./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG --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 ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:38:49,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:38:49,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:38:49,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:38:49,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:38:49,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:38:49,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:38:49,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:38:49,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:38:49,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:38:49,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:38:49,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:38:49,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:38:49,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:38:49,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:38:49,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:38:49,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:38:49,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:38:49,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:38:49,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:38:49,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:38:49,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:38:49,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:38:49,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:38:49,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:38:49,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:38:49,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:38:49,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:38:49,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:38:49,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:38:49,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:38:49,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:38:49,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:38:49,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:38:49,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:38:49,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:38:49,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:38:49,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:38:49,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:38:49,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:38:49,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:38:49,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:38:49,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:38:49,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:38:49,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:38:49,581 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:38:49,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:38:49,581 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:38:49,582 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:38:49,582 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:38:49,582 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:38:49,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:38:49,584 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:38:49,584 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:38:49,584 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:38:49,584 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:38:49,585 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:38:49,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:38:49,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:38:49,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:38:49,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:38:49,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:38:49,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:38:49,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:38:49,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:38:49,588 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:38:49,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:38:49,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:38:49,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:38:49,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:38:49,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:38:49,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:38:49,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:38:49,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:38:49,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:38:49,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:38:49,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:38:49,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:38:49,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:38:49,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:38:49,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:38:49,593 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_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad [2021-10-29 05:38:49,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:38:49,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:38:49,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:38:49,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:38:49,911 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:38:49,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2021-10-29 05:38:49,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/data/e5e2461d7/60e0a7d4c0434ca3a14d30501ea0debf/FLAG5d9ce0d75 [2021-10-29 05:38:50,462 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:38:50,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2021-10-29 05:38:50,484 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/data/e5e2461d7/60e0a7d4c0434ca3a14d30501ea0debf/FLAG5d9ce0d75 [2021-10-29 05:38:50,823 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/data/e5e2461d7/60e0a7d4c0434ca3a14d30501ea0debf [2021-10-29 05:38:50,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:38:50,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:38:50,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:38:50,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:38:50,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:38:50,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:38:50" (1/1) ... [2021-10-29 05:38:50,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6679e27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:50, skipping insertion in model container [2021-10-29 05:38:50,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:38:50" (1/1) ... [2021-10-29 05:38:50,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:38:50,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:38:51,123 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_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2021-10-29 05:38:51,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:38:51,152 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:38:51,166 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_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2021-10-29 05:38:51,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:38:51,189 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:38:51,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51 WrapperNode [2021-10-29 05:38:51,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:38:51,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:38:51,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:38:51,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:38:51,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:38:51,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:38:51,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:38:51,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:38:51,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:38:51,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:38:51,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:38:51,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:38:51,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (1/1) ... [2021-10-29 05:38:51,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:38:51,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:38:51,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:38:51,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:38:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:38:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:38:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:38:51,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:38:51,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:38:51,822 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-29 05:38:51,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:38:51 BoogieIcfgContainer [2021-10-29 05:38:51,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:38:51,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:38:51,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:38:51,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:38:51,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:38:50" (1/3) ... [2021-10-29 05:38:51,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587b558e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:38:51, skipping insertion in model container [2021-10-29 05:38:51,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:38:51" (2/3) ... [2021-10-29 05:38:51,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587b558e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:38:51, skipping insertion in model container [2021-10-29 05:38:51,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:38:51" (3/3) ... [2021-10-29 05:38:51,836 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound10.c [2021-10-29 05:38:51,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:38:51,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-29 05:38:51,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:38:51,913 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 [2021-10-29 05:38:51,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-29 05:38:51,932 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) [2021-10-29 05:38:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:38:51,938 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:38:51,939 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:38:51,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:38:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:38:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2021-10-29 05:38:51,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:38:51,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70867940] [2021-10-29 05:38:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:51,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:38:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:38:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:38:52,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:38:52,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70867940] [2021-10-29 05:38:52,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70867940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:38:52,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:38:52,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:38:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833545474] [2021-10-29 05:38:52,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:38:52,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:38:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:38:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:38:52,262 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) [2021-10-29 05:38:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:38:52,325 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-29 05:38:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:38:52,328 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 [2021-10-29 05:38:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:38:52,343 INFO L225 Difference]: With dead ends: 33 [2021-10-29 05:38:52,349 INFO L226 Difference]: Without dead ends: 15 [2021-10-29 05:38:52,355 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 [2021-10-29 05:38:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-29 05:38:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-29 05:38:52,392 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) [2021-10-29 05:38:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-29 05:38:52,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-29 05:38:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:38:52,397 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-29 05:38:52,397 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) [2021-10-29 05:38:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-29 05:38:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:38:52,398 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:38:52,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:38:52,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:38:52,401 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:38:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:38:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2021-10-29 05:38:52,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:38:52,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826780156] [2021-10-29 05:38:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:52,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:38:52,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:38:52,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834095226] [2021-10-29 05:38:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:52,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:38:52,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:38:52,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:38:52,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:38:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:38:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:38:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:38:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:38:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:38:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:38:53,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:38:53,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826780156] [2021-10-29 05:38:53,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:38:53,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834095226] [2021-10-29 05:38:53,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834095226] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:38:53,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:38:53,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:38:53,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989522760] [2021-10-29 05:38:53,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:38:53,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:38:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:38:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:38:53,352 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) [2021-10-29 05:38:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:38:55,512 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-29 05:38:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:38:55,513 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 [2021-10-29 05:38:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:38:55,515 INFO L225 Difference]: With dead ends: 43 [2021-10-29 05:38:55,515 INFO L226 Difference]: Without dead ends: 32 [2021-10-29 05:38:55,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:38:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-29 05:38:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-10-29 05:38:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:38:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-29 05:38:55,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2021-10-29 05:38:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:38:55,527 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-29 05:38:55,527 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) [2021-10-29 05:38:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-29 05:38:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 05:38:55,528 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:38:55,529 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:38:55,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:38:55,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-29 05:38:55,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:38:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:38:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2021-10-29 05:38:55,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:38:55,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873456496] [2021-10-29 05:38:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:55,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:38:55,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:38:55,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227922643] [2021-10-29 05:38:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:55,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:38:55,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:38:55,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:38:55,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:38:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:38:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:38:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:38:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:38:55,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:38:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:38:56,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:38:56,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873456496] [2021-10-29 05:38:56,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:38:56,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227922643] [2021-10-29 05:38:56,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227922643] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:38:56,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742201595] [2021-10-29 05:38:56,099 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:38:56,099 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:38:56,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:38:56,112 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:38:56,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:38:56,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,186 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:38:56,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:38:56,200 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:38:56,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:38:56,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:38:56,269 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-10-29 05:38:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,314 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 [2021-10-29 05:38:56,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:38:56,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:38:56,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:38:56,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:38:56,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:38:56,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:38:56,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:38:56,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:56,440 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 [2021-10-29 05:38:56,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:38:56,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:38:56,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:38:56,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,531 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:38:56,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:38:56,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:38:56,549 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:38:56,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:38:56,602 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-10-29 05:38:56,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:38:56,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-10-29 05:38:56,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:56,861 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:38:56,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:38:56,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:38:56,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:56,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-10-29 05:38:56,955 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:38:56,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:38:56,972 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-10-29 05:38:56,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-29 05:38:56,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:57,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-29 05:38:57,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:57,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:38:57,039 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:38:58,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:38:58,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:38:58,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-29 05:38:58,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397854812] [2021-10-29 05:38:58,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:38:58,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:38:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:38:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-29 05:38:58,464 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:38:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:38:58,546 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-10-29 05:38:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:38:58,547 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 [2021-10-29 05:38:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:38:58,548 INFO L225 Difference]: With dead ends: 55 [2021-10-29 05:38:58,549 INFO L226 Difference]: Without dead ends: 45 [2021-10-29 05:38:58,550 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 [2021-10-29 05:38:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-29 05:38:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-10-29 05:38:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:38:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-29 05:38:58,559 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2021-10-29 05:38:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:38:58,559 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-29 05:38:58,560 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) [2021-10-29 05:38:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-29 05:38:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-29 05:38:58,561 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:38:58,561 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2021-10-29 05:38:58,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:38:58,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:38:58,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:38:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:38:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -468451453, now seen corresponding path program 1 times [2021-10-29 05:38:58,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:38:58,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156471786] [2021-10-29 05:38:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:58,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:38:58,801 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:38:58,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510865790] [2021-10-29 05:38:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:38:58,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:38:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:38:58,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:38:58,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:38:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:38:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-29 05:38:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:38:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:38:59,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:38:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:38:59,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:38:59,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156471786] [2021-10-29 05:38:59,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:38:59,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510865790] [2021-10-29 05:38:59,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510865790] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:38:59,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058949225] [2021-10-29 05:38:59,317 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-29 05:38:59,317 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:38:59,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:38:59,318 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:38:59,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:38:59,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,328 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:38:59,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:38:59,331 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:38:59,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:38:59,337 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:38:59,349 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-10-29 05:38:59,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:38:59,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:38:59,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:38:59,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:38:59,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,397 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 [2021-10-29 05:38:59,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:38:59,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:38:59,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:38:59,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:38:59,445 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 [2021-10-29 05:38:59,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:38:59,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:38:59,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:38:59,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,469 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:38:59,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:38:59,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:38:59,473 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:38:59,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:38:59,499 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-10-29 05:38:59,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:38:59,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 283 [2021-10-29 05:38:59,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:38:59,608 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:38:59,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:38:59,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:38:59,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-10-29 05:38:59,649 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:38:59,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:38:59,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:38:59,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:38:59,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:39:00,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:00,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:39:00,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-10-29 05:39:00,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933888005] [2021-10-29 05:39:00,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:39:00,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:39:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:39:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:39:00,377 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-10-29 05:39:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:39:00,584 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-10-29 05:39:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:39:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 13 [2021-10-29 05:39:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:39:00,586 INFO L225 Difference]: With dead ends: 41 [2021-10-29 05:39:00,586 INFO L226 Difference]: Without dead ends: 37 [2021-10-29 05:39:00,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-29 05:39:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-29 05:39:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-10-29 05:39:00,600 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) [2021-10-29 05:39:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-29 05:39:00,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2021-10-29 05:39:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:39:00,604 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-29 05:39:00,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-10-29 05:39:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-29 05:39:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:39:00,607 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:39:00,608 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:39:00,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:39:00,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:39:00,814 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:39:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:39:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1671355727, now seen corresponding path program 1 times [2021-10-29 05:39:00,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:39:00,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435960158] [2021-10-29 05:39:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:39:00,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:39:00,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:39:00,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674009441] [2021-10-29 05:39:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:39:00,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:39:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:39:00,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:39:00,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:39:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:39:00,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:39:00,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:39:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:39:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:39:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:39:01,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:39:01,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435960158] [2021-10-29 05:39:01,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:01,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674009441] [2021-10-29 05:39:01,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674009441] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:39:01,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127035618] [2021-10-29 05:39:01,457 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:39:01,458 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:39:01,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:39:01,458 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:39:01,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:39:01,470 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,472 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:39:01,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:39:01,479 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:39:01,480 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:39:01,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:39:01,489 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-10-29 05:39:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,514 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 [2021-10-29 05:39:01,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:39:01,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:39:01,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:01,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:39:01,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:39:01,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:39:01,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:01,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:01,574 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 [2021-10-29 05:39:01,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:39:01,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:39:01,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:01,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,603 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:39:01,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:39:01,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:39:01,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:39:01,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:39:01,623 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-10-29 05:39:01,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:39:01,640 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,650 INFO L185 QuantifierPusher]: treesize reduction 78, result has 72.0 percent of original size 201 [2021-10-29 05:39:01,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-29 05:39:01,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-10-29 05:39:01,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 353 [2021-10-29 05:39:01,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:01,858 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:39:01,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:39:01,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:39:01,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-10-29 05:39:01,888 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:39:01,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:39:01,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:39:01,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:39:01,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:01,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-29 05:39:01,954 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:39:03,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:03,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:39:03,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-29 05:39:03,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140988645] [2021-10-29 05:39:03,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:39:03,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:39:03,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:39:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-29 05:39:03,211 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) [2021-10-29 05:39:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:39:03,954 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-10-29 05:39:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:39:03,954 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 [2021-10-29 05:39:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:39:03,955 INFO L225 Difference]: With dead ends: 41 [2021-10-29 05:39:03,955 INFO L226 Difference]: Without dead ends: 27 [2021-10-29 05:39:03,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-10-29 05:39:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-29 05:39:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-29 05:39:03,964 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) [2021-10-29 05:39:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-29 05:39:03,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 14 [2021-10-29 05:39:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:39:03,965 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-29 05:39:03,965 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) [2021-10-29 05:39:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-29 05:39:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 05:39:03,966 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:39:03,966 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:39:04,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:39:04,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:39:04,182 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:39:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:39:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1946776116, now seen corresponding path program 2 times [2021-10-29 05:39:04,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:39:04,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221330073] [2021-10-29 05:39:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:39:04,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:39:04,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:39:04,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021359520] [2021-10-29 05:39:04,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:39:04,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:39:04,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:39:04,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:39:04,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:39:04,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 05:39:04,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:39:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 05:39:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:39:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:39:04,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:39:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:39:04,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:39:04,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221330073] [2021-10-29 05:39:04,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:04,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021359520] [2021-10-29 05:39:04,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021359520] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:39:04,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420997500] [2021-10-29 05:39:04,795 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:39:04,796 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:39:04,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:39:04,797 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:39:04,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:39:04,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,810 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:39:04,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:39:04,812 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:39:04,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:39:04,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:39:04,821 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-10-29 05:39:04,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:39:04,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:39:04,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:39:04,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,842 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 [2021-10-29 05:39:04,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:39:04,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:39:04,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:04,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:04,877 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 [2021-10-29 05:39:04,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:39:04,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:39:04,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:04,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,893 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:39:04,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:39:04,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:39:04,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:39:04,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:39:04,910 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-10-29 05:39:04,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-10-29 05:39:04,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:04,929 INFO L185 QuantifierPusher]: treesize reduction 76, result has 72.6 percent of original size 201 [2021-10-29 05:39:04,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:04,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-29 05:39:05,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-10-29 05:39:05,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-10-29 05:39:05,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:05,124 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:39:05,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:39:05,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:39:05,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-10-29 05:39:05,160 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:39:05,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:39:05,166 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.0 percent of original size [2021-10-29 05:39:05,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-29 05:39:05,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-29 05:39:05,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:05,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:39:05,197 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:39:06,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:06,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:39:06,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-29 05:39:06,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359136808] [2021-10-29 05:39:06,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-29 05:39:06,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:39:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-29 05:39:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-10-29 05:39:06,244 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) [2021-10-29 05:39:06,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:39:06,469 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-10-29 05:39:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 05:39:06,470 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 [2021-10-29 05:39:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:39:06,472 INFO L225 Difference]: With dead ends: 85 [2021-10-29 05:39:06,472 INFO L226 Difference]: Without dead ends: 79 [2021-10-29 05:39:06,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-10-29 05:39:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-29 05:39:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-10-29 05:39:06,487 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) [2021-10-29 05:39:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-10-29 05:39:06,489 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2021-10-29 05:39:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:39:06,490 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-10-29 05:39:06,490 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) [2021-10-29 05:39:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-10-29 05:39:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:39:06,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:39:06,492 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:39:06,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:39:06,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-29 05:39:06,703 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:39:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:39:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash 147972461, now seen corresponding path program 2 times [2021-10-29 05:39:06,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:39:06,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138747844] [2021-10-29 05:39:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:39:06,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:39:06,712 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:39:06,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389283131] [2021-10-29 05:39:06,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:39:06,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:39:06,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:39:06,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:39:06,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 05:39:07,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 05:39:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:39:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-29 05:39:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:39:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:39:07,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:39:12,003 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ (* (- 2) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (- 5) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (- 12)) 0))) is different from false [2021-10-29 05:39:22,180 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 2) ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 1)) (= (+ (* 4 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 4) (+ (* 2 ULTIMATE.start_main_~k~0) (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))))) (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 1))) (+ (* .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0 .cse0 .cse0) (* (- 5) .cse0 .cse0 .cse0 .cse0))) (- 12)) 0))) is different from false [2021-10-29 05:39:33,276 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 3) ULTIMATE.start_main_~k~0) (= (+ (* 3 ULTIMATE.start_main_~k~0) (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0)) (+ 9 (* 6 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 2)))) (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 2))) (+ (* (- 6) .cse0 .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0) (* (- 5) .cse0 .cse0 .cse0 .cse0))) (- 12)) 0))) is different from false [2021-10-29 05:39:46,343 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 3))) (+ (* (- 5) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0))) (- 12)) 0)) (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 4) ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 3)) (= (+ 16 (* 8 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (+ (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0) (* 4 ULTIMATE.start_main_~k~0)))))) is different from false [2021-10-29 05:39:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 40 not checked. [2021-10-29 05:39:52,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:39:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138747844] [2021-10-29 05:39:52,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389283131] [2021-10-29 05:39:52,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389283131] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:39:52,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052072887] [2021-10-29 05:39:52,508 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:39:52,508 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:39:52,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:39:52,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:39:52,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:39:52,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,516 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:39:52,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:39:52,518 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:39:52,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:39:52,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:39:52,526 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-10-29 05:39:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,552 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 [2021-10-29 05:39:52,554 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:39:52,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:39:52,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:52,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:39:52,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:39:52,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:39:52,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:52,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:39:52,597 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 [2021-10-29 05:39:52,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:39:52,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:39:52,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:39:52,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,612 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:39:52,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:39:52,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:39:52,615 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:39:52,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:39:52,626 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-10-29 05:39:52,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:39:52,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 309 [2021-10-29 05:39:52,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:39:52,693 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:39:52,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:39:52,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:39:52,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-10-29 05:39:52,717 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:39:52,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:39:52,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:39:52,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:39:52,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:39:52,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-29 05:39:52,770 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:39:54,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:39:54,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:39:54,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-29 05:39:54,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298619339] [2021-10-29 05:39:54,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-29 05:39:54,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:39:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-29 05:39:54,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=353, Unknown=4, NotChecked=164, Total=600 [2021-10-29 05:39:54,058 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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) [2021-10-29 05:39:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:39:57,631 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-10-29 05:39:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:39:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 [2021-10-29 05:39:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:39:57,635 INFO L225 Difference]: With dead ends: 55 [2021-10-29 05:39:57,635 INFO L226 Difference]: Without dead ends: 49 [2021-10-29 05:39:57,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=121, Invalid=593, Unknown=4, NotChecked=212, Total=930 [2021-10-29 05:39:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-29 05:39:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-29 05:39:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 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) [2021-10-29 05:39:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-10-29 05:39:57,649 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 26 [2021-10-29 05:39:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:39:57,650 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-10-29 05:39:57,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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) [2021-10-29 05:39:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-10-29 05:39:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 05:39:57,651 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:39:57,652 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:39:57,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:39:57,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-29 05:39:57,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:39:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:39:57,859 INFO L85 PathProgramCache]: Analyzing trace with hash -5485311, now seen corresponding path program 3 times [2021-10-29 05:39:57,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:39:57,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796458965] [2021-10-29 05:39:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:39:57,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:39:57,885 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:39:57,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753898559] [2021-10-29 05:39:57,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 05:39:57,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:39:57,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:39:57,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:39:57,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 05:39:58,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 05:39:58,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:39:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-29 05:39:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:39:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:39:59,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:00,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:00,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796458965] [2021-10-29 05:40:00,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:40:00,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753898559] [2021-10-29 05:40:00,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753898559] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:40:00,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008637968] [2021-10-29 05:40:00,577 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-29 05:40:00,578 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:40:00,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:40:00,578 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:40:00,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:40:00,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,586 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:40:00,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:40:00,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:40:00,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:40:00,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:40:00,606 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-10-29 05:40:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,634 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 [2021-10-29 05:40:00,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:40:00,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:40:00,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:40:00,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:40:00,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:40:00,647 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:40:00,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:40:00,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:40:00,677 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 [2021-10-29 05:40:00,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:40:00,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:40:00,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:40:00,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,690 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.6 percent of original size [2021-10-29 05:40:00,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-29 05:40:00,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:40:00,693 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:300, output treesize:121 [2021-10-29 05:40:00,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-29 05:40:00,706 INFO L180 QuantifierPusher]: treesize reduction 29, result has 87.7 percent of original size [2021-10-29 05:40:00,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:40:00,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 309 [2021-10-29 05:40:00,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:40:00,760 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:40:00,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:40:00,765 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:40:00,772 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-10-29 05:40:00,786 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-10-29 05:40:00,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-29 05:40:00,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-29 05:40:00,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-10-29 05:40:00,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:40:00,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-29 05:40:00,833 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:40:02,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:40:02,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:40:02,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-29 05:40:02,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396978022] [2021-10-29 05:40:02,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-29 05:40:02,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-29 05:40:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-29 05:40:02,246 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-10-29 05:40:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:04,398 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-10-29 05:40:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:40:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-29 05:40:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:04,399 INFO L225 Difference]: With dead ends: 59 [2021-10-29 05:40:04,400 INFO L226 Difference]: Without dead ends: 49 [2021-10-29 05:40:04,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-10-29 05:40:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-29 05:40:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-29 05:40:04,428 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) [2021-10-29 05:40:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-10-29 05:40:04,428 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 30 [2021-10-29 05:40:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:04,429 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-10-29 05:40:04,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-10-29 05:40:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-10-29 05:40:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-29 05:40:04,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:04,434 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:04,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:04,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-29 05:40:04,634 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:40:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash -307052628, now seen corresponding path program 3 times [2021-10-29 05:40:04,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:04,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656956699] [2021-10-29 05:40:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:04,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:04,649 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:40:04,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308898571] [2021-10-29 05:40:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 05:40:04,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:40:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:40:04,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:40:04,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-29 05:40:06,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 05:40:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-29 05:40:06,340 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:40:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:40:07,075 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:40:07,075 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:40:07,076 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:40:07,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:40:07,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:40:07,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-29 05:40:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:40:07,290 INFO L731 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1] [2021-10-29 05:40:07,294 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:40:07,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:40:07 BoogieIcfgContainer [2021-10-29 05:40:07,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:40:07,360 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:40:07,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:40:07,360 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:40:07,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:38:51" (3/4) ... [2021-10-29 05:40:07,363 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:40:07,450 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:40:07,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:40:07,452 INFO L168 Benchmark]: Toolchain (without parser) took 76619.88 ms. Allocated memory was 90.2 MB in the beginning and 163.6 MB in the end (delta: 73.4 MB). Free memory was 56.9 MB in the beginning and 105.4 MB in the end (delta: -48.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,452 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory was 46.8 MB in the beginning and 46.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:40:07,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.40 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 56.7 MB in the beginning and 88.3 MB in the end (delta: -31.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.30 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 86.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,453 INFO L168 Benchmark]: Boogie Preprocessor took 26.23 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 85.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,454 INFO L168 Benchmark]: RCFGBuilder took 565.57 ms. Allocated memory is still 113.2 MB. Free memory was 85.6 MB in the beginning and 74.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,454 INFO L168 Benchmark]: TraceAbstraction took 75531.86 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 73.3 MB in the beginning and 110.6 MB in the end (delta: -37.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,454 INFO L168 Benchmark]: Witness Printer took 90.79 ms. Allocated memory is still 163.6 MB. Free memory was 110.6 MB in the beginning and 105.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:07,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory was 46.8 MB in the beginning and 46.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.40 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 56.7 MB in the beginning and 88.3 MB in the end (delta: -31.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.30 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 86.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.23 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 85.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 565.57 ms. Allocated memory is still 113.2 MB. Free memory was 85.6 MB in the beginning and 74.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 75531.86 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 73.3 MB in the beginning and 110.6 MB in the end (delta: -37.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * Witness Printer took 90.79 ms. Allocated memory is still 163.6 MB. Free memory was 110.6 MB in the beginning and 105.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=3] [L28] EXPR counter++ VAL [counter=4] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=4] [L28] EXPR counter++ VAL [counter=5] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=5] [L28] EXPR counter++ VAL [counter=6] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=6] [L28] EXPR counter++ VAL [counter=7] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=7] [L28] EXPR counter++ VAL [counter=8] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=8] [L28] EXPR counter++ VAL [counter=9] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=9] [L28] EXPR counter++ VAL [counter=10] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=10] [L28] EXPR counter++ VAL [counter=11] [L28] COND FALSE !(counter++<10) [L10] COND FALSE !(!(cond)) VAL [counter=11] [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 75.3s, OverallIterations: 9, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 104 SDtfs, 269 SDslu, 463 SDs, 0 SdLazy, 483 SolverSat, 77 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 397 GetRequests, 236 SyntacticMatches, 12 SemanticMatches, 149 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 21.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=6, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 63 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 49.2s InterpolantComputationTime, 177 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 238 ConstructedInterpolants, 40 QuantifiedInterpolants, 3613 SizeOfPredicates, 30 NumberOfNonLiveVariables, 738 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 8/296 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:40:07,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31ded68-78a0-4fdd-8a9a-ad8728eaf6a3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...