./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE --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 1f02632fff6230a332a62c3e19b9c0e1537cb9f813d08c30374ad65993036a6c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:44:04,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:44:04,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:44:04,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:44:04,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:44:04,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:44:04,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:44:04,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:44:04,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:44:04,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:44:04,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:44:04,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:44:04,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:44:04,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:44:04,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:44:04,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:44:04,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:44:04,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:44:04,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:44:04,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:44:04,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:44:04,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:44:04,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:44:04,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:44:04,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:44:04,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:44:04,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:44:04,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:44:04,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:44:04,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:44:04,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:44:04,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:44:04,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:44:04,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:44:04,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:44:04,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:44:04,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:44:04,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:44:04,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:44:04,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:44:04,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:44:04,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:44:04,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:44:04,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:44:04,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:44:04,464 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:44:04,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:44:04,465 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:44:04,466 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:44:04,466 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:44:04,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:44:04,467 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:44:04,467 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:44:04,468 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:44:04,468 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:44:04,468 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:44:04,469 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:44:04,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:44:04,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:44:04,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:44:04,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:44:04,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:44:04,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:44:04,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:44:04,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:44:04,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:44:04,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:44:04,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:44:04,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:44:04,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:44:04,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:44:04,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:44:04,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:44:04,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:44:04,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:44:04,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:44:04,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:44:04,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:44:04,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:44:04,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:44:04,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:44:04,484 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_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f02632fff6230a332a62c3e19b9c0e1537cb9f813d08c30374ad65993036a6c [2021-10-24 10:44:04,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:44:04,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:44:04,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:44:04,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:44:04,810 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:44:04,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c [2021-10-24 10:44:04,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/data/9faac30ba/6885664894ce4b6c8e23df9c7df57deb/FLAG25d482366 [2021-10-24 10:44:05,526 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:44:05,527 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/sv-benchmarks/c/eca-rers2012/Problem01_label36.c [2021-10-24 10:44:05,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/data/9faac30ba/6885664894ce4b6c8e23df9c7df57deb/FLAG25d482366 [2021-10-24 10:44:05,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/data/9faac30ba/6885664894ce4b6c8e23df9c7df57deb [2021-10-24 10:44:05,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:44:05,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:44:05,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:44:05,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:44:05,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:44:05,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:44:05" (1/1) ... [2021-10-24 10:44:05,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1c056f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:05, skipping insertion in model container [2021-10-24 10:44:05,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:44:05" (1/1) ... [2021-10-24 10:44:05,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:44:05,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:44:06,341 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_f8d9917c-c9f8-4432-a204-d670a70b08b1/sv-benchmarks/c/eca-rers2012/Problem01_label36.c[18233,18246] [2021-10-24 10:44:06,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:44:06,391 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:44:06,504 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_f8d9917c-c9f8-4432-a204-d670a70b08b1/sv-benchmarks/c/eca-rers2012/Problem01_label36.c[18233,18246] [2021-10-24 10:44:06,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:44:06,546 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:44:06,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06 WrapperNode [2021-10-24 10:44:06,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:44:06,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:44:06,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:44:06,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:44:06,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:44:06,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:44:06,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:44:06,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:44:06,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:44:06,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:44:06,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:44:06,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:44:06,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (1/1) ... [2021-10-24 10:44:06,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:44:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:44:06,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:44:06,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:44:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:44:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:44:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:44:06,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:44:08,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:44:08,853 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:44:08,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:44:08 BoogieIcfgContainer [2021-10-24 10:44:08,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:44:08,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:44:08,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:44:08,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:44:08,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:44:05" (1/3) ... [2021-10-24 10:44:08,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f194765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:44:08, skipping insertion in model container [2021-10-24 10:44:08,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:44:06" (2/3) ... [2021-10-24 10:44:08,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f194765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:44:08, skipping insertion in model container [2021-10-24 10:44:08,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:44:08" (3/3) ... [2021-10-24 10:44:08,867 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label36.c [2021-10-24 10:44:08,877 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:44:08,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:44:08,946 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:44:08,956 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 [2021-10-24 10:44:08,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:44:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-24 10:44:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-24 10:44:08,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:08,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:08,988 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -104652856, now seen corresponding path program 1 times [2021-10-24 10:44:09,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:09,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644937862] [2021-10-24 10:44:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:09,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:44:09,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:09,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644937862] [2021-10-24 10:44:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644937862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:09,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:09,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:44:09,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277251149] [2021-10-24 10:44:09,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:09,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:09,477 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-24 10:44:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:09,978 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-24 10:44:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:09,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 71 [2021-10-24 10:44:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:10,002 INFO L225 Difference]: With dead ends: 224 [2021-10-24 10:44:10,002 INFO L226 Difference]: Without dead ends: 145 [2021-10-24 10:44:10,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-24 10:44:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-24 10:44:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 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) [2021-10-24 10:44:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-24 10:44:10,087 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-24 10:44:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:10,088 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-24 10:44:10,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-24 10:44:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-24 10:44:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-24 10:44:10,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:10,095 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:10,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:44:10,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash -601806437, now seen corresponding path program 1 times [2021-10-24 10:44:10,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:10,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412154134] [2021-10-24 10:44:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:10,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:44:10,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:10,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412154134] [2021-10-24 10:44:10,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412154134] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:10,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:10,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:44:10,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056505719] [2021-10-24 10:44:10,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:10,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:10,202 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-24 10:44:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:10,607 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-24 10:44:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 77 [2021-10-24 10:44:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:10,614 INFO L225 Difference]: With dead ends: 431 [2021-10-24 10:44:10,614 INFO L226 Difference]: Without dead ends: 287 [2021-10-24 10:44:10,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-24 10:44:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-24 10:44:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6363636363636365) internal successors, (468), 286 states have internal predecessors, (468), 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) [2021-10-24 10:44:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2021-10-24 10:44:10,654 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2021-10-24 10:44:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:10,655 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2021-10-24 10:44:10,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-24 10:44:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2021-10-24 10:44:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-24 10:44:10,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:10,664 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:10,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:44:10,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140007, now seen corresponding path program 1 times [2021-10-24 10:44:10,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:10,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973379105] [2021-10-24 10:44:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:10,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:44:10,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973379105] [2021-10-24 10:44:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973379105] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:10,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:10,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:44:10,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261875372] [2021-10-24 10:44:10,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:44:10,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:44:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:44:10,873 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-10-24 10:44:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:11,426 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2021-10-24 10:44:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:44:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-10-24 10:44:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:11,431 INFO L225 Difference]: With dead ends: 784 [2021-10-24 10:44:11,431 INFO L226 Difference]: Without dead ends: 429 [2021-10-24 10:44:11,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:44:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-24 10:44:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-10-24 10:44:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3014018691588785) internal successors, (557), 428 states have internal predecessors, (557), 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) [2021-10-24 10:44:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2021-10-24 10:44:11,454 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2021-10-24 10:44:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:11,455 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2021-10-24 10:44:11,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-10-24 10:44:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2021-10-24 10:44:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-24 10:44:11,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:11,478 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:11,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:44:11,478 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash -771917970, now seen corresponding path program 1 times [2021-10-24 10:44:11,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:11,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097032881] [2021-10-24 10:44:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:11,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:44:11,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:11,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097032881] [2021-10-24 10:44:11,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097032881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:11,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:44:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970576643] [2021-10-24 10:44:11,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:11,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:11,596 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2021-10-24 10:44:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:11,935 INFO L93 Difference]: Finished difference Result 857 states and 1138 transitions. [2021-10-24 10:44:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 83 [2021-10-24 10:44:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:11,940 INFO L225 Difference]: With dead ends: 857 [2021-10-24 10:44:11,940 INFO L226 Difference]: Without dead ends: 500 [2021-10-24 10:44:11,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-24 10:44:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-24 10:44:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.282565130260521) internal successors, (640), 499 states have internal predecessors, (640), 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) [2021-10-24 10:44:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 640 transitions. [2021-10-24 10:44:11,989 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 640 transitions. Word has length 83 [2021-10-24 10:44:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 640 transitions. [2021-10-24 10:44:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2021-10-24 10:44:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 640 transitions. [2021-10-24 10:44:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-24 10:44:11,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:11,993 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:11,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:44:11,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1248268982, now seen corresponding path program 1 times [2021-10-24 10:44:11,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:11,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37557255] [2021-10-24 10:44:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:11,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 10:44:12,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:12,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37557255] [2021-10-24 10:44:12,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37557255] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:12,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:12,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:44:12,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369932990] [2021-10-24 10:44:12,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:12,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:12,094 INFO L87 Difference]: Start difference. First operand 500 states and 640 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-24 10:44:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:12,414 INFO L93 Difference]: Finished difference Result 1283 states and 1651 transitions. [2021-10-24 10:44:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 92 [2021-10-24 10:44:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:12,421 INFO L225 Difference]: With dead ends: 1283 [2021-10-24 10:44:12,422 INFO L226 Difference]: Without dead ends: 855 [2021-10-24 10:44:12,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-24 10:44:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-24 10:44:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 641 states have internal predecessors, (819), 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) [2021-10-24 10:44:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 819 transitions. [2021-10-24 10:44:12,450 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 819 transitions. Word has length 92 [2021-10-24 10:44:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:12,450 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 819 transitions. [2021-10-24 10:44:12,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-24 10:44:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 819 transitions. [2021-10-24 10:44:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-24 10:44:12,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:12,454 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:12,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 10:44:12,454 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:12,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1552489925, now seen corresponding path program 1 times [2021-10-24 10:44:12,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:12,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24630837] [2021-10-24 10:44:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:12,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:44:12,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:12,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24630837] [2021-10-24 10:44:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24630837] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:12,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:12,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:44:12,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245048737] [2021-10-24 10:44:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:12,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:12,539 INFO L87 Difference]: Start difference. First operand 642 states and 819 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-10-24 10:44:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:12,914 INFO L93 Difference]: Finished difference Result 1425 states and 1827 transitions. [2021-10-24 10:44:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:12,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 98 [2021-10-24 10:44:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:12,921 INFO L225 Difference]: With dead ends: 1425 [2021-10-24 10:44:12,921 INFO L226 Difference]: Without dead ends: 855 [2021-10-24 10:44:12,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-24 10:44:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 784. [2021-10-24 10:44:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.260536398467433) internal successors, (987), 783 states have internal predecessors, (987), 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) [2021-10-24 10:44:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 987 transitions. [2021-10-24 10:44:12,969 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 987 transitions. Word has length 98 [2021-10-24 10:44:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:12,970 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 987 transitions. [2021-10-24 10:44:12,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-10-24 10:44:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 987 transitions. [2021-10-24 10:44:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-24 10:44:12,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:12,975 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:12,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:44:12,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1595244312, now seen corresponding path program 1 times [2021-10-24 10:44:12,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:12,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764464948] [2021-10-24 10:44:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:12,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:44:13,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:13,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764464948] [2021-10-24 10:44:13,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764464948] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:13,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:13,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:44:13,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574483484] [2021-10-24 10:44:13,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:44:13,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:44:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:44:13,106 INFO L87 Difference]: Start difference. First operand 784 states and 987 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-10-24 10:44:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:13,657 INFO L93 Difference]: Finished difference Result 2064 states and 2680 transitions. [2021-10-24 10:44:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:44:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 112 [2021-10-24 10:44:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:13,666 INFO L225 Difference]: With dead ends: 2064 [2021-10-24 10:44:13,667 INFO L226 Difference]: Without dead ends: 1210 [2021-10-24 10:44:13,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:44:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-24 10:44:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2021-10-24 10:44:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.2352389878163075) internal successors, (1318), 1067 states have internal predecessors, (1318), 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) [2021-10-24 10:44:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1318 transitions. [2021-10-24 10:44:13,723 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1318 transitions. Word has length 112 [2021-10-24 10:44:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:13,724 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1318 transitions. [2021-10-24 10:44:13,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-10-24 10:44:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1318 transitions. [2021-10-24 10:44:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-24 10:44:13,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:13,728 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:13,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 10:44:13,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1599131931, now seen corresponding path program 1 times [2021-10-24 10:44:13,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:13,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742168811] [2021-10-24 10:44:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:13,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:44:13,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:13,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742168811] [2021-10-24 10:44:13,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742168811] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:13,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:44:13,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:44:13,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037313450] [2021-10-24 10:44:13,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:13,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:13,814 INFO L87 Difference]: Start difference. First operand 1068 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-10-24 10:44:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:14,128 INFO L93 Difference]: Finished difference Result 2206 states and 2737 transitions. [2021-10-24 10:44:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:14,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 118 [2021-10-24 10:44:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:14,136 INFO L225 Difference]: With dead ends: 2206 [2021-10-24 10:44:14,136 INFO L226 Difference]: Without dead ends: 1139 [2021-10-24 10:44:14,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:44:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-24 10:44:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2021-10-24 10:44:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.2408622305529522) internal successors, (1324), 1067 states have internal predecessors, (1324), 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) [2021-10-24 10:44:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1324 transitions. [2021-10-24 10:44:14,171 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1324 transitions. Word has length 118 [2021-10-24 10:44:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:14,172 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1324 transitions. [2021-10-24 10:44:14,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-10-24 10:44:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1324 transitions. [2021-10-24 10:44:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-10-24 10:44:14,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:14,176 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:14,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 10:44:14,176 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1232109576, now seen corresponding path program 1 times [2021-10-24 10:44:14,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:14,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927187851] [2021-10-24 10:44:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:14,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-24 10:44:14,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:14,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927187851] [2021-10-24 10:44:14,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927187851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:44:14,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126533276] [2021-10-24 10:44:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:14,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:44:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:44:14,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:44:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:44:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:44:14,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:44:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 10:44:14,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:44:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 10:44:15,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126533276] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:15,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:44:15,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-10-24 10:44:15,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319115455] [2021-10-24 10:44:15,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:15,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:44:15,340 INFO L87 Difference]: Start difference. First operand 1068 states and 1324 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-10-24 10:44:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:15,682 INFO L93 Difference]: Finished difference Result 2135 states and 2647 transitions. [2021-10-24 10:44:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 132 [2021-10-24 10:44:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:15,690 INFO L225 Difference]: With dead ends: 2135 [2021-10-24 10:44:15,690 INFO L226 Difference]: Without dead ends: 1068 [2021-10-24 10:44:15,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:44:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-24 10:44:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2021-10-24 10:44:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1897590361445782) internal successors, (1185), 996 states have internal predecessors, (1185), 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) [2021-10-24 10:44:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1185 transitions. [2021-10-24 10:44:15,724 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1185 transitions. Word has length 132 [2021-10-24 10:44:15,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:15,725 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1185 transitions. [2021-10-24 10:44:15,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-10-24 10:44:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1185 transitions. [2021-10-24 10:44:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-24 10:44:15,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:44:15,729 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:44:15,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:44:15,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:44:15,946 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:44:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:44:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 454181958, now seen corresponding path program 1 times [2021-10-24 10:44:15,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:44:15,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115971410] [2021-10-24 10:44:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:15,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:44:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:44:16,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:44:16,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115971410] [2021-10-24 10:44:16,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115971410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:44:16,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454609544] [2021-10-24 10:44:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:44:16,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:44:16,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:44:16,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:44:16,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:44:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:44:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:44:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:44:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-24 10:44:16,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:44:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-24 10:44:17,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454609544] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:44:17,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:44:17,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-24 10:44:17,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397224032] [2021-10-24 10:44:17,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:44:17,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:44:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:44:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:44:17,255 INFO L87 Difference]: Start difference. First operand 997 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-10-24 10:44:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:44:17,572 INFO L93 Difference]: Finished difference Result 1210 states and 1415 transitions. [2021-10-24 10:44:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:44:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 151 [2021-10-24 10:44:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:44:17,574 INFO L225 Difference]: With dead ends: 1210 [2021-10-24 10:44:17,574 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:44:17,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:44:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:44:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:44:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-24 10:44:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:44:17,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 151 [2021-10-24 10:44:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:44:17,576 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:44:17,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-10-24 10:44:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:44:17,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:44:17,580 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:44:17,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:44:17,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-24 10:44:17,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:44:17,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:44:17,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:44:17,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:44:18,097 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-24 10:44:18,097 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-24 10:44:18,097 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-24 10:44:18,097 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-24 10:44:18,097 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-24 10:44:18,098 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-24 10:44:18,100 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-24 10:44:18,101 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-24 10:44:18,101 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-24 10:44:18,101 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-24 10:44:18,101 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-24 10:44:18,102 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-24 10:44:18,102 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-24 10:44:18,102 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-24 10:44:18,102 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-24 10:44:18,103 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-24 10:44:18,103 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-24 10:44:18,103 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-24 10:44:18,103 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-24 10:44:18,105 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-24 10:44:18,105 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-24 10:44:18,105 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-24 10:44:18,105 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-24 10:44:18,106 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-24 10:44:18,106 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-24 10:44:18,106 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-24 10:44:18,106 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-24 10:44:18,106 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-24 10:44:18,106 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-24 10:44:18,107 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-24 10:44:18,107 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:44:18,107 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-24 10:44:18,108 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-24 10:44:18,109 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-24 10:44:18,110 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (<= ~a16~0 5)) (.cse4 (<= ~a21~0 0)) (.cse0 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse3 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and (= ~a12~0 8) (<= 6 ~a16~0) .cse1 (= ~a17~0 1) .cse3) (and .cse4 .cse2) (and .cse4 .cse3) (and .cse1 (<= 15 ~a8~0)) (and .cse1 (<= ~a16~0 4)) (and .cse0 .cse1 .cse3))) [2021-10-24 10:44:18,110 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-24 10:44:18,110 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-24 10:44:18,111 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-24 10:44:18,111 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-24 10:44:18,111 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-24 10:44:18,111 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-24 10:44:18,111 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-24 10:44:18,111 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:44:18,112 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-24 10:44:18,112 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-24 10:44:18,112 INFO L857 garLoopResultBuilder]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2021-10-24 10:44:18,112 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-24 10:44:18,112 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-24 10:44:18,113 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-24 10:44:18,114 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-24 10:44:18,114 INFO L857 garLoopResultBuilder]: For program point L491-1(lines 40 585) no Hoare annotation was computed. [2021-10-24 10:44:18,114 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-24 10:44:18,114 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-24 10:44:18,115 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-24 10:44:18,115 INFO L857 garLoopResultBuilder]: For program point L492(line 492) no Hoare annotation was computed. [2021-10-24 10:44:18,115 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-24 10:44:18,115 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-24 10:44:18,115 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-24 10:44:18,116 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-24 10:44:18,116 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-24 10:44:18,116 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-24 10:44:18,116 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (<= ~a16~0 5)) (.cse4 (<= ~a21~0 0)) (.cse0 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse3 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and (= ~a12~0 8) (<= 6 ~a16~0) .cse1 (= ~a17~0 1) .cse3) (and .cse4 .cse2) (and .cse4 .cse3) (and .cse1 (<= 15 ~a8~0)) (and .cse1 (<= ~a16~0 4)) (and .cse0 .cse1 .cse3))) [2021-10-24 10:44:18,116 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-24 10:44:18,117 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 492) no Hoare annotation was computed. [2021-10-24 10:44:18,117 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-24 10:44:18,117 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-24 10:44:18,117 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-24 10:44:18,117 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-24 10:44:18,118 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-24 10:44:18,118 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-24 10:44:18,123 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:44:18,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:44:18 BoogieIcfgContainer [2021-10-24 10:44:18,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:44:18,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:44:18,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:44:18,173 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:44:18,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:44:08" (3/4) ... [2021-10-24 10:44:18,178 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:44:18,216 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-24 10:44:18,219 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-24 10:44:18,221 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-24 10:44:18,223 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:44:18,412 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:44:18,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:44:18,414 INFO L168 Benchmark]: Toolchain (without parser) took 12629.26 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 71.2 MB in the beginning and 157.0 MB in the end (delta: -85.9 MB). Peak memory consumption was 93.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,414 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory was 89.9 MB in the beginning and 89.8 MB in the end (delta: 64.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:44:18,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 759.60 ms. Allocated memory is still 111.1 MB. Free memory was 71.0 MB in the beginning and 68.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.79 ms. Allocated memory is still 111.1 MB. Free memory was 68.9 MB in the beginning and 63.3 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,416 INFO L168 Benchmark]: Boogie Preprocessor took 125.94 ms. Allocated memory is still 111.1 MB. Free memory was 63.3 MB in the beginning and 59.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,416 INFO L168 Benchmark]: RCFGBuilder took 2084.68 ms. Allocated memory was 111.1 MB in the beginning and 138.4 MB in the end (delta: 27.3 MB). Free memory was 58.7 MB in the beginning and 64.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,417 INFO L168 Benchmark]: TraceAbstraction took 9313.78 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 64.7 MB in the beginning and 44.6 MB in the end (delta: 20.2 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,417 INFO L168 Benchmark]: Witness Printer took 239.37 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 44.6 MB in the beginning and 157.0 MB in the end (delta: -112.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:44:18,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory was 89.9 MB in the beginning and 89.8 MB in the end (delta: 64.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 759.60 ms. Allocated memory is still 111.1 MB. Free memory was 71.0 MB in the beginning and 68.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 96.79 ms. Allocated memory is still 111.1 MB. Free memory was 68.9 MB in the beginning and 63.3 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 125.94 ms. Allocated memory is still 111.1 MB. Free memory was 63.3 MB in the beginning and 59.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2084.68 ms. Allocated memory was 111.1 MB in the beginning and 138.4 MB in the end (delta: 27.3 MB). Free memory was 58.7 MB in the beginning and 64.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9313.78 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 64.7 MB in the beginning and 44.6 MB in the end (delta: 20.2 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. * Witness Printer took 239.37 ms. Allocated memory was 167.8 MB in the beginning and 201.3 MB in the end (delta: 33.6 MB). Free memory was 44.6 MB in the beginning and 157.0 MB in the end (delta: -112.5 MB). Peak memory consumption was 10.2 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 492]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9179.0ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 67.0ms, AutomataDifference: 4161.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 302.6ms, InitialAbstractionConstructionTime: 16.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 481 SDtfs, 610 SDslu, 43 SDs, 0 SdLazy, 2260 SolverSat, 513 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2815.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 590 GetRequests, 571 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1068occurred in iteration=7, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 358.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 568 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 131 HoareAnnotationTreeSize, 3 FomulaSimplifications, 896 FormulaSimplificationTreeSizeReduction, 66.8ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 124 FormulaSimplificationTreeSizeReductionInter, 226.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 157.5ms SsaConstructionTime, 429.2ms SatisfiabilityAnalysisTime, 2768.1ms InterpolantComputationTime, 1295 NumberOfCodeBlocks, 1295 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1564 ConstructedInterpolants, 0 QuantifiedInterpolants, 4816 SizeOfPredicates, 0 NumberOfNonLiveVariables, 689 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 780/792 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((14 <= a8 && a21 == 1) && a16 <= 5) || ((((a12 == 8 && 6 <= a16) && a21 == 1) && a17 == 1) && a20 == 1)) || (a21 <= 0 && a16 <= 5)) || (a21 <= 0 && a20 == 1)) || (a21 == 1 && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || ((14 <= a8 && a21 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((14 <= a8 && a21 == 1) && a16 <= 5) || ((((a12 == 8 && 6 <= a16) && a21 == 1) && a17 == 1) && a20 == 1)) || (a21 <= 0 && a16 <= 5)) || (a21 <= 0 && a20 == 1)) || (a21 == 1 && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || ((14 <= a8 && a21 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-24 10:44:18,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d9917c-c9f8-4432-a204-d670a70b08b1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...