22,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 00:57:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:22,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 00:57:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:22,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:22,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2021-11-07 00:57:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:23,034 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 00:57:23,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-11-07 00:57:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-11-07 00:57:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:23,610 INFO L354 Elim1Store]: treesize reduction 72, result has 37.9 percent of original size [2021-11-07 00:57:23,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 81 [2021-11-07 00:57:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:24,717 INFO L354 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2021-11-07 00:57:24,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 114 [2021-11-07 00:57:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:57:39,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:57:40,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [106124870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:40,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605636725] [2021-11-07 00:57:40,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:57:40,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:40,911 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:57:40,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 00:57:42,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 00:57:42,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:57:42,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 00:57:42,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:43,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:43,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2021-11-07 00:57:46,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:46,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:46,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:46,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:46,729 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 00:57:46,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-11-07 00:57:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:47,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:47,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-11-07 00:57:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:47,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:48,049 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-07 00:57:48,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 75 [2021-11-07 00:57:49,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:49,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:49,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:49,904 INFO L354 Elim1Store]: treesize reduction 3, result has 70.0 percent of original size [2021-11-07 00:57:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 74 [2021-11-07 00:57:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:57:50,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:00,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 252 [2021-11-07 00:58:00,812 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-07 00:58:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3776632 treesize of output 1 [2021-11-07 00:58:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 00:58:00,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605636725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:00,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:58:00,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25, 24, 27, 26] total 72 [2021-11-07 00:58:00,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950024022] [2021-11-07 00:58:00,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 00:58:00,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 00:58:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=4744, Unknown=6, NotChecked=0, Total=5112 [2021-11-07 00:58:00,837 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:17,869 WARN L207 SmtUtils]: Spent 16.41 s on a formula simplification. DAG size of input: 153 DAG size of output: 114 [2021-11-07 00:58:45,752 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 166 DAG size of output: 147 [2021-11-07 00:59:27,715 WARN L207 SmtUtils]: Spent 20.92 s on a formula simplification. DAG size of input: 147 DAG size of output: 130 [2021-11-07 01:00:05,762 WARN L207 SmtUtils]: Spent 12.55 s on a formula simplification. DAG size of input: 143 DAG size of output: 127 [2021-11-07 01:02:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:05,980 INFO L93 Difference]: Finished difference Result 198 states and 222 transitions. [2021-11-07 01:02:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 01:02:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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 40 [2021-11-07 01:02:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:05,984 INFO L225 Difference]: With dead ends: 198 [2021-11-07 01:02:05,985 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 01:02:05,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 158 SyntacticMatches, 9 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 5052 ImplicationChecksByTransitivity, 195.5s TimeCoverageRelationStatistics Valid=1458, Invalid=14789, Unknown=9, NotChecked=0, Total=16256 [2021-11-07 01:02:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 01:02:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-11-07 01:02:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-11-07 01:02:06,017 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 40 [2021-11-07 01:02:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:06,018 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-11-07 01:02:06,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-11-07 01:02:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:02:06,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:06,021 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:06,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:06,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:06,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:06,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:06,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash -965020778, now seen corresponding path program 4 times [2021-11-07 01:02:06,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:06,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919121806] [2021-11-07 01:02:06,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:02:06,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:06,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:06,630 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:06,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:02:07,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:02:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:02:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:02:07,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:02:08,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:08,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919121806] [2021-11-07 01:02:08,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919121806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:08,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688541018] [2021-11-07 01:02:08,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:02:08,433 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:02:08,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:02:08,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:02:09,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:02:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:02:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:02:09,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:02:09,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688541018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:09,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768550178] [2021-11-07 01:02:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:02:09,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:02:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:02:09,890 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:02:09,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 01:02:10,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:02:10,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:10,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:02:10,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:02:11,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:02:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768550178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:11,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:02:11,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 14, 10] total 27 [2021-11-07 01:02:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120415935] [2021-11-07 01:02:11,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 01:02:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 01:02:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:02:11,595 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:14,646 INFO L93 Difference]: Finished difference Result 163 states and 180 transitions. [2021-11-07 01:02:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 01:02:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 44 [2021-11-07 01:02:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:14,648 INFO L225 Difference]: With dead ends: 163 [2021-11-07 01:02:14,648 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 01:02:14,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 01:02:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 01:02:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-11-07 01:02:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-11-07 01:02:14,668 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 44 [2021-11-07 01:02:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:14,669 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-11-07 01:02:14,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-11-07 01:02:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:02:14,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:14,671 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:14,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:14,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 01:02:15,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:15,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:15,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -858696042, now seen corresponding path program 5 times [2021-11-07 01:02:15,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:15,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207400814] [2021-11-07 01:02:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:02:15,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:15,282 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:15,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:02:16,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 01:02:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:16,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:02:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 01:02:16,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 01:02:18,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:18,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207400814] [2021-11-07 01:02:18,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207400814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:18,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1821680887] [2021-11-07 01:02:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:02:18,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:02:18,169 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:02:18,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:02:19,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:02:19,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260705948] [2021-11-07 01:02:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:02:19,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:02:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:02:19,133 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:02:19,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 1 [2021-11-07 01:02:19,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:02:20,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 01:02:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:20,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:02:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:02:20,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:02:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260705948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:22,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:02:22,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 9, 11] total 39 [2021-11-07 01:02:22,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368479878] [2021-11-07 01:02:22,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 01:02:22,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 01:02:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:02:22,314 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:32,144 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-11-07 01:02:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 01:02:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 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 48 [2021-11-07 01:02:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:32,147 INFO L225 Difference]: With dead ends: 196 [2021-11-07 01:02:32,148 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 01:02:32,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1195, Invalid=4811, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 01:02:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 01:02:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2021-11-07 01:02:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-11-07 01:02:32,177 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 48 [2021-11-07 01:02:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:32,177 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-11-07 01:02:32,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-11-07 01:02:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:02:32,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:32,179 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:32,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:32,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 01:02:32,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:02:32,590 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash 928954356, now seen corresponding path program 6 times [2021-11-07 01:02:32,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:32,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353956628] [2021-11-07 01:02:32,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:02:32,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:32,592 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:32,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05234aa-f88d-40a0-9496-a77c582b520e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:02:33,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 01:02:33,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:33,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 01:02:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:35,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:35,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2021-11-07 01:02:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,024 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-07 01:02:37,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2021-11-07 01:02:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:37,564 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-11-07 01:02:37,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 97 [2021-11-07 01:02:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:02:38,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 66 [2021-11-07 01:02:38,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:38,603 INFO L354 Elim1Store]: treesize reduction 131, result has 16.6 percent of original size [2021-11-07 01:02:38,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 76 [2021-11-07 01:02:40,035 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-07 01:02:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 52 [2021-11-07 01:02:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:40,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:16,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 93 [2021-11-07 01:03:16,072 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:03:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4138 treesize of output 1 [2021-11-07 01:03:16,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 721 treesize of output 561 [2021-11-07 01:03:17,784 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:03:17,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 17046084964 treesize of output 10544790884