./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.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_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/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_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/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_eb6fe407-3696-4a31-a131-156d45d24f77/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 33e65da42eaec3b998693833c359b0db98e1fca213179917a50e687ef24ee4df ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:36:11,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:36:11,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:36:11,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:36:11,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:36:11,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:36:11,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:36:11,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:36:11,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:36:11,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:36:11,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:36:11,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:36:11,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:36:11,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:36:11,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:36:11,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:36:11,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:36:11,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:36:11,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:36:11,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:36:11,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:36:11,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:36:11,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:36:11,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:36:11,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:36:11,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:36:11,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:36:11,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:36:11,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:36:11,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:36:11,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:36:11,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:36:11,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:36:11,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:36:11,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:36:11,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:36:11,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:36:11,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:36:11,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:36:11,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:36:11,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:36:11,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:36:11,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:36:11,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:36:11,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:36:11,569 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:36:11,569 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:36:11,570 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:36:11,570 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:36:11,570 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:36:11,570 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:36:11,571 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:36:11,571 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:36:11,571 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:36:11,571 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:36:11,572 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:36:11,572 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:36:11,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:36:11,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:36:11,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:36:11,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:36:11,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:36:11,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:36:11,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:36:11,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:36:11,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:36:11,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:36:11,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:36:11,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:36:11,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:36:11,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:36:11,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:36:11,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:36:11,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:36:11,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:36:11,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:36:11,578 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:36:11,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:36:11,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:36:11,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:36:11,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:36:11,579 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_eb6fe407-3696-4a31-a131-156d45d24f77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33e65da42eaec3b998693833c359b0db98e1fca213179917a50e687ef24ee4df [2021-10-29 05:36:11,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:36:11,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:36:11,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:36:11,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:36:11,937 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:36:11,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-10-29 05:36:12,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/data/b30e6a583/9fd643bb319f44db90d1a4fe59f242b9/FLAG2abd49cfb [2021-10-29 05:36:12,595 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:36:12,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-10-29 05:36:12,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/data/b30e6a583/9fd643bb319f44db90d1a4fe59f242b9/FLAG2abd49cfb [2021-10-29 05:36:12,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/data/b30e6a583/9fd643bb319f44db90d1a4fe59f242b9 [2021-10-29 05:36:12,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:36:12,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:36:12,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:36:12,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:36:12,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:36:12,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:36:12" (1/1) ... [2021-10-29 05:36:12,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54dcaa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:12, skipping insertion in model container [2021-10-29 05:36:12,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:36:12" (1/1) ... [2021-10-29 05:36:12,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:36:12,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:36:13,152 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_eb6fe407-3696-4a31-a131-156d45d24f77/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2021-10-29 05:36:13,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:36:13,187 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:36:13,201 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_eb6fe407-3696-4a31-a131-156d45d24f77/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2021-10-29 05:36:13,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:36:13,228 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:36:13,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13 WrapperNode [2021-10-29 05:36:13,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:36:13,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:36:13,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:36:13,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:36:13,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:36:13,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:36:13,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:36:13,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:36:13,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:36:13,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:36:13,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:36:13,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:36:13,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (1/1) ... [2021-10-29 05:36:13,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:36:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:13,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:36:13,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:36:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:36:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:36:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:36:13,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:36:13,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:36:13,890 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-29 05:36:13,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:13 BoogieIcfgContainer [2021-10-29 05:36:13,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:36:13,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:36:13,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:36:13,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:36:13,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:36:12" (1/3) ... [2021-10-29 05:36:13,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f615e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:36:13, skipping insertion in model container [2021-10-29 05:36:13,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:36:13" (2/3) ... [2021-10-29 05:36:13,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f615e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:36:13, skipping insertion in model container [2021-10-29 05:36:13,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:13" (3/3) ... [2021-10-29 05:36:13,914 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.c [2021-10-29 05:36:13,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:36:13,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-29 05:36:13,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:36:13,982 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 05:36:13,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-29 05:36:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 32 states have internal predecessors, (46), 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 05:36:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:36:14,008 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:14,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:36:14,009 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-29 05:36:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash 160510030, now seen corresponding path program 1 times [2021-10-29 05:36:14,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:14,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105037373] [2021-10-29 05:36:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:14,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:36:14,217 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 05:36:14,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:36:14,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105037373] [2021-10-29 05:36:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105037373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:36:14,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:36:14,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:36:14,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075822789] [2021-10-29 05:36:14,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:36:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:36:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:36:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:36:14,246 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 32 states have internal predecessors, (46), 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 05:36:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:14,267 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2021-10-29 05:36:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:36:14,268 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 05:36:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:14,278 INFO L225 Difference]: With dead ends: 65 [2021-10-29 05:36:14,278 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 05:36:14,282 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 05:36:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 05:36:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-29 05:36:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 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 05:36:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-29 05:36:14,322 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2021-10-29 05:36:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:14,322 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-29 05:36:14,323 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 05:36:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-29 05:36:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:36:14,324 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:14,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:36:14,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:36:14,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-29 05:36:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 592212585, now seen corresponding path program 1 times [2021-10-29 05:36:14,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:14,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17313142] [2021-10-29 05:36:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:14,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:36:14,422 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 05:36:14,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:36:14,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17313142] [2021-10-29 05:36:14,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17313142] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:36:14,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:36:14,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:36:14,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325573703] [2021-10-29 05:36:14,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:36:14,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:36:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:36:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:36:14,427 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:36:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:14,452 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-10-29 05:36:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:36:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-29 05:36:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:14,454 INFO L225 Difference]: With dead ends: 37 [2021-10-29 05:36:14,454 INFO L226 Difference]: Without dead ends: 33 [2021-10-29 05:36:14,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:36:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-29 05:36:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-29 05:36:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 32 states have internal predecessors, (38), 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 05:36:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-29 05:36:14,462 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2021-10-29 05:36:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:14,463 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-29 05:36:14,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:36:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-29 05:36:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:36:14,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:14,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:36:14,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:36:14,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-29 05:36:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1177973352, now seen corresponding path program 1 times [2021-10-29 05:36:14,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:14,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029231755] [2021-10-29 05:36:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:14,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:14,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:36:14,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748653357] [2021-10-29 05:36:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:14,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:14,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:14,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:36:14,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:36:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:36:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:36:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:36:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:36:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:36:14,822 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 05:36:14,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:36:14,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029231755] [2021-10-29 05:36:14,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:36:14,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748653357] [2021-10-29 05:36:14,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748653357] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:36:14,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:36:14,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:36:14,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907035953] [2021-10-29 05:36:14,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:36:14,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:36:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:36:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:36:14,835 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 05:36:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:14,907 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-29 05:36:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:36:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-10-29 05:36:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:14,910 INFO L225 Difference]: With dead ends: 61 [2021-10-29 05:36:14,910 INFO L226 Difference]: Without dead ends: 57 [2021-10-29 05:36:14,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:36:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-29 05:36:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2021-10-29 05:36:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 33 states have internal predecessors, (39), 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 05:36:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-29 05:36:14,918 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2021-10-29 05:36:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:14,919 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-29 05:36:14,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 05:36:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-29 05:36:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:36:14,920 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:14,920 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:36:14,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:36:15,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:15,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-29 05:36:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1175714080, now seen corresponding path program 1 times [2021-10-29 05:36:15,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:15,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91012971] [2021-10-29 05:36:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:15,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:15,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:36:15,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629153434] [2021-10-29 05:36:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:15,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:15,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:15,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:36:15,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:36:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:36:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:36:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:36:15,340 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 05:36:15,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:36:15,447 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 05:36:15,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:36:15,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91012971] [2021-10-29 05:36:15,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:36:15,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629153434] [2021-10-29 05:36:15,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629153434] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:36:15,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:36:15,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-29 05:36:15,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145309744] [2021-10-29 05:36:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:36:15,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:36:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:36:15,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:36:15,471 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 05:36:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:15,530 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-10-29 05:36:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:36:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-10-29 05:36:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:15,534 INFO L225 Difference]: With dead ends: 49 [2021-10-29 05:36:15,534 INFO L226 Difference]: Without dead ends: 19 [2021-10-29 05:36:15,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:36:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-29 05:36:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-29 05:36:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 05:36:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-29 05:36:15,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-10-29 05:36:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:15,546 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-29 05:36:15,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 05:36:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-29 05:36:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 05:36:15,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:15,547 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:36:15,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-29 05:36:15,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:15,767 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-29 05:36:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2121654826, now seen corresponding path program 1 times [2021-10-29 05:36:15,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:15,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910524107] [2021-10-29 05:36:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:15,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:15,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:36:15,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302304951] [2021-10-29 05:36:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:15,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:15,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:15,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:36:15,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:36:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:36:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:36:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:36:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:36:15,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:36:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:36:15,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:36:15,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910524107] [2021-10-29 05:36:16,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:36:16,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302304951] [2021-10-29 05:36:16,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302304951] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:36:16,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:36:16,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 05:36:16,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344748711] [2021-10-29 05:36:16,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:36:16,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:36:16,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:36:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:36:16,014 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 05:36:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:16,047 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-10-29 05:36:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:36:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 05:36:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:16,049 INFO L225 Difference]: With dead ends: 34 [2021-10-29 05:36:16,049 INFO L226 Difference]: Without dead ends: 20 [2021-10-29 05:36:16,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:36:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-29 05:36:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-29 05:36:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:36:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-29 05:36:16,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-10-29 05:36:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:16,061 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-29 05:36:16,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 05:36:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-29 05:36:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-29 05:36:16,062 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:16,062 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:36:16,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:36:16,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:16,283 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-29 05:36:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash 222893626, now seen corresponding path program 1 times [2021-10-29 05:36:16,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:36:16,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233690969] [2021-10-29 05:36:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:16,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:36:16,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:36:16,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337296880] [2021-10-29 05:36:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:16,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:36:16,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:36:16,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:36:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:16,414 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:36:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:16,468 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:36:16,469 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:36:16,473 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:16,475 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:16,475 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:16,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:16,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:16,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:36:16,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:36:16,701 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-10-29 05:36:16,705 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:36:16,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:36:16 BoogieIcfgContainer [2021-10-29 05:36:16,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:36:16,740 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:36:16,740 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:36:16,740 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:36:16,741 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:36:13" (3/4) ... [2021-10-29 05:36:16,743 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:36:16,806 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:36:16,806 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:36:16,808 INFO L168 Benchmark]: Toolchain (without parser) took 3895.21 ms. Allocated memory was 148.9 MB in the beginning and 184.5 MB in the end (delta: 35.7 MB). Free memory was 108.9 MB in the beginning and 130.5 MB in the end (delta: -21.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:16,808 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 148.9 MB. Free memory was 125.3 MB in the beginning and 125.1 MB in the end (delta: 140.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:16,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.47 ms. Allocated memory is still 148.9 MB. Free memory was 108.8 MB in the beginning and 121.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:16,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.72 ms. Allocated memory is still 148.9 MB. Free memory was 121.2 MB in the beginning and 119.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:16,810 INFO L168 Benchmark]: Boogie Preprocessor took 32.28 ms. Allocated memory is still 148.9 MB. Free memory was 119.9 MB in the beginning and 118.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:16,810 INFO L168 Benchmark]: RCFGBuilder took 597.99 ms. Allocated memory is still 148.9 MB. Free memory was 118.4 MB in the beginning and 103.8 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:16,811 INFO L168 Benchmark]: TraceAbstraction took 2831.98 ms. Allocated memory was 148.9 MB in the beginning and 184.5 MB in the end (delta: 35.7 MB). Free memory was 103.1 MB in the beginning and 133.6 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:16,811 INFO L168 Benchmark]: Witness Printer took 66.24 ms. Allocated memory is still 184.5 MB. Free memory was 133.6 MB in the beginning and 130.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:16,814 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 148.9 MB. Free memory was 125.3 MB in the beginning and 125.1 MB in the end (delta: 140.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.47 ms. Allocated memory is still 148.9 MB. Free memory was 108.8 MB in the beginning and 121.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.72 ms. Allocated memory is still 148.9 MB. Free memory was 121.2 MB in the beginning and 119.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.28 ms. Allocated memory is still 148.9 MB. Free memory was 119.9 MB in the beginning and 118.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 597.99 ms. Allocated memory is still 148.9 MB. Free memory was 118.4 MB in the beginning and 103.8 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2831.98 ms. Allocated memory was 148.9 MB in the beginning and 184.5 MB in the end (delta: 35.7 MB). Free memory was 103.1 MB in the beginning and 133.6 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 66.24 ms. Allocated memory is still 184.5 MB. Free memory was 133.6 MB in the beginning and 130.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<2 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND FALSE !(counter++<2) [L11] COND TRUE !(cond) VAL [counter=3] [L13] reach_error() VAL [counter=3] - UnprovableResult [Line: 13]: 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: 13]: 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: 13]: 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: 13]: 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, 33 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 62 SDslu, 146 SDs, 0 SdLazy, 55 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 131 SizeOfPredicates, 6 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 4/4 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 05:36:16,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb6fe407-3696-4a31-a131-156d45d24f77/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...