./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-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_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/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_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/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_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/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 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:56:23,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:56:23,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:56:23,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:56:23,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:56:23,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:56:23,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:56:23,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:56:23,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:56:23,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:56:23,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:56:23,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:56:23,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:56:23,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:56:23,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:56:23,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:56:23,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:56:23,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:56:23,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:56:23,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:56:23,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:56:23,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:56:23,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:56:23,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:56:23,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:56:23,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:56:23,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:56:23,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:56:23,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:56:23,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:56:23,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:56:23,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:56:23,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:56:23,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:56:23,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:56:23,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:56:23,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:56:23,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:56:23,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:56:23,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:56:23,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:56:23,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:56:23,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:56:23,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:56:23,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:56:23,623 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:56:23,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:56:23,624 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:56:23,624 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:56:23,625 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:56:23,625 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:56:23,625 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:56:23,625 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:56:23,626 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:56:23,626 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:56:23,626 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:56:23,626 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:56:23,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:56:23,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:56:23,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:56:23,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:56:23,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:56:23,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:56:23,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:56:23,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:56:23,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:56:23,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:56:23,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:56:23,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:56:23,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:56:23,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:56:23,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:56:23,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:23,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:56:23,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:56:23,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:56:23,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:56:23,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:56:23,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:56:23,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:56:23,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:56:23,634 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_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f [2021-11-07 00:56:24,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:56:24,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:56:24,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:56:24,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:56:24,051 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:56:24,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2021-11-07 00:56:24,143 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/data/16ee26a16/86608bfbd2da46e38cbdc8b1df185305/FLAGd08db39a1 [2021-11-07 00:56:24,721 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:56:24,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2021-11-07 00:56:24,729 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/data/16ee26a16/86608bfbd2da46e38cbdc8b1df185305/FLAGd08db39a1 [2021-11-07 00:56:25,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/data/16ee26a16/86608bfbd2da46e38cbdc8b1df185305 [2021-11-07 00:56:25,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:56:25,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:56:25,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:25,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:56:25,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:56:25,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7559ef01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25, skipping insertion in model container [2021-11-07 00:56:25,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:56:25,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:25,376 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_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2021-11-07 00:56:25,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:25,410 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:56:25,426 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_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2021-11-07 00:56:25,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:25,454 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:56:25,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25 WrapperNode [2021-11-07 00:56:25,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:25,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:25,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:56:25,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:56:25,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:25,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:56:25,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:56:25,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:56:25,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:56:25,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:56:25,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:56:25,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:56:25,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (1/1) ... [2021-11-07 00:56:25,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:25,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:56:25,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:56:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:56:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:56:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:56:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:56:26,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:56:26,076 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 00:56:26,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:26 BoogieIcfgContainer [2021-11-07 00:56:26,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:56:26,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:56:26,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:56:26,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:56:26,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:56:25" (1/3) ... [2021-11-07 00:56:26,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309fb6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:26, skipping insertion in model container [2021-11-07 00:56:26,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:25" (2/3) ... [2021-11-07 00:56:26,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309fb6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:26, skipping insertion in model container [2021-11-07 00:56:26,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:26" (3/3) ... [2021-11-07 00:56:26,107 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.c [2021-11-07 00:56:26,113 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:56:26,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 00:56:26,213 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:56:26,221 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:56:26,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 00:56:26,240 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 00:56:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 00:56:26,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:26,247 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 00:56:26,248 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 00:56:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2021-11-07 00:56:26,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:26,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774890729] [2021-11-07 00:56:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:26,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:26,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:26,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774890729] [2021-11-07 00:56:26,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774890729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:26,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:26,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 00:56:26,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018594498] [2021-11-07 00:56:26,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:56:26,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:56:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:26,567 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 00:56:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:26,581 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-07 00:56:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:56:26,583 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 00:56:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:26,604 INFO L225 Difference]: With dead ends: 33 [2021-11-07 00:56:26,605 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 00:56:26,608 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 00:56:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 00:56:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 00:56:26,644 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 00:56:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 00:56:26,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-11-07 00:56:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:26,647 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 00:56:26,648 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 00:56:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 00:56:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 00:56:26,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:26,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 00:56:26,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:56:26,650 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 00:56:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2021-11-07 00:56:26,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:26,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601301041] [2021-11-07 00:56:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:26,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:26,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:26,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366307607] [2021-11-07 00:56:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:26,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:26,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:26,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:26,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 00:56:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:56:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:54,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:54,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601301041] [2021-11-07 00:57:54,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:57:54,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366307607] [2021-11-07 00:57:54,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366307607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:54,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:54,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:54,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321805077] [2021-11-07 00:57:54,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:57:54,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:57:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-07 00:57:54,022 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 00:57:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:54,881 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-07 00:57:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:57:54,882 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 00:57:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:54,883 INFO L225 Difference]: With dead ends: 26 [2021-11-07 00:57:54,883 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 00:57:54,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.4s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-11-07 00:57:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 00:57:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 00:57:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 00:57:54,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-11-07 00:57:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:54,891 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 00:57:54,891 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 00:57:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 00:57:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 00:57:54,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:54,892 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:54,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:55,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-07 00:57:55,094 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 00:57:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2021-11-07 00:57:55,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:55,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014151093] [2021-11-07 00:57:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:55,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:55,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:57:55,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151316171] [2021-11-07 00:57:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:55,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:55,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:57:55,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 00:57:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:57:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:55,262 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 00:57:55,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:55,332 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 00:57:55,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:55,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014151093] [2021-11-07 00:57:55,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:57:55,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151316171] [2021-11-07 00:57:55,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151316171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:55,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519831488] [2021-11-07 00:57:55,394 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 00:57:55,397 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:57:55,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:57:55,416 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:57:55,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:57:55,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,493 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:57:55,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 00:57:55,506 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:57:55,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:57:55,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 00:57:55,564 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-07 00:57:55,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,610 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 00:57:55,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:57:55,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:57:55,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:57:55,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 00:57:55,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:57:55,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:57:55,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:57:55,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:55,787 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 00:57:55,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:57:55,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:57:55,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 00:57:55,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,822 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 00:57:55,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 00:57:55,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:57:55,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 00:57:55,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 00:57:55,853 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-11-07 00:57:55,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-07 00:57:55,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-11-07 00:57:55,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:55,971 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:57:55,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:57:55,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:55,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:57:55,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:56,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-07 00:57:56,011 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:57:56,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:57:56,020 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 00:57:56,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 00:57:56,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:56,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 00:57:56,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:56,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:57:56,064 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:57:57,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:57:57,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:57,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-07 00:57:57,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992540527] [2021-11-07 00:57:57,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:57,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 00:57:57,414 INFO L87 Difference]: Start difference. First operand 15 states and 16 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 00:57:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:57,505 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-11-07 00:57:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 00:57:57,506 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 00:57:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:57,507 INFO L225 Difference]: With dead ends: 43 [2021-11-07 00:57:57,507 INFO L226 Difference]: Without dead ends: 37 [2021-11-07 00:57:57,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:57:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-07 00:57:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-11-07 00:57:57,522 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 00:57:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-07 00:57:57,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2021-11-07 00:57:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:57,532 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-07 00:57:57,533 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 00:57:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-07 00:57:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 00:57:57,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:57,535 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:57,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 00:57:57,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:57,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1671355727, now seen corresponding path program 1 times [2021-11-07 00:57:57,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:57,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366048400] [2021-11-07 00:57:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:57,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:57,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:57:57,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722884920] [2021-11-07 00:57:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:57,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:57,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:57,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:57:57,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 00:57:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 00:57:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:58,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:58,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:58,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366048400] [2021-11-07 00:57:58,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:57:58,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722884920] [2021-11-07 00:57:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722884920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:58,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261199457] [2021-11-07 00:57:58,384 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 00:57:58,384 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:57:58,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:57:58,385 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:57:58,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:57:58,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,397 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:57:58,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:57:58,399 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:57:58,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 00:57:58,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 00:57:58,411 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-07 00:57:58,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 00:57:58,421 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:57:58,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,422 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:57:58,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:57:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,437 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 00:57:58,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:57:58,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:57:58,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:57:58,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:58,476 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 00:57:58,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:57:58,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:57:58,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 00:57:58,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,494 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 00:57:58,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 00:57:58,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:57:58,498 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 00:57:58,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 00:57:58,514 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-11-07 00:57:58,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-07 00:57:58,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-11-07 00:57:58,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:57:58,588 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:57:58,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:57:58,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:57:58,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-07 00:57:58,620 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:57:58,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:57:58,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:57:58,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-07 00:57:58,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:57:58,670 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 00:57:58,676 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:57:59,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:57:59,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:59,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 00:57:59,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893849391] [2021-11-07 00:57:59,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:57:59,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:57:59,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:57:59,972 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 00:58:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:00,758 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-07 00:58:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 00:58:00,760 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 00:58:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:00,760 INFO L225 Difference]: With dead ends: 41 [2021-11-07 00:58:00,761 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 00:58:00,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:58:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 00:58:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 00:58:00,769 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 00:58:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-07 00:58:00,770 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 14 [2021-11-07 00:58:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:00,771 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-07 00:58:00,771 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 00:58:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-07 00:58:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 00:58:00,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:00,774 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:00,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:00,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:00,999 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 00:58:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:01,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1946776116, now seen corresponding path program 2 times [2021-11-07 00:58:01,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:01,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908386324] [2021-11-07 00:58:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:01,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:01,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:58:01,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858149634] [2021-11-07 00:58:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:58:01,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:01,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:01,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:58:01,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 00:58:01,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 00:58:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:58:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:58:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:01,440 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 00:58:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:01,602 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 00:58:01,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:01,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908386324] [2021-11-07 00:58:01,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:01,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858149634] [2021-11-07 00:58:01,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858149634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:01,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248184794] [2021-11-07 00:58:01,607 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 00:58:01,608 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:58:01,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:58:01,609 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:58:01,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:58:01,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,626 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:01,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 00:58:01,628 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:01,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:58:01,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 00:58:01,644 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-07 00:58:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,675 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 00:58:01,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:01,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:01,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:01,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 00:58:01,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,693 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:01,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:01,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:01,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:01,734 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 00:58:01,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:01,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:01,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:01,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,752 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 00:58:01,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 00:58:01,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:58:01,758 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 00:58:01,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 00:58:01,776 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-11-07 00:58:01,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-07 00:58:01,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,816 INFO L185 QuantifierPusher]: treesize reduction 76, result has 72.6 percent of original size 201 [2021-11-07 00:58:01,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-11-07 00:58:01,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-11-07 00:58:01,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:01,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-11-07 00:58:01,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:01,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:02,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:02,016 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:02,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:02,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:02,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:02,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:02,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-07 00:58:02,047 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:02,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:02,053 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 00:58:02,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 00:58:02,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:02,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 00:58:02,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:02,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:02,090 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:58:03,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:03,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-07 00:58:03,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022581142] [2021-11-07 00:58:03,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 00:58:03,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 00:58:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:58:03,267 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 00:58:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:03,496 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-11-07 00:58:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 00:58:03,497 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 00:58:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:03,498 INFO L225 Difference]: With dead ends: 85 [2021-11-07 00:58:03,498 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 00:58:03,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-11-07 00:58:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 00:58:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-11-07 00:58:03,522 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 00:58:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-07 00:58:03,525 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2021-11-07 00:58:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:03,526 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-07 00:58:03,529 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 00:58:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-07 00:58:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 00:58:03,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:03,531 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:03,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:03,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:03,737 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 00:58:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 147972461, now seen corresponding path program 2 times [2021-11-07 00:58:03,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:03,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558940552] [2021-11-07 00:58:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:03,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:03,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:58:03,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159425952] [2021-11-07 00:58:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:58:03,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:03,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:03,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:58:03,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 00:58:04,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 00:58:04,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:58:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 00:58:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:04,687 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 00:58:04,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:05,757 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 00:58:05,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:05,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558940552] [2021-11-07 00:58:05,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:05,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159425952] [2021-11-07 00:58:05,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159425952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:05,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846330978] [2021-11-07 00:58:05,762 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 00:58:05,762 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:58:05,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:58:05,762 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:58:05,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:58:05,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,771 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:05,771 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 00:58:05,773 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:05,773 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:58:05,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 00:58:05,781 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-07 00:58:05,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 00:58:05,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:05,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:05,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:05,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,805 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 00:58:05,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:05,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:05,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:05,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:05,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:05,839 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 00:58:05,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:05,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:05,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:05,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:05,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,854 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 00:58:05,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 00:58:05,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:58:05,857 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 00:58:05,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 00:58:05,870 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-11-07 00:58:05,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-07 00:58:05,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:05,904 INFO L185 QuantifierPusher]: treesize reduction 8, result has 94.4 percent of original size 134 [2021-11-07 00:58:05,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:05,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:05,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:05,983 INFO L180 QuantifierPusher]: treesize reduction 5, result has 98.5 percent of original size [2021-11-07 00:58:05,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 325 [2021-11-07 00:58:05,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 422 [2021-11-07 00:58:06,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 556 [2021-11-07 00:58:06,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:06,129 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:06,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:06,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:06,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-07 00:58:06,175 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:06,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:06,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:06,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-07 00:58:06,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:06,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 00:58:06,223 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:58:07,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:07,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:07,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-07 00:58:07,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755711495] [2021-11-07 00:58:07,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 00:58:07,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:07,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 00:58:07,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:58:07,462 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 00:58:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:11,039 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-07 00:58:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 00:58:11,040 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 00:58:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:11,042 INFO L225 Difference]: With dead ends: 59 [2021-11-07 00:58:11,042 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 00:58:11,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-07 00:58:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 00:58:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 00:58:11,058 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 00:58:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-07 00:58:11,060 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 26 [2021-11-07 00:58:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:11,060 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-07 00:58:11,060 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 00:58:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-07 00:58:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 00:58:11,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:11,063 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:11,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 00:58:11,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 00:58:11,270 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 00:58:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:11,271 INFO L85 PathProgramCache]: Analyzing trace with hash -307052628, now seen corresponding path program 3 times [2021-11-07 00:58:11,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:11,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598475074] [2021-11-07 00:58:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:11,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:11,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:58:11,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794411451] [2021-11-07 00:58:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 00:58:11,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:11,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:58:11,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 00:58:11,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 00:58:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:58:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 00:58:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:11,856 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 00:58:11,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:12,283 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 00:58:12,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:12,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598475074] [2021-11-07 00:58:12,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:12,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794411451] [2021-11-07 00:58:12,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794411451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:12,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764076403] [2021-11-07 00:58:12,287 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 00:58:12,287 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:58:12,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:58:12,287 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:58:12,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:58:12,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,296 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:12,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:58:12,298 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:12,299 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 00:58:12,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 00:58:12,306 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-11-07 00:58:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,328 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 00:58:12,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:12,330 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:12,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:12,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 00:58:12,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:12,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:12,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:12,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:12,375 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 00:58:12,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:12,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:12,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:12,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,390 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 00:58:12,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 00:58:12,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:58:12,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 00:58:12,396 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 00:58:12,404 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-11-07 00:58:12,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-07 00:58:12,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,422 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-11-07 00:58:12,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-11-07 00:58:12,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-11-07 00:58:12,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-11-07 00:58:12,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:12,560 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:12,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:12,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:12,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-07 00:58:12,584 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:12,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:12,589 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 00:58:12,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 00:58:12,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 00:58:12,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:12,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:12,618 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:58:13,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:13,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:13,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-07 00:58:13,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158362291] [2021-11-07 00:58:13,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 00:58:13,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 00:58:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 00:58:13,726 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 00:58:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:14,307 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-07 00:58:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 00:58:14,314 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 00:58:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:14,316 INFO L225 Difference]: With dead ends: 103 [2021-11-07 00:58:14,316 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 00:58:14,318 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 00:58:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 00:58:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-07 00:58:14,367 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 00:58:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-11-07 00:58:14,369 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 48 [2021-11-07 00:58:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:14,369 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-11-07 00:58:14,369 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 00:58:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-11-07 00:58:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:58:14,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:14,378 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:14,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:14,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:14,599 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 00:58:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 161784476, now seen corresponding path program 4 times [2021-11-07 00:58:14,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:14,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528052767] [2021-11-07 00:58:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:14,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:14,622 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:58:14,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172048941] [2021-11-07 00:58:14,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 00:58:14,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:14,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:58:14,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 00:58:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:14,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 00:58:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:15,649 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 00:58:15,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:16,786 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 00:58:16,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:16,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528052767] [2021-11-07 00:58:16,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:16,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172048941] [2021-11-07 00:58:16,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172048941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:16,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017454350] [2021-11-07 00:58:16,789 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-07 00:58:16,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 00:58:16,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 00:58:16,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 00:58:16,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 00:58:16,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,797 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:16,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 00:58:16,799 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 00:58:16,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 00:58:16,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 00:58:16,807 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-11-07 00:58:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,828 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 00:58:16,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:16,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 00:58:16,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:16,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 00:58:16,838 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:16,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 00:58:16,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:16,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:16,869 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 00:58:16,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:16,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 00:58:16,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 00:58:16,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,884 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-11-07 00:58:16,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-07 00:58:16,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 00:58:16,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-11-07 00:58:16,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-07 00:58:16,899 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-11-07 00:58:16,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-07 00:58:16,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-11-07 00:58:16,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:16,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-11-07 00:58:16,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:16,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-11-07 00:58:16,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:17,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-11-07 00:58:17,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 00:58:17,059 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:17,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:17,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:17,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:17,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:17,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-07 00:58:17,092 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-07 00:58:17,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 00:58:17,098 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-11-07 00:58:17,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 00:58:17,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:17,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 00:58:17,121 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:58:17,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-11-07 00:58:17,127 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 00:58:18,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:58:18,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:18,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-07 00:58:18,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491857897] [2021-11-07 00:58:18,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 00:58:18,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 00:58:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=2256, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 00:58:18,352 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 00:58:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:20,059 INFO L93 Difference]: Finished difference Result 199 states and 222 transitions. [2021-11-07 00:58:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 00:58:20,060 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 00:58:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:20,065 INFO L225 Difference]: With dead ends: 199 [2021-11-07 00:58:20,066 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 00:58:20,075 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 00:58:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 00:58:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-07 00:58:20,154 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 00:58:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-11-07 00:58:20,163 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 96 [2021-11-07 00:58:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:20,167 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-11-07 00:58:20,167 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 00:58:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-11-07 00:58:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 00:58:20,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:20,172 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:20,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:20,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-07 00:58:20,373 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 00:58:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1306163076, now seen corresponding path program 5 times [2021-11-07 00:58:20,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:20,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542679451] [2021-11-07 00:58:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:20,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:20,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:58:20,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437980036] [2021-11-07 00:58:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:58:20,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:20,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:58:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10efcc08-fe4d-47ac-8a22-2c723b9fd2b7/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process