./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8 --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 9c20edfd7ede05443471560aa2c7be34d4e8c171 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8 --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 9c20edfd7ede05443471560aa2c7be34d4e8c171 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:45:32,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:45:32,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:45:32,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:45:32,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:45:32,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:45:32,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:45:32,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:45:32,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:45:32,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:45:32,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:45:32,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:45:32,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:45:32,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:45:32,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:45:32,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:45:32,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:45:32,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:45:32,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:45:32,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:45:32,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:45:32,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:45:32,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:45:32,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:45:32,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:45:32,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:45:32,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:45:32,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:45:32,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:45:32,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:45:32,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:45:32,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:45:32,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:45:32,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:45:32,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:45:32,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:45:32,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:45:32,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:45:32,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:45:32,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:45:32,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:45:32,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:45:32,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:45:32,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:45:32,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:45:32,480 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:45:32,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:45:32,481 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:45:32,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:45:32,481 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:45:32,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:45:32,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:45:32,489 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:45:32,489 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:45:32,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:45:32,490 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:45:32,490 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:45:32,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:45:32,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:45:32,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:45:32,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:45:32,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:45:32,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:45:32,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:45:32,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:45:32,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:45:32,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:45:32,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:45:32,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:45:32,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:45:32,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:45:32,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:45:32,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:45:32,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:45:32,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:45:32,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:45:32,495 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:45:32,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:45:32,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:45:32,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:45:32,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:45:32,496 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_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2021-10-13 07:45:32,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:45:32,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:45:32,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:45:32,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:45:32,813 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:45:32,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/gcd_4.c [2021-10-13 07:45:32,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/8e2f6464e/15f985fcf53b4a51b2aae4af21268b3d/FLAG26cd61076 [2021-10-13 07:45:33,421 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:45:33,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/sv-benchmarks/c/bitvector/gcd_4.c [2021-10-13 07:45:33,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/8e2f6464e/15f985fcf53b4a51b2aae4af21268b3d/FLAG26cd61076 [2021-10-13 07:45:33,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/8e2f6464e/15f985fcf53b4a51b2aae4af21268b3d [2021-10-13 07:45:33,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:45:33,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:45:33,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:45:33,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:45:33,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:45:33,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:33" (1/1) ... [2021-10-13 07:45:33,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6b2ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:33, skipping insertion in model container [2021-10-13 07:45:33,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:33" (1/1) ... [2021-10-13 07:45:33,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:45:33,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:45:34,005 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_4c1f823a-7800-45cc-9f57-221633b0b7d4/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-13 07:45:34,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:45:34,059 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:45:34,072 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_4c1f823a-7800-45cc-9f57-221633b0b7d4/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-13 07:45:34,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:45:34,103 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:45:34,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34 WrapperNode [2021-10-13 07:45:34,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:45:34,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:45:34,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:45:34,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:45:34,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:45:34,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:45:34,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:45:34,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:45:34,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:45:34,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:45:34,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:45:34,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:45:34,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (1/1) ... [2021-10-13 07:45:34,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:45:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:34,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:45:34,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:45:34,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:45:34,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:45:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:45:34,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:45:34,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:45:34,710 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 07:45:34,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:34 BoogieIcfgContainer [2021-10-13 07:45:34,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:45:34,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:45:34,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:45:34,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:45:34,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:45:33" (1/3) ... [2021-10-13 07:45:34,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543db41c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:34, skipping insertion in model container [2021-10-13 07:45:34,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:34" (2/3) ... [2021-10-13 07:45:34,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543db41c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:34, skipping insertion in model container [2021-10-13 07:45:34,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:34" (3/3) ... [2021-10-13 07:45:34,723 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-10-13 07:45:34,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:45:34,729 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:45:34,779 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:45:34,786 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, mConcurrency=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 [2021-10-13 07:45:34,786 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:45:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:45:34,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:34,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:45:34,808 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:34,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash 109521743, now seen corresponding path program 1 times [2021-10-13 07:45:34,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:45:34,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915786675] [2021-10-13 07:45:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:34,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:45:34,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:45:34,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908061976] [2021-10-13 07:45:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:34,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:34,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:34,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:45:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:35,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:45:35,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:35,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:35,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:45:35,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915786675] [2021-10-13 07:45:35,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:45:35,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908061976] [2021-10-13 07:45:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908061976] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:45:35,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:45:35,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:45:35,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422673731] [2021-10-13 07:45:35,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:45:35,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:45:35,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:45:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:35,198 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:35,233 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-13 07:45:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:45:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:45:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:35,246 INFO L225 Difference]: With dead ends: 46 [2021-10-13 07:45:35,247 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 07:45:35,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 07:45:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 15. [2021-10-13 07:45:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-10-13 07:45:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-13 07:45:35,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2021-10-13 07:45:35,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:35,309 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-13 07:45:35,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-13 07:45:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:45:35,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:35,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:45:35,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:45:35,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:35,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash -896668108, now seen corresponding path program 1 times [2021-10-13 07:45:35,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:45:35,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712289619] [2021-10-13 07:45:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:35,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:45:35,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:45:35,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097757841] [2021-10-13 07:45:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:35,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:35,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:35,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:35,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:45:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:35,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:45:35,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:35,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:35,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:45:35,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712289619] [2021-10-13 07:45:35,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:45:35,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097757841] [2021-10-13 07:45:35,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097757841] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:45:35,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:45:35,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:45:35,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114845925] [2021-10-13 07:45:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:45:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:45:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:45:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:35,690 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 07:45:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:35,699 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-13 07:45:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:45:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:45:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:35,700 INFO L225 Difference]: With dead ends: 28 [2021-10-13 07:45:35,701 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 07:45:35,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 07:45:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 07:45:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-13 07:45:35,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 6 [2021-10-13 07:45:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:35,706 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-13 07:45:35,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 07:45:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-13 07:45:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:45:35,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:35,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:35,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 07:45:35,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:35,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2027476501, now seen corresponding path program 1 times [2021-10-13 07:45:35,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:45:35,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077428660] [2021-10-13 07:45:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:35,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:45:35,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:45:35,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111724642] [2021-10-13 07:45:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:35,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:35,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:35,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:45:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:36,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:45:36,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:36,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:36,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:45:36,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077428660] [2021-10-13 07:45:36,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:45:36,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111724642] [2021-10-13 07:45:36,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111724642] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:36,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263369432] [2021-10-13 07:45:36,188 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 07:45:36,189 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:45:36,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:45:36,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:45:36,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:45:36,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,235 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:45:36,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:45:36,240 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:45:36,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:45:36,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-13 07:45:36,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:36,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:45:36,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:45:36,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:45:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:45:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:45:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:45:36,369 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 07:45:36,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 07:45:36,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:45:36,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:45:36,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 07:45:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:36,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:36,383 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:45:36,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:45:36,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 07:45:36,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:36,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:45:36,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:45:36,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:45:36,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-13 07:45:36,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:45:36,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:45:36,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-13 07:45:36,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:45:36,442 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:569, output treesize:126 [2021-10-13 07:45:36,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:36,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:36,664 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:45:36,667 INFO L168 Benchmark]: Toolchain (without parser) took 2890.15 ms. Allocated memory is still 146.8 MB. Free memory was 113.3 MB in the beginning and 78.0 MB in the end (delta: 35.3 MB). Peak memory consumption was 32.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:36,668 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:45:36,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.69 ms. Allocated memory is still 146.8 MB. Free memory was 113.3 MB in the beginning and 120.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:36,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.39 ms. Allocated memory is still 146.8 MB. Free memory was 120.9 MB in the beginning and 119.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:36,669 INFO L168 Benchmark]: Boogie Preprocessor took 48.15 ms. Allocated memory is still 146.8 MB. Free memory was 119.2 MB in the beginning and 118.2 MB in the end (delta: 991.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:45:36,670 INFO L168 Benchmark]: RCFGBuilder took 514.82 ms. Allocated memory is still 146.8 MB. Free memory was 118.2 MB in the beginning and 104.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:36,671 INFO L168 Benchmark]: TraceAbstraction took 1951.13 ms. Allocated memory is still 146.8 MB. Free memory was 104.1 MB in the beginning and 78.0 MB in the end (delta: 26.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:36,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.69 ms. Allocated memory is still 146.8 MB. Free memory was 113.3 MB in the beginning and 120.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.39 ms. Allocated memory is still 146.8 MB. Free memory was 120.9 MB in the beginning and 119.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.15 ms. Allocated memory is still 146.8 MB. Free memory was 119.2 MB in the beginning and 118.2 MB in the end (delta: 991.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 514.82 ms. Allocated memory is still 146.8 MB. Free memory was 118.2 MB in the beginning and 104.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1951.13 ms. Allocated memory is still 146.8 MB. Free memory was 104.1 MB in the beginning and 78.0 MB in the end (delta: 26.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:45:36,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:45:39,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:45:39,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:45:39,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:45:39,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:45:39,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:45:39,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:45:39,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:45:39,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:45:39,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:45:39,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:45:39,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:45:39,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:45:39,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:45:39,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:45:39,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:45:39,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:45:39,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:45:39,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:45:39,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:45:39,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:45:39,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:45:39,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:45:39,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:45:39,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:45:39,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:45:39,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:45:39,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:45:39,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:45:39,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:45:39,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:45:39,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:45:39,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:45:39,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:45:39,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:45:39,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:45:39,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:45:39,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:45:39,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:45:39,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:45:39,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:45:39,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:45:39,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:45:39,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:45:39,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:45:39,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:45:39,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:45:39,357 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:45:39,358 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:45:39,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:45:39,358 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:45:39,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:45:39,362 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:45:39,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:45:39,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:45:39,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:45:39,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:45:39,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:45:39,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:45:39,363 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:45:39,363 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:45:39,364 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:45:39,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:45:39,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:45:39,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:45:39,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:45:39,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:45:39,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:45:39,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:45:39,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:45:39,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:45:39,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:45:39,366 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:45:39,366 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:39,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:45:39,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:45:39,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:45:39,368 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2021-10-13 07:45:39,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:45:39,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:45:39,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:45:39,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:45:39,769 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:45:39,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/gcd_4.c [2021-10-13 07:45:39,837 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/19c0b9107/16b97b57253f418fb920e80a1299104e/FLAG853fe2afa [2021-10-13 07:45:40,406 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:45:40,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/sv-benchmarks/c/bitvector/gcd_4.c [2021-10-13 07:45:40,417 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/19c0b9107/16b97b57253f418fb920e80a1299104e/FLAG853fe2afa [2021-10-13 07:45:40,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/data/19c0b9107/16b97b57253f418fb920e80a1299104e [2021-10-13 07:45:40,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:45:40,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:45:40,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:45:40,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:45:40,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:45:40,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:40" (1/1) ... [2021-10-13 07:45:40,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51790dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:40, skipping insertion in model container [2021-10-13 07:45:40,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:40" (1/1) ... [2021-10-13 07:45:40,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:45:40,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:45:41,004 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_4c1f823a-7800-45cc-9f57-221633b0b7d4/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-13 07:45:41,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:45:41,049 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:45:41,112 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_4c1f823a-7800-45cc-9f57-221633b0b7d4/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-13 07:45:41,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:45:41,144 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:45:41,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41 WrapperNode [2021-10-13 07:45:41,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:45:41,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:45:41,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:45:41,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:45:41,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:45:41,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:45:41,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:45:41,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:45:41,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:45:41,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:45:41,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:45:41,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:45:41,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (1/1) ... [2021-10-13 07:45:41,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:45:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:41,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:45:41,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:45:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:45:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:45:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:45:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:45:41,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:45:41,693 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 07:45:41,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:41 BoogieIcfgContainer [2021-10-13 07:45:41,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:45:41,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:45:41,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:45:41,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:45:41,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:45:40" (1/3) ... [2021-10-13 07:45:41,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddeaeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:41, skipping insertion in model container [2021-10-13 07:45:41,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:41" (2/3) ... [2021-10-13 07:45:41,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddeaeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:41, skipping insertion in model container [2021-10-13 07:45:41,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:41" (3/3) ... [2021-10-13 07:45:41,702 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-10-13 07:45:41,707 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:45:41,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:45:41,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:45:41,795 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, mConcurrency=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 [2021-10-13 07:45:41,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:45:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 23 states have internal predecessors, (32), 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) [2021-10-13 07:45:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:45:41,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:41,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:41,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 121403650, now seen corresponding path program 1 times [2021-10-13 07:45:41,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:41,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909713684] [2021-10-13 07:45:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:41,854 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:41,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:41,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:45:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:42,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:45:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:42,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:42,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:42,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909713684] [2021-10-13 07:45:42,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909713684] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:45:42,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:45:42,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:45:42,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163600320] [2021-10-13 07:45:42,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:45:42,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:45:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:42,177 INFO L87 Difference]: Start difference. First operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 23 states have internal predecessors, (32), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 07:45:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:42,222 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-10-13 07:45:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:45:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 8 [2021-10-13 07:45:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:42,232 INFO L225 Difference]: With dead ends: 64 [2021-10-13 07:45:42,232 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 07:45:42,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 07:45:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-10-13 07:45:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-13 07:45:42,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2021-10-13 07:45:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:42,263 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-13 07:45:42,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 07:45:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-13 07:45:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:45:42,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:42,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:42,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:42,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:45:42,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -60379342, now seen corresponding path program 1 times [2021-10-13 07:45:42,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:42,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526224840] [2021-10-13 07:45:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:42,483 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:42,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:42,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:42,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:45:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:45:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:42,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:42,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:42,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526224840] [2021-10-13 07:45:42,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526224840] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:45:42,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:45:42,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:45:42,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491482633] [2021-10-13 07:45:42,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:45:42,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:45:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:42,674 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-13 07:45:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:42,701 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-13 07:45:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:45:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 10 [2021-10-13 07:45:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:42,703 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:45:42,703 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 07:45:42,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 07:45:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 07:45:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-10-13 07:45:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-13 07:45:42,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-10-13 07:45:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:42,709 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-13 07:45:42,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-13 07:45:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-13 07:45:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:45:42,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:42,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:42,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:45:42,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 108865487, now seen corresponding path program 1 times [2021-10-13 07:45:42,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:42,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795302710] [2021-10-13 07:45:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:42,926 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:42,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:42,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:45:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:43,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:45:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:43,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:43,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:43,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795302710] [2021-10-13 07:45:43,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795302710] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:45:43,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:45:43,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:45:43,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280970393] [2021-10-13 07:45:43,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:45:43,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:45:43,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:43,213 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-13 07:45:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:43,247 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-10-13 07:45:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:45:43,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:45:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:43,249 INFO L225 Difference]: With dead ends: 41 [2021-10-13 07:45:43,249 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:45:43,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:45:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:45:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 07:45:43,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-13 07:45:43,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-10-13 07:45:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:43,256 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-13 07:45:43,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-13 07:45:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-13 07:45:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:45:43,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:43,257 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:43,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:45:43,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:45:43,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1930473527, now seen corresponding path program 1 times [2021-10-13 07:45:43,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:43,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716265446] [2021-10-13 07:45:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:43,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:43,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:43,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:45:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:43,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:45:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:43,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:44,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:44,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716265446] [2021-10-13 07:45:44,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716265446] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:44,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [166332989] [2021-10-13 07:45:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:44,100 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:45:44,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:45:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:45:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:45:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:44,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:44,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [166332989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795638379] [2021-10-13 07:45:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:44,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:44,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:44,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:45:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:44,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:45:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:44,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:45,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795638379] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:45,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:45:45,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 13 [2021-10-13 07:45:45,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099561131] [2021-10-13 07:45:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:45:45,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:45:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:45:45,329 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:45,627 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-10-13 07:45:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:45:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:45:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:45,632 INFO L225 Difference]: With dead ends: 50 [2021-10-13 07:45:45,632 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 07:45:45,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:45:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 07:45:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-10-13 07:45:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-10-13 07:45:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-13 07:45:45,639 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2021-10-13 07:45:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:45,640 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-13 07:45:45,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-13 07:45:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:45:45,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:45,641 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:45,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:45,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:46,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:46,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:46,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:46,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1921301375, now seen corresponding path program 2 times [2021-10-13 07:45:46,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:46,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849193794] [2021-10-13 07:45:46,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:45:46,255 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:46,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:46,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:46,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:45:46,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:45:46,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:45:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:45:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:45:46,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:45:51,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:51,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849193794] [2021-10-13 07:45:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849193794] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:51,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80672562] [2021-10-13 07:45:51,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:45:51,148 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:45:51,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:45:51,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:45:51,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:45:51,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:45:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:45:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:45:51,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:45:52,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80672562] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:52,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248484271] [2021-10-13 07:45:52,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:45:52,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:52,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:52,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:45:53,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:45:53,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:45:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:45:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:45:53,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:46:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:46:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248484271] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:46:02,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:46:02,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 10] total 19 [2021-10-13 07:46:02,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64064157] [2021-10-13 07:46:02,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 07:46:02,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:46:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 07:46:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-10-13 07:46:02,547 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 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) [2021-10-13 07:46:27,272 WARN L207 SmtUtils]: Spent 17.46 s on a formula simplification that was a NOOP. DAG size: 29 [2021-10-13 07:47:15,079 WARN L207 SmtUtils]: Spent 7.93 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-13 07:47:31,671 WARN L207 SmtUtils]: Spent 10.07 s on a formula simplification that was a NOOP. DAG size: 24 [2021-10-13 07:47:47,831 WARN L207 SmtUtils]: Spent 11.91 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-13 07:48:02,282 WARN L207 SmtUtils]: Spent 9.23 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-13 07:48:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:48:02,285 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-10-13 07:48:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 07:48:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 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 20 [2021-10-13 07:48:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:48:02,287 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:48:02,287 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 07:48:02,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 109648.9ms TimeCoverageRelationStatistics Valid=265, Invalid=726, Unknown=1, NotChecked=0, Total=992 [2021-10-13 07:48:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 07:48:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2021-10-13 07:48:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:48:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-10-13 07:48:02,298 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 20 [2021-10-13 07:48:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:48:02,298 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-10-13 07:48:02,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 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) [2021-10-13 07:48:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-10-13 07:48:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:48:02,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:48:02,300 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:48:02,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:48:02,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:48:02,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:48:02,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:48:02,910 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:48:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:48:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash 465472356, now seen corresponding path program 1 times [2021-10-13 07:48:02,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:48:02,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007519638] [2021-10-13 07:48:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:48:02,911 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:48:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:48:02,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:48:02,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:48:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:48:03,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:48:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:48:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:48:03,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:48:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:48:10,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:48:10,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007519638] [2021-10-13 07:48:10,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007519638] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:48:10,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845785184] [2021-10-13 07:48:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:48:10,319 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:48:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:48:10,329 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:48:10,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:48:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:48:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:48:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:48:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:48:11,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:48:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:48:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845785184] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:48:13,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419754332] [2021-10-13 07:48:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:48:13,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:48:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:48:13,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:48:13,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:48:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:48:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:48:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:48:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:48:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:48:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:48:49,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419754332] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:48:49,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:48:49,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 12] total 30 [2021-10-13 07:48:49,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968736739] [2021-10-13 07:48:49,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 07:48:49,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:48:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 07:48:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-10-13 07:48:49,186 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-10-13 07:49:05,439 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 40 [2021-10-13 07:49:56,165 WARN L207 SmtUtils]: Spent 7.43 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-13 07:50:12,795 WARN L207 SmtUtils]: Spent 10.69 s on a formula simplification that was a NOOP. DAG size: 24 [2021-10-13 07:50:28,867 WARN L207 SmtUtils]: Spent 10.72 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-13 07:50:43,264 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 44 [2021-10-13 07:51:03,596 WARN L207 SmtUtils]: Spent 12.51 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-13 07:51:23,101 WARN L207 SmtUtils]: Spent 10.30 s on a formula simplification that was a NOOP. DAG size: 51 [2021-10-13 07:51:38,987 WARN L207 SmtUtils]: Spent 11.11 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-13 07:51:57,817 WARN L207 SmtUtils]: Spent 10.24 s on a formula simplification that was a NOOP. DAG size: 57 [2021-10-13 07:52:24,871 WARN L207 SmtUtils]: Spent 14.85 s on a formula simplification that was a NOOP. DAG size: 57 [2021-10-13 07:52:50,662 WARN L207 SmtUtils]: Spent 16.51 s on a formula simplification that was a NOOP. DAG size: 57 [2021-10-13 07:53:16,244 WARN L207 SmtUtils]: Spent 13.63 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-13 07:53:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:53:16,245 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2021-10-13 07:53:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 07:53:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 22 [2021-10-13 07:53:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:53:16,247 INFO L225 Difference]: With dead ends: 95 [2021-10-13 07:53:16,247 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 07:53:16,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 277594.8ms TimeCoverageRelationStatistics Valid=524, Invalid=2024, Unknown=2, NotChecked=0, Total=2550 [2021-10-13 07:53:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 07:53:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-10-13 07:53:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 65 states have internal predecessors, (84), 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) [2021-10-13 07:53:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-10-13 07:53:16,268 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 22 [2021-10-13 07:53:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:53:16,269 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-10-13 07:53:16,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-10-13 07:53:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-10-13 07:53:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:53:16,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:53:16,270 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:53:16,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:53:16,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:53:16,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-13 07:53:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:53:16,872 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:53:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:53:16,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1401524834, now seen corresponding path program 3 times [2021-10-13 07:53:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:53:16,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583401515] [2021-10-13 07:53:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:53:16,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:53:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:53:16,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:53:16,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:53:17,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 07:53:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:53:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:53:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:53:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:53:17,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:53:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:53:18,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:53:18,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583401515] [2021-10-13 07:53:18,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583401515] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:53:18,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1522452332] [2021-10-13 07:53:18,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:53:18,926 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:53:18,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:53:18,927 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:53:18,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:53:19,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 07:53:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:53:19,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:53:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:53:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:53:20,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:53:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:53:20,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1522452332] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:53:20,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892079788] [2021-10-13 07:53:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:53:20,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:53:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:53:20,249 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:53:20,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:53:20,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 07:53:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:53:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:53:20,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:53:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:53:21,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:53:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:53:21,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892079788] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:53:21,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:53:21,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 9] total 17 [2021-10-13 07:53:21,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285953944] [2021-10-13 07:53:21,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:53:21,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:53:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:53:21,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:53:21,335 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:53:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:53:23,294 INFO L93 Difference]: Finished difference Result 128 states and 163 transitions. [2021-10-13 07:53:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:53:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 07:53:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:53:23,298 INFO L225 Difference]: With dead ends: 128 [2021-10-13 07:53:23,298 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 07:53:23,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2664.7ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-10-13 07:53:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 07:53:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-13 07:53:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 63 states have internal predecessors, (82), 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) [2021-10-13 07:53:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2021-10-13 07:53:23,313 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 22 [2021-10-13 07:53:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:53:23,313 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2021-10-13 07:53:23,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:53:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2021-10-13 07:53:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:53:23,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:53:23,315 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:53:23,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-13 07:53:23,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:53:23,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:53:23,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:53:23,929 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:53:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:53:23,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1162394260, now seen corresponding path program 4 times [2021-10-13 07:53:23,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:53:23,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637126680] [2021-10-13 07:53:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:53:23,930 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:53:23,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:53:23,931 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:53:23,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:53:24,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:53:24,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:53:24,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:53:24,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:53:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:53:24,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:53:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:53:25,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:53:25,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637126680] [2021-10-13 07:53:25,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637126680] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:53:25,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190106274] [2021-10-13 07:53:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:53:25,630 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:53:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:53:25,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:53:25,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:53:26,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:53:26,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:53:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:53:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:53:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:53:26,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:53:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:53:26,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [190106274] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:53:26,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945245519] [2021-10-13 07:53:26,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:53:26,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:53:26,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:53:26,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:53:26,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:53:26,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:53:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:53:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:53:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:53:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:53:27,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:53:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:53:35,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945245519] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:53:35,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:53:35,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 10] total 20 [2021-10-13 07:53:35,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011545447] [2021-10-13 07:53:35,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:53:35,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:53:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:53:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=280, Unknown=1, NotChecked=0, Total=380 [2021-10-13 07:53:35,207 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:53:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:53:35,729 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-10-13 07:53:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:53:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 07:53:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:53:35,730 INFO L225 Difference]: With dead ends: 64 [2021-10-13 07:53:35,730 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:53:35,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 7457.5ms TimeCoverageRelationStatistics Valid=109, Invalid=310, Unknown=1, NotChecked=0, Total=420 [2021-10-13 07:53:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:53:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:53:35,732 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) [2021-10-13 07:53:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:53:35,732 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-13 07:53:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:53:35,733 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:53:35,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:53:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:53:35,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:53:35,736 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:53:35,736 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:53:35,736 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:53:35,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:53:35,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 07:53:36,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:53:36,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:53:36,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:53:36,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:53:36,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:53:36,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:53:36,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:53:36,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:53:36,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:53:51,384 WARN L207 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-10-13 07:53:55,523 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-13 07:53:55,524 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 13 29) no Hoare annotation was computed. [2021-10-13 07:53:55,524 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-10-13 07:53:55,524 INFO L853 garLoopResultBuilder]: At program point L7-2(lines 6 11) the Hoare annotation is: (let ((.cse2 (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)))) (let ((.cse1 (bvadd .cse2 ULTIMATE.start_main_~x~0)) (.cse0 (bvneg ULTIMATE.start_gcd_test_~b))) (and (= (bvsrem ULTIMATE.start_main_~y~0 (bvadd (bvmul .cse0 (_ bv3 32)) ULTIMATE.start_gcd_test_~a)) (_ bv0 32)) (= .cse1 ULTIMATE.start_gcd_test_~a) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (= (_ bv18 32) ULTIMATE.start_main_~y~0) (= .cse1 |ULTIMATE.start_gcd_test_#res|) (= (_ bv0 32) (bvsrem ULTIMATE.start_main_~y~0 (bvadd ULTIMATE.start_gcd_test_~a .cse0))) (= ULTIMATE.start_main_~x~0 (_ bv63 32)) (= ULTIMATE.start_main_~g~0 (bvadd .cse2 (_ bv63 32)))))) [2021-10-13 07:53:55,525 INFO L857 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-10-13 07:53:55,525 INFO L853 garLoopResultBuilder]: At program point L7-5(lines 6 11) the Hoare annotation is: (let ((.cse2 (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)))) (let ((.cse1 (bvadd .cse2 ULTIMATE.start_main_~x~0)) (.cse0 (bvneg ULTIMATE.start_gcd_test_~b))) (and (= (bvsrem ULTIMATE.start_main_~y~0 (bvadd (bvmul .cse0 (_ bv3 32)) ULTIMATE.start_gcd_test_~a)) (_ bv0 32)) (= .cse1 ULTIMATE.start_gcd_test_~a) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (= (_ bv18 32) ULTIMATE.start_main_~y~0) (= .cse1 |ULTIMATE.start_gcd_test_#res|) (= (_ bv0 32) (bvsrem ULTIMATE.start_main_~y~0 (bvadd ULTIMATE.start_gcd_test_~a .cse0))) (= ULTIMATE.start_main_~x~0 (_ bv63 32)) (= ULTIMATE.start_main_~g~0 (bvadd .cse2 (_ bv63 32)))))) [2021-10-13 07:53:55,525 INFO L857 garLoopResultBuilder]: For program point L7-6(lines 7 9) no Hoare annotation was computed. [2021-10-13 07:53:55,525 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:53:55,525 INFO L860 garLoopResultBuilder]: At program point L7-8(lines 6 11) the Hoare annotation is: true [2021-10-13 07:53:55,526 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:53:55,526 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:53:55,526 INFO L853 garLoopResultBuilder]: At program point L28(lines 12 29) the Hoare annotation is: (let ((.cse0 (bvadd (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)) ULTIMATE.start_main_~x~0)) (.cse1 (bvneg ULTIMATE.start_gcd_test_~b))) (and (= .cse0 ULTIMATE.start_gcd_test_~a) (= (bvsrem ULTIMATE.start_main_~x~0 (bvadd (bvmul .cse1 (_ bv3 32)) ULTIMATE.start_gcd_test_~a)) (_ bv0 32)) (= (_ bv18 32) ULTIMATE.start_main_~y~0) (= .cse0 |ULTIMATE.start_gcd_test_#res|) (= (_ bv0 32) (bvsrem ULTIMATE.start_main_~y~0 (bvadd ULTIMATE.start_gcd_test_~a .cse1))) (= ULTIMATE.start_main_~x~0 (_ bv63 32)) (= (bvsrem ULTIMATE.start_main_~x~0 (bvadd ULTIMATE.start_gcd_test_~a (bvmul .cse1 (_ bv2 32)))) (_ bv0 32)))) [2021-10-13 07:53:55,526 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-13 07:53:55,527 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-10-13 07:53:55,527 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-10-13 07:53:55,527 INFO L857 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-10-13 07:53:55,527 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:53:55,527 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2021-10-13 07:53:55,528 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-13 07:53:55,528 INFO L857 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-10-13 07:53:55,528 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~y~0 ULTIMATE.start_gcd_test_~b)) (.cse3 (bvneg ULTIMATE.start_gcd_test_~b)) (.cse5 (= (bvadd (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)) ULTIMATE.start_main_~x~0) ULTIMATE.start_gcd_test_~a)) (.cse1 (= (_ bv18 32) ULTIMATE.start_main_~y~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (_ bv63 32)))) (or (let ((.cse2 (bvmul (_ bv2 32) .cse3))) (and .cse0 .cse1 (= ULTIMATE.start_gcd_test_~a (bvadd .cse2 ULTIMATE.start_main_~x~0)) (= (bvadd .cse2 (_ bv63 32)) ULTIMATE.start_gcd_test_~a))) (and (= (bvadd (_ bv18 32) (bvneg ULTIMATE.start_gcd_test_~a)) ULTIMATE.start_gcd_test_~b) .cse1 .cse4 (= ULTIMATE.start_gcd_test_~a (_ bv9 32))) (and .cse5 (= ULTIMATE.start_gcd_test_~a (bvadd (bvmul (_ bv3 32) .cse3) (_ bv63 32))) .cse1 .cse4) (and .cse0 (= ULTIMATE.start_gcd_test_~a (_ bv63 32)) .cse1 .cse4) (and .cse0 .cse1 (= ULTIMATE.start_gcd_test_~a (bvadd .cse3 (_ bv63 32))) .cse4) (and (= ULTIMATE.start_gcd_test_~b (_ bv0 32)) .cse5 .cse1 .cse4))) [2021-10-13 07:53:55,528 INFO L860 garLoopResultBuilder]: At program point L47(lines 32 48) the Hoare annotation is: true [2021-10-13 07:53:55,529 INFO L857 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-10-13 07:53:55,529 INFO L857 garLoopResultBuilder]: For program point L14-2(lines 13 29) no Hoare annotation was computed. [2021-10-13 07:53:55,533 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:53:55,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:53:55 BoogieIcfgContainer [2021-10-13 07:53:55,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:53:55,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:53:55,561 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:53:55,561 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:53:55,562 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:41" (3/4) ... [2021-10-13 07:53:55,565 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:53:55,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-13 07:53:55,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-13 07:53:55,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:53:55,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:53:55,605 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a && ~bvsrem32(x, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && ~bvsrem32(x, ~bvadd64(a, ~bvmul32(~bvneg32(b), 2bv32))) == 0bv32 [2021-10-13 07:53:55,605 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) [2021-10-13 07:53:55,606 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) [2021-10-13 07:53:55,617 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:53:55,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:53:55,618 INFO L168 Benchmark]: Toolchain (without parser) took 494839.66 ms. Allocated memory was 71.3 MB in the beginning and 98.6 MB in the end (delta: 27.3 MB). Free memory was 52.9 MB in the beginning and 44.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,619 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 71.3 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:53:55,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.78 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 53.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,620 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.63 ms. Allocated memory is still 71.3 MB. Free memory was 53.9 MB in the beginning and 52.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,620 INFO L168 Benchmark]: Boogie Preprocessor took 38.37 ms. Allocated memory is still 71.3 MB. Free memory was 52.4 MB in the beginning and 51.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,621 INFO L168 Benchmark]: RCFGBuilder took 462.69 ms. Allocated memory is still 71.3 MB. Free memory was 51.1 MB in the beginning and 41.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,621 INFO L168 Benchmark]: TraceAbstraction took 493864.39 ms. Allocated memory was 71.3 MB in the beginning and 98.6 MB in the end (delta: 27.3 MB). Free memory was 40.9 MB in the beginning and 48.1 MB in the end (delta: -7.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,622 INFO L168 Benchmark]: Witness Printer took 56.32 ms. Allocated memory is still 98.6 MB. Free memory was 48.1 MB in the beginning and 44.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:53:55,624 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 71.3 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.78 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 53.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.63 ms. Allocated memory is still 71.3 MB. Free memory was 53.9 MB in the beginning and 52.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.37 ms. Allocated memory is still 71.3 MB. Free memory was 52.4 MB in the beginning and 51.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 462.69 ms. Allocated memory is still 71.3 MB. Free memory was 51.1 MB in the beginning and 41.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 493864.39 ms. Allocated memory was 71.3 MB in the beginning and 98.6 MB in the end (delta: 27.3 MB). Free memory was 40.9 MB in the beginning and 48.1 MB in the end (delta: -7.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. * Witness Printer took 56.32 ms. Allocated memory is still 98.6 MB. Free memory was 48.1 MB in the beginning and 44.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: 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, 24 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 493749.2ms, OverallIterations: 8, TraceHistogramMax: 8, EmptinessCheckTime: 28.6ms, AutomataDifference: 389742.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 19185.6ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 569 SDslu, 533 SDs, 0 SdLazy, 859 SolverSat, 211 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 41908.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 705 GetRequests, 561 SyntacticMatches, 4 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 398048.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 73.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 75 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 19 NumberOfFragments, 267 HoareAnnotationTreeSize, 6 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 218.9ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 515 FormulaSimplificationTreeSizeReductionInter, 18960.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 115.3ms SsaConstructionTime, 1782.8ms SatisfiabilityAnalysisTime, 76238.1ms InterpolantComputationTime, 348 NumberOfCodeBlocks, 348 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 660 ConstructedInterpolants, 2 QuantifiedInterpolants, 5709 SizeOfPredicates, 113 NumberOfNonLiveVariables, 923 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 260/956 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 3 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((((~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a && ~bvsrem32(x, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && ~bvsrem32(x, ~bvadd64(a, ~bvmul32(~bvneg32(b), 2bv32))) == 0bv32 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((((y == b && 18bv32 == y) && a == ~bvadd64(~bvmul32(2bv32, ~bvneg32(b)), x)) && ~bvadd64(~bvmul32(2bv32, ~bvneg32(b)), 63bv32) == a) || (((~bvadd64(18bv32, ~bvneg32(a)) == b && 18bv32 == y) && x == 63bv32) && a == 9bv32)) || (((~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a && a == ~bvadd64(~bvmul32(3bv32, ~bvneg32(b)), 63bv32)) && 18bv32 == y) && x == 63bv32)) || (((y == b && a == 63bv32) && 18bv32 == y) && x == 63bv32)) || (((y == b && 18bv32 == y) && a == ~bvadd64(~bvneg32(b), 63bv32)) && x == 63bv32)) || (((b == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && 18bv32 == y) && x == 63bv32) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:53:55,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1f823a-7800-45cc-9f57-221633b0b7d4/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...