./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/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_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/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_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/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 a70bdaebce973cfb63a6da68866c665cdef037b6b862a38db5ed10fbf681a6e5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:11,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:11,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:11,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:11,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:11,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:11,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:11,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:11,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:11,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:11,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:11,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:11,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:11,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:11,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:11,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:11,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:11,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:11,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:11,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:11,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:11,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:11,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:11,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:11,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:11,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:11,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:11,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:11,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:11,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:11,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:11,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:11,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:11,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:11,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:11,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:11,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:11,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:11,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:11,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:11,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:11,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:44:11,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:11,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:11,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:11,528 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:11,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:11,529 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:11,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:11,529 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:11,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:11,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:11,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:11,531 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:11,532 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:11,532 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:11,532 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:11,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:11,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:11,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:11,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:11,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:11,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:11,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:11,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:11,535 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:11,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:11,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:11,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:11,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:11,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:11,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:11,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:11,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:11,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:11,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:11,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:11,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:11,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:11,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:11,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:11,540 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_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70bdaebce973cfb63a6da68866c665cdef037b6b862a38db5ed10fbf681a6e5 [2021-11-07 01:44:11,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:11,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:11,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:11,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:11,841 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:11,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2021-11-07 01:44:11,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/data/8b6694a8d/22a57bacac7641349725aefdb4f36bfe/FLAG3ee07d3bd [2021-11-07 01:44:12,325 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:12,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2021-11-07 01:44:12,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/data/8b6694a8d/22a57bacac7641349725aefdb4f36bfe/FLAG3ee07d3bd [2021-11-07 01:44:12,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/data/8b6694a8d/22a57bacac7641349725aefdb4f36bfe [2021-11-07 01:44:12,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:12,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:12,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:12,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:12,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:12,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:12" (1/1) ... [2021-11-07 01:44:12,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774f927b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:12, skipping insertion in model container [2021-11-07 01:44:12,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:12" (1/1) ... [2021-11-07 01:44:12,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:12,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:12,934 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_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c[458,471] [2021-11-07 01:44:12,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:12,967 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:12,986 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_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c[458,471] [2021-11-07 01:44:12,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:13,007 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:13,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13 WrapperNode [2021-11-07 01:44:13,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:13,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:13,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:13,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:13,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:13,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:13,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:13,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:13,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:13,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:13,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:13,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:13,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:13,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:44:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:13,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:13,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:13,416 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 01:44:13,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:13 BoogieIcfgContainer [2021-11-07 01:44:13,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:13,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:13,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:13,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:13,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:12" (1/3) ... [2021-11-07 01:44:13,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c89228e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:13, skipping insertion in model container [2021-11-07 01:44:13,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (2/3) ... [2021-11-07 01:44:13,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c89228e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:13, skipping insertion in model container [2021-11-07 01:44:13,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:13" (3/3) ... [2021-11-07 01:44:13,426 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound50.c [2021-11-07 01:44:13,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:13,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 01:44:13,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:13,488 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:44:13,488 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 01:44:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 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 01:44:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:44:13,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:13,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:44:13,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2021-11-07 01:44:13,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:13,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845428163] [2021-11-07 01:44:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:13,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:13,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845428163] [2021-11-07 01:44:13,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845428163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:13,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:13,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:44:13,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275623207] [2021-11-07 01:44:13,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:13,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:13,718 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:13,733 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-07 01:44:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:44:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:13,750 INFO L225 Difference]: With dead ends: 33 [2021-11-07 01:44:13,750 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 01:44:13,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 01:44:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 01:44:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 01:44:13,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-11-07 01:44:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:13,784 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 01:44:13,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 01:44:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:44:13,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:13,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:44:13,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:44:13,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2021-11-07 01:44:13,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:13,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089551609] [2021-11-07 01:44:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:13,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:13,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297824003] [2021-11-07 01:44:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:13,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:13,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:44:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:44:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:14,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:14,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089551609] [2021-11-07 01:44:14,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:14,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297824003] [2021-11-07 01:44:14,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297824003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:14,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:14,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:14,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152240967] [2021-11-07 01:44:14,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:44:14,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:44:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:14,246 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:16,403 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-07 01:44:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:44:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:16,406 INFO L225 Difference]: With dead ends: 43 [2021-11-07 01:44:16,406 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 01:44:16,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 01:44:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-11-07 01:44:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 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 01:44:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-07 01:44:16,414 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2021-11-07 01:44:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-07 01:44:16,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-07 01:44:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:44:16,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:16,416 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:16,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 01:44:16,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:16,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:16,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2021-11-07 01:44:16,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:16,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549358146] [2021-11-07 01:44:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:16,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:16,629 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:16,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175103104] [2021-11-07 01:44:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:16,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:16,630 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:16,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:44:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:44:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:16,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:16,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549358146] [2021-11-07 01:44:16,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:16,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175103104] [2021-11-07 01:44:16,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175103104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:16,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713357204] [2021-11-07 01:44:16,837 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 01:44:16,837 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:16,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:16,848 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:16,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:16,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:16,921 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:16,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:16,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:16,926 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:16,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:16,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:16,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:16,998 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-07 01:44:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:17,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:17,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:17,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:17,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:17,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:17,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:17,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:17,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:17,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:17,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:17,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:17,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,179 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:17,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:17,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:17,184 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:17,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:17,218 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:17,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-07 01:44:17,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-07 01:44:17,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 334 [2021-11-07 01:44:17,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 411 [2021-11-07 01:44:17,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 520 [2021-11-07 01:44:17,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:17,598 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:17,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:17,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:17,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:17,628 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:17,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:17,635 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 01:44:17,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 01:44:17,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-07 01:44:17,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:17,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:17,677 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:21,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:21,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:21,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-07 01:44:21,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047130167] [2021-11-07 01:44:21,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:21,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:21,191 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) 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 01:44:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:21,284 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-11-07 01:44:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:44:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) 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 12 [2021-11-07 01:44:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:21,288 INFO L225 Difference]: With dead ends: 55 [2021-11-07 01:44:21,289 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 01:44:21,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 01:44:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-11-07 01:44:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-07 01:44:21,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2021-11-07 01:44:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:21,299 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-07 01:44:21,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) 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 01:44:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-07 01:44:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:44:21,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:21,300 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2021-11-07 01:44:21,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 01:44:21,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:21,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash -468451453, now seen corresponding path program 1 times [2021-11-07 01:44:21,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:21,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706996961] [2021-11-07 01:44:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:21,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:21,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:21,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859423344] [2021-11-07 01:44:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:21,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:21,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:21,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:44:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 01:44:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:21,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:44:22,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:22,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706996961] [2021-11-07 01:44:22,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:22,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859423344] [2021-11-07 01:44:22,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859423344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:22,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656457810] [2021-11-07 01:44:22,012 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-07 01:44:22,012 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:22,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:22,013 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:22,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:22,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,030 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:22,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:22,033 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:22,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:22,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:22,054 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-07 01:44:22,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:22,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:22,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:22,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:22,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:22,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:22,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:22,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:22,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:22,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:22,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:22,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,135 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:22,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:22,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:22,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:22,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:22,165 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:22,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-07 01:44:22,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-11-07 01:44:22,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:22,238 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:22,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:22,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:22,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:22,272 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:22,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:22,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:22,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:22,293 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:23,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:23,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:23,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-07 01:44:23,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072660533] [2021-11-07 01:44:23,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:44:23,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:44:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:44:23,042 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:24,649 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-07 01:44:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:44:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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 01:44:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:24,651 INFO L225 Difference]: With dead ends: 41 [2021-11-07 01:44:24,651 INFO L226 Difference]: Without dead ends: 37 [2021-11-07 01:44:24,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-07 01:44:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-11-07 01:44:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 01:44:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-07 01:44:24,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2021-11-07 01:44:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:24,670 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-07 01:44:24,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-07 01:44:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:44:24,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:24,671 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:24,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:24,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 01:44:24,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1671355727, now seen corresponding path program 1 times [2021-11-07 01:44:24,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:24,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078528531] [2021-11-07 01:44:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:24,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:24,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:24,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820329574] [2021-11-07 01:44:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:24,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:24,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:24,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:24,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:44:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:24,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:44:24,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:25,221 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 01:44:25,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:25,522 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 01:44:25,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:25,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078528531] [2021-11-07 01:44:25,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:25,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820329574] [2021-11-07 01:44:25,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820329574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:25,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249962673] [2021-11-07 01:44:25,525 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 01:44:25,526 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:25,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:25,526 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:25,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:25,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,540 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:25,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:25,542 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:25,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:25,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:25,551 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-07 01:44:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:25,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:25,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:25,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:25,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:25,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:25,590 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:25,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:25,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:25,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:25,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:25,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:25,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:25,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,635 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:25,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:25,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:25,638 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:25,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:25,648 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:25,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-11-07 01:44:25,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,667 INFO L185 QuantifierPusher]: treesize reduction 59, result has 76.3 percent of original size 190 [2021-11-07 01:44:25,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,708 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-11-07 01:44:25,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,720 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:25,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 316 [2021-11-07 01:44:25,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:25,789 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:25,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:25,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:25,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:25,820 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:25,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:25,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:25,838 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-11-07 01:44:25,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:25,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-07 01:44:25,867 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:27,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:27,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:27,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 01:44:27,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908423246] [2021-11-07 01:44:27,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:44:27,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:44:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:27,121 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:27,795 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-07 01:44:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:44:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 01:44:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:27,797 INFO L225 Difference]: With dead ends: 41 [2021-11-07 01:44:27,797 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 01:44:27,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 01:44:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 01:44:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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 01:44:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-07 01:44:27,804 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 14 [2021-11-07 01:44:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:27,804 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-07 01:44:27,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-07 01:44:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:44:27,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:27,805 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:27,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:28,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 01:44:28,006 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1946776116, now seen corresponding path program 2 times [2021-11-07 01:44:28,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:28,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767308315] [2021-11-07 01:44:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:28,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:28,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:28,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164713632] [2021-11-07 01:44:28,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:28,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:28,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:28,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:28,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:44:28,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:44:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:44:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:28,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767308315] [2021-11-07 01:44:28,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:28,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164713632] [2021-11-07 01:44:28,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164713632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:28,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116705361] [2021-11-07 01:44:28,809 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 01:44:28,809 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:28,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:28,810 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:28,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:28,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,819 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:28,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:28,821 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:28,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:28,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:28,829 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-07 01:44:28,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:28,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:28,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:28,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:28,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:28,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:28,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:28,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:28,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:28,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:28,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:28,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,909 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:28,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:28,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:28,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:28,914 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:28,923 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:28,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-11-07 01:44:28,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,936 INFO L185 QuantifierPusher]: treesize reduction 76, result has 72.1 percent of original size 196 [2021-11-07 01:44:28,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:28,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-11-07 01:44:28,984 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:28,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 316 [2021-11-07 01:44:29,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:29,048 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:29,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:29,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:29,058 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:29,070 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:29,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:29,081 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 01:44:29,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 01:44:29,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-07 01:44:29,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:29,110 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:30,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:30,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:30,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-07 01:44:30,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032782841] [2021-11-07 01:44:30,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:44:30,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:44:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:30,106 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:30,298 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-11-07 01:44:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:44:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:44:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:30,300 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:44:30,300 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 01:44:30,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:44:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 01:44:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-11-07 01:44:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-07 01:44:30,312 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2021-11-07 01:44:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:30,312 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-07 01:44:30,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-07 01:44:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:44:30,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:30,313 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:30,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:30,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 01:44:30,524 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash 147972461, now seen corresponding path program 2 times [2021-11-07 01:44:30,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:30,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549299420] [2021-11-07 01:44:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:30,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:30,543 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:30,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637047040] [2021-11-07 01:44:30,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:30,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:30,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:44:36,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:44:36,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:44:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:37,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:37,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:37,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549299420] [2021-11-07 01:44:37,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:37,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637047040] [2021-11-07 01:44:37,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637047040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:37,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464292061] [2021-11-07 01:44:37,858 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 01:44:37,858 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:37,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:37,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:37,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:37,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,865 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:37,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:37,866 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:37,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:37,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:37,883 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-11-07 01:44:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:37,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:37,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:37,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:37,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:37,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:37,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:37,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:37,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:37,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:37,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:37,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:37,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:37,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:37,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:37,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,959 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:37,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:37,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:37,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:37,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:37,970 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:37,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-07 01:44:37,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:37,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 278 [2021-11-07 01:44:37,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:38,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:38,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:38,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:38,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:38,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:38,017 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:38,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:38,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:38,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:38,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:38,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:38,037 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:38,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:38,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:38,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:38,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:38,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-11-07 01:44:38,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:38,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-07 01:44:38,079 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:39,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:39,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:39,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-07 01:44:39,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076289752] [2021-11-07 01:44:39,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:44:39,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:39,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:44:39,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:44:39,274 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:41,135 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-07 01:44:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:44:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 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 26 [2021-11-07 01:44:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:41,137 INFO L225 Difference]: With dead ends: 59 [2021-11-07 01:44:41,137 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 01:44:41,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:44:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 01:44:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 01:44:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-07 01:44:41,150 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 26 [2021-11-07 01:44:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-07 01:44:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-07 01:44:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:44:41,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:41,153 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:41,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:41,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:41,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash -307052628, now seen corresponding path program 3 times [2021-11-07 01:44:41,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:41,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138624396] [2021-11-07 01:44:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:41,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:41,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:41,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721099498] [2021-11-07 01:44:41,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:44:41,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:41,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:41,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:41,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:44:41,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:44:41,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:44:41,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:41,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:42,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138624396] [2021-11-07 01:44:42,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721099498] [2021-11-07 01:44:42,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721099498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341442605] [2021-11-07 01:44:42,300 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 01:44:42,300 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:42,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:42,300 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:42,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:42,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,312 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:42,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:42,314 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:42,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:42,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:42,323 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-11-07 01:44:42,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:42,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:42,356 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:42,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:42,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:42,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:42,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:42,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:42,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:42,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:42,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:42,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:42,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,412 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:42,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:42,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:42,414 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:42,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:42,428 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:42,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-07 01:44:42,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 278 [2021-11-07 01:44:42,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:42,478 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:42,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:42,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:42,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:42,503 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:42,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:42,507 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 01:44:42,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 01:44:42,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-07 01:44:42,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:42,532 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:43,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:43,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:43,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-07 01:44:43,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318001166] [2021-11-07 01:44:43,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:44:43,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:44:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:44:43,717 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:44,165 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-07 01:44:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 01:44:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 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 01:44:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:44,167 INFO L225 Difference]: With dead ends: 103 [2021-11-07 01:44:44,167 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 01:44:44,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=829, Invalid=2251, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 01:44:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 01:44:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-07 01:44:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-11-07 01:44:44,190 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 48 [2021-11-07 01:44:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-11-07 01:44:44,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-11-07 01:44:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:44:44,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:44,195 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:44,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:44,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:44,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 161784476, now seen corresponding path program 4 times [2021-11-07 01:44:44,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:44,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594706453] [2021-11-07 01:44:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:44,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:44,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:44,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998726267] [2021-11-07 01:44:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:44:44,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:44,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:44,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:44,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:44:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 01:44:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:45,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:46,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:46,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594706453] [2021-11-07 01:44:46,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:46,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998726267] [2021-11-07 01:44:46,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998726267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:46,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73025504] [2021-11-07 01:44:46,355 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 01:44:46,355 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:44:46,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:44:46,355 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:44:46,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:44:46,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,365 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:46,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:44:46,367 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:44:46,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:44:46,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:44:46,372 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 21=[|v_#valid_20|]} [2021-11-07 01:44:46,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:44:46,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:46,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:44:46,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:46,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:44:46,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:46,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:44:46,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:46,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:46,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:44:46,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:46,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:44:46,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:44:46,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,454 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 01:44:46,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 01:44:46,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:44:46,456 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 01:44:46,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 01:44:46,481 INFO L180 QuantifierPusher]: treesize reduction 19, result has 91.2 percent of original size [2021-11-07 01:44:46,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-11-07 01:44:46,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,498 INFO L185 QuantifierPusher]: treesize reduction 61, result has 75.7 percent of original size 190 [2021-11-07 01:44:46,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:44:46,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-11-07 01:44:46,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 311 [2021-11-07 01:44:46,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:44:46,611 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:46,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:46,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:46,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-11-07 01:44:46,630 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 01:44:46,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:44:46,634 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 01:44:46,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 01:44:46,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-07 01:44:46,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:46,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:44:46,662 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:44:47,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:47,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:47,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-07 01:44:47,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308336256] [2021-11-07 01:44:47,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 01:44:47,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 01:44:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=2256, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 01:44:47,971 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 50 states, 50 states have (on average 3.74) internal successors, (187), 49 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:49,634 INFO L93 Difference]: Finished difference Result 199 states and 222 transitions. [2021-11-07 01:44:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 01:44:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 49 states have internal predecessors, (187), 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 96 [2021-11-07 01:44:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:49,637 INFO L225 Difference]: With dead ends: 199 [2021-11-07 01:44:49,637 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 01:44:49,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3349, Invalid=7363, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 01:44:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 01:44:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-07 01:44:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-11-07 01:44:49,687 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 96 [2021-11-07 01:44:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:49,687 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-11-07 01:44:49,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 49 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-11-07 01:44:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 01:44:49,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:49,692 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:49,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:49,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1306163076, now seen corresponding path program 5 times [2021-11-07 01:44:49,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:49,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851770951] [2021-11-07 01:44:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:49,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:49,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:49,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560152795] [2021-11-07 01:44:49,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:44:49,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:49,952 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:49,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ba9fd78-4de8-49e6-903a-f63bbb3167b8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process