./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/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_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 ........................................................................................................................................................................................................................................................................................................................................................................................................ 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_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/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_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:41:32,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:41:32,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:41:32,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:41:32,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:41:32,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:41:32,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:41:32,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:41:32,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:41:32,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:41:32,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:41:32,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:41:32,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:41:32,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:41:32,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:41:32,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:41:32,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:41:32,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:41:32,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:41:32,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:41:32,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:41:32,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:41:32,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:41:32,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:41:32,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:41:32,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:41:32,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:41:32,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:41:32,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:41:32,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:41:32,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:41:32,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:41:32,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:41:32,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:41:32,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:41:32,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:41:32,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:41:32,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:41:32,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:41:32,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:41:32,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:41:32,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:41:32,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:41:32,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:41:32,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:41:32,472 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:41:32,472 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:41:32,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:41:32,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:41:32,473 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:41:32,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:41:32,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:41:32,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:41:32,476 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:41:32,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:41:32,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:41:32,477 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:41:32,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:41:32,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:41:32,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:41:32,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:41:32,480 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:41:32,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:41:32,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:41:32,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:41:32,481 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:41:32,481 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:41:32,482 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:41:32,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:41:32,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:41:32,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:41:32,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:41:32,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:41:32,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:41:32,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:41:32,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:41:32,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:41:32,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:41:32,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:41:32,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:41:32,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:41:32,508 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_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 [2021-10-13 07:41:32,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:41:32,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:41:32,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:41:32,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:41:32,937 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:41:32,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2021-10-13 07:41:33,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/32be18930/8a5225462bcd43298f653fbca77ba75d/FLAGe0aab71ed [2021-10-13 07:41:33,638 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:41:33,639 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2021-10-13 07:41:33,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/32be18930/8a5225462bcd43298f653fbca77ba75d/FLAGe0aab71ed [2021-10-13 07:41:34,020 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/32be18930/8a5225462bcd43298f653fbca77ba75d [2021-10-13 07:41:34,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:41:34,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:41:34,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:41:34,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:41:34,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:41:34,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5a223d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34, skipping insertion in model container [2021-10-13 07:41:34,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:41:34,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:41:34,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:41:34,258 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:41:34,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:41:34,297 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:41:34,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34 WrapperNode [2021-10-13 07:41:34,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:41:34,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:41:34,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:41:34,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:41:34,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:41:34,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:41:34,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:41:34,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:41:34,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:41:34,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:41:34,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:41:34,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:41:34,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (1/1) ... [2021-10-13 07:41:34,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:41:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:34,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:41:34,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:41:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:41:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:41:34,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:41:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:41:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:41:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:41:34,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:41:34,959 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:41:34,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:41:34 BoogieIcfgContainer [2021-10-13 07:41:34,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:41:34,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:41:34,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:41:34,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:41:34,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:41:34" (1/3) ... [2021-10-13 07:41:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d4fc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:41:34, skipping insertion in model container [2021-10-13 07:41:34,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:34" (2/3) ... [2021-10-13 07:41:34,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d4fc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:41:34, skipping insertion in model container [2021-10-13 07:41:34,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:41:34" (3/3) ... [2021-10-13 07:41:34,980 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-2.c [2021-10-13 07:41:34,987 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:41:34,987 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-13 07:41:35,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:41:35,093 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 07:41:35,094 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 07:41:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 11 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 07:41:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:41:35,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:35,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:41:35,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:35,168 INFO L82 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2021-10-13 07:41:35,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:41:35,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811506229] [2021-10-13 07:41:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:35,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:41:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:35,372 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 07:41:35,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:41:35,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811506229] [2021-10-13 07:41:35,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811506229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:35,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:41:35,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:41:35,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238901626] [2021-10-13 07:41:35,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:41:35,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:41:35,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:41:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:41:35,405 INFO L87 Difference]: Start difference. First operand has 12 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 11 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 07:41:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:35,437 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-13 07:41:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:41:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-13 07:41:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:35,449 INFO L225 Difference]: With dead ends: 11 [2021-10-13 07:41:35,449 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:41:35,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:41:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:41:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 07:41:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-13 07:41:35,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2021-10-13 07:41:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:35,487 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-13 07:41:35,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 07:41:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-13 07:41:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:41:35,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:35,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:41:35,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:41:35,490 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:35,491 INFO L82 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2021-10-13 07:41:35,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:41:35,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383000060] [2021-10-13 07:41:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:35,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:41:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:35,558 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 07:41:35,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:41:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383000060] [2021-10-13 07:41:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383000060] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:35,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:41:35,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:41:35,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21219915] [2021-10-13 07:41:35,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:41:35,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:41:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:41:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:41:35,564 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 07:41:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:35,586 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-13 07:41:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:41:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-13 07:41:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:35,588 INFO L225 Difference]: With dead ends: 12 [2021-10-13 07:41:35,588 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:41:35,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:41:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:41:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-13 07:41:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.625) internal successors, (13), 11 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 07:41:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-13 07:41:35,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2021-10-13 07:41:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:35,593 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-13 07:41:35,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 07:41:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-13 07:41:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:41:35,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:35,595 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-13 07:41:35,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:41:35,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 72376116, now seen corresponding path program 1 times [2021-10-13 07:41:35,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:41:35,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513331875] [2021-10-13 07:41:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:35,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:41:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:35,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:41:35,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513331875] [2021-10-13 07:41:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513331875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:41:35,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410306891] [2021-10-13 07:41:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:35,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:35,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:41:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:35,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:41:35,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:35,886 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:35,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:36,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:36,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410306891] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:36,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082352932] [2021-10-13 07:41:36,180 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-13 07:41:36,180 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:41:36,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:41:36,193 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:41:36,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:41:36,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,239 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:41:36,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:41:36,250 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:41:36,254 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-10-13 07:41:36,259 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:41:36,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:41:36,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:41:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:36,342 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:41:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:41:36,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:41:36,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:41:36,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:41:36,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:41:36,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:36,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-13 07:41:36,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:41:36,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:117, output treesize:105 [2021-10-13 07:41:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:36,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:36,647 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 07:41:36,651 INFO L168 Benchmark]: Toolchain (without parser) took 2624.33 ms. Allocated memory is still 98.6 MB. Free memory was 58.8 MB in the beginning and 56.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:41:36,651 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 74.8 MB in the end (delta: 80.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:41:36,652 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.66 ms. Allocated memory is still 98.6 MB. Free memory was 58.6 MB in the beginning and 49.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:41:36,653 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.69 ms. Allocated memory is still 98.6 MB. Free memory was 49.3 MB in the beginning and 47.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:41:36,654 INFO L168 Benchmark]: Boogie Preprocessor took 30.28 ms. Allocated memory is still 98.6 MB. Free memory was 47.8 MB in the beginning and 46.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:41:36,654 INFO L168 Benchmark]: RCFGBuilder took 586.72 ms. Allocated memory is still 98.6 MB. Free memory was 46.7 MB in the beginning and 69.9 MB in the end (delta: -23.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:41:36,655 INFO L168 Benchmark]: TraceAbstraction took 1678.97 ms. Allocated memory is still 98.6 MB. Free memory was 69.4 MB in the beginning and 56.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:41:36,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 74.8 MB in the end (delta: 80.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 270.66 ms. Allocated memory is still 98.6 MB. Free memory was 58.6 MB in the beginning and 49.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.69 ms. Allocated memory is still 98.6 MB. Free memory was 49.3 MB in the beginning and 47.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.28 ms. Allocated memory is still 98.6 MB. Free memory was 47.8 MB in the beginning and 46.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 586.72 ms. Allocated memory is still 98.6 MB. Free memory was 46.7 MB in the beginning and 69.9 MB in the end (delta: -23.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1678.97 ms. Allocated memory is still 98.6 MB. Free memory was 69.4 MB in the beginning and 56.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 16.3 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 07:41:36,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/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 07:41:39,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:41:39,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:41:39,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:41:39,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:41:39,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:41:39,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:41:39,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:41:39,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:41:39,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:41:39,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:41:39,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:41:39,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:41:39,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:41:39,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:41:39,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:41:39,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:41:39,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:41:39,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:41:39,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:41:39,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:41:39,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:41:39,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:41:39,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:41:39,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:41:39,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:41:39,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:41:39,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:41:39,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:41:39,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:41:39,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:41:39,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:41:39,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:41:39,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:41:39,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:41:39,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:41:39,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:41:39,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:41:39,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:41:39,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:41:39,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:41:39,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:41:39,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:41:39,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:41:39,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:41:39,904 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:41:39,904 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:41:39,905 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:41:39,905 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:41:39,905 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:41:39,905 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:41:39,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:41:39,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:41:39,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:41:39,909 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:41:39,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:41:39,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:41:39,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:41:39,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:41:39,911 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:41:39,911 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:41:39,911 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:41:39,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:41:39,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:41:39,912 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:41:39,912 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:41:39,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:41:39,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:41:39,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:41:39,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:41:39,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:41:39,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:41:39,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:41:39,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:41:39,914 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:41:39,915 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:39,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:41:39,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:41:39,915 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_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 [2021-10-13 07:41:40,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:41:40,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:41:40,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:41:40,399 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:41:40,400 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:41:40,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2021-10-13 07:41:40,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/5e45132a3/e3e9bfd2acb048aaa02d2d2ea3366022/FLAG61e135eda [2021-10-13 07:41:41,056 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:41:41,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2021-10-13 07:41:41,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/5e45132a3/e3e9bfd2acb048aaa02d2d2ea3366022/FLAG61e135eda [2021-10-13 07:41:41,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/data/5e45132a3/e3e9bfd2acb048aaa02d2d2ea3366022 [2021-10-13 07:41:41,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:41:41,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:41:41,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:41:41,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:41:41,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:41:41,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb2cb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41, skipping insertion in model container [2021-10-13 07:41:41,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:41:41,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:41:41,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:41:41,691 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:41:41,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:41:41,744 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:41:41,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41 WrapperNode [2021-10-13 07:41:41,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:41:41,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:41:41,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:41:41,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:41:41,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:41:41,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:41:41,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:41:41,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:41:41,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:41:41,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:41:41,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:41:41,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:41:41,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (1/1) ... [2021-10-13 07:41:41,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:41:41,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:41,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:41:42,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:41:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:41:42,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:41:42,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:41:42,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:41:42,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:41:42,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:41:42,486 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:41:42,496 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:41:42,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:41:42 BoogieIcfgContainer [2021-10-13 07:41:42,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:41:42,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:41:42,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:41:42,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:41:42,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:41:41" (1/3) ... [2021-10-13 07:41:42,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e16629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:41:42, skipping insertion in model container [2021-10-13 07:41:42,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:41:41" (2/3) ... [2021-10-13 07:41:42,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e16629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:41:42, skipping insertion in model container [2021-10-13 07:41:42,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:41:42" (3/3) ... [2021-10-13 07:41:42,510 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-2.c [2021-10-13 07:41:42,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:41:42,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-13 07:41:42,607 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:41:42,620 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 07:41:42,621 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 07:41:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:41:42,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:42,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:41:42,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-13 07:41:42,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:42,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603612150] [2021-10-13 07:41:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:42,704 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:42,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:42,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:41:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:41:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:43,019 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-13 07:41:43,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-13 07:41:43,170 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 07:41:43,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:43,195 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 07:41:43,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:43,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603612150] [2021-10-13 07:41:43,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603612150] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:43,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:41:43,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 07:41:43,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048824156] [2021-10-13 07:41:43,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:41:43,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:41:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:41:43,230 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 07:41:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:43,324 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-13 07:41:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:41:43,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-13 07:41:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:43,339 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:41:43,339 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:41:43,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:41:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:41:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 07:41:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 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 07:41:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-13 07:41:43,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2021-10-13 07:41:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:43,403 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-13 07:41:43,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 07:41:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-13 07:41:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:41:43,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:43,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:41:43,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:43,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:43,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-10-13 07:41:43,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:43,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443671797] [2021-10-13 07:41:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:43,622 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:43,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:43,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:43,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:41:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:41:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:43,776 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:43,950 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 07:41:43,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:44,240 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 07:41:44,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:44,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443671797] [2021-10-13 07:41:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443671797] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:44,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:41:44,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 07:41:44,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723053855] [2021-10-13 07:41:44,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:41:44,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:41:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:41:44,245 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:44,456 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-13 07:41:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:41:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:41:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:44,458 INFO L225 Difference]: With dead ends: 33 [2021-10-13 07:41:44,458 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:41:44,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:41:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:41:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-10-13 07:41:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) 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 07:41:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-13 07:41:44,463 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2021-10-13 07:41:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:44,463 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-13 07:41:44,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-13 07:41:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:41:44,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:44,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:41:44,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:44,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:44,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:44,666 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2021-10-13 07:41:44,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:44,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707686525] [2021-10-13 07:41:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:44,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:44,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:44,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:41:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:41:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:44,819 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 07:41:44,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:44,906 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 07:41:44,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:44,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707686525] [2021-10-13 07:41:44,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707686525] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1472490914] [2021-10-13 07:41:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:44,911 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:44,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:44,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:41:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:41:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:45,092 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 07:41:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:45,138 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 07:41:45,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1472490914] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:45,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600661452] [2021-10-13 07:41:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:45,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:45,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:45,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:41:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:45,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:41:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:45,333 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:41:45,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:41:46,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600661452] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:46,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:41:46,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4, 4, 4] total 12 [2021-10-13 07:41:46,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887726971] [2021-10-13 07:41:46,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:41:46,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:41:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:41:46,267 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:41:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:46,749 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-13 07:41:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:41:46,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:41:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:46,754 INFO L225 Difference]: With dead ends: 33 [2021-10-13 07:41:46,755 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:41:46,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:41:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:41:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-13 07:41:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 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 07:41:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-13 07:41:46,766 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-13 07:41:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:46,767 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-13 07:41:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:41:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-13 07:41:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:41:46,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:46,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:41:46,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-13 07:41:47,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 07:41:47,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:47,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash 741359649, now seen corresponding path program 1 times [2021-10-13 07:41:47,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:47,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762540420] [2021-10-13 07:41:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:47,373 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:47,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:47,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:41:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:41:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:47,535 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 07:41:47,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:47,614 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 07:41:47,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:47,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762540420] [2021-10-13 07:41:47,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762540420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:47,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595622166] [2021-10-13 07:41:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:47,617 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:47,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:47,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:41:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:47,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:41:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:47,812 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 07:41:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:47,871 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 07:41:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1595622166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:47,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437082512] [2021-10-13 07:41:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:47,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:47,893 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:47,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:41:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:48,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:41:48,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:48,078 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-13 07:41:48,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-13 07:41:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:41:48,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:41:48,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437082512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:48,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:41:48,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4, 4, 4] total 9 [2021-10-13 07:41:48,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167524968] [2021-10-13 07:41:48,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:41:48,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:48,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:41:48,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:41:48,350 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 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 07:41:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:48,464 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-10-13 07:41:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:41:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 10 [2021-10-13 07:41:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:48,466 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:41:48,466 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:41:48,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:41:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:41:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 07:41:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 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 07:41:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-13 07:41:48,471 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2021-10-13 07:41:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:48,472 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-13 07:41:48,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 07:41:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-13 07:41:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:41:48,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:48,473 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2021-10-13 07:41:48,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:48,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:48,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-13 07:41:49,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:49,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:49,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:49,075 INFO L82 PathProgramCache]: Analyzing trace with hash 742961990, now seen corresponding path program 1 times [2021-10-13 07:41:49,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:49,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321984978] [2021-10-13 07:41:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:49,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:49,078 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:49,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:41:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:41:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:49,229 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:49,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:49,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:50,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321984978] [2021-10-13 07:41:50,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321984978] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882757376] [2021-10-13 07:41:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:50,188 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:50,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:50,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:50,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:41:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:41:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:50,395 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:50,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:50,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882757376] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:50,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846934932] [2021-10-13 07:41:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:50,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:50,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:50,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:41:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:50,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:41:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:51,022 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:51,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:51,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:51,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846934932] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:51,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:41:51,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-10-13 07:41:51,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718792419] [2021-10-13 07:41:51,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:41:51,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:41:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:41:51,452 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 07:41:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:52,052 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-10-13 07:41:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:41:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 07:41:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:52,055 INFO L225 Difference]: With dead ends: 87 [2021-10-13 07:41:52,056 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 07:41:52,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 778.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:41:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 07:41:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 39. [2021-10-13 07:41:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 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 07:41:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-10-13 07:41:52,064 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 10 [2021-10-13 07:41:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:52,065 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-10-13 07:41:52,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 07:41:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-10-13 07:41:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:41:52,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:52,066 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:41:52,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:52,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:52,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:52,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:52,675 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash 770685883, now seen corresponding path program 1 times [2021-10-13 07:41:52,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:52,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788301354] [2021-10-13 07:41:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:52,676 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:52,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:52,678 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:52,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:41:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:41:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:41:52,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:41:53,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:53,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788301354] [2021-10-13 07:41:53,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788301354] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:53,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876600178] [2021-10-13 07:41:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:53,091 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:53,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:53,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:41:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:41:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 07:41:53,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 07:41:53,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876600178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:53,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:41:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 11 [2021-10-13 07:41:53,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637763195] [2021-10-13 07:41:53,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:41:53,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:41:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:41:53,542 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 07:41:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:53,566 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-13 07:41:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:41:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) Word has length 21 [2021-10-13 07:41:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:53,572 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:41:53,572 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:41:53,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:41:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:41:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 07:41:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 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 07:41:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-10-13 07:41:53,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2021-10-13 07:41:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-10-13 07:41:53,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 07:41:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-10-13 07:41:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:41:53,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:53,591 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2021-10-13 07:41:53,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:53,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:54,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:54,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:41:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash -620816058, now seen corresponding path program 2 times [2021-10-13 07:41:54,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:54,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010949730] [2021-10-13 07:41:54,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:41:54,007 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:54,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:54,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:41:54,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:41:54,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:41:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:41:54,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:54,219 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:54,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:54,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:57,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:57,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010949730] [2021-10-13 07:41:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010949730] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:57,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [416441297] [2021-10-13 07:41:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:41:57,541 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:57,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:57,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:41:57,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:41:57,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:41:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:41:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:57,887 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:41:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:41:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:58,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:00,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [416441297] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:00,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423576745] [2021-10-13 07:42:00,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:00,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:01,001 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:42:01,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:42:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:01,345 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:42:01,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:42:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:01,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:04,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423576745] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:04,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:04,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8, 8, 9] total 29 [2021-10-13 07:42:04,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279503328] [2021-10-13 07:42:04,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 07:42:04,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:04,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 07:42:04,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-10-13 07:42:04,694 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 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 07:42:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:12,363 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2021-10-13 07:42:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 07:42:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 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 07:42:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:12,371 INFO L225 Difference]: With dead ends: 151 [2021-10-13 07:42:12,371 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 07:42:12,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 12451.6ms TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 07:42:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 07:42:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 60. [2021-10-13 07:42:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 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 07:42:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-10-13 07:42:12,383 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2021-10-13 07:42:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:12,384 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-10-13 07:42:12,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 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 07:42:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-10-13 07:42:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 07:42:12,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:12,386 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:12,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:12,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:12,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:12,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:12,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:42:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -730132952, now seen corresponding path program 1 times [2021-10-13 07:42:12,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:12,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022873492] [2021-10-13 07:42:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:12,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:12,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:12,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:12,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:42:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:42:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:42:13,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:42:13,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:13,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022873492] [2021-10-13 07:42:13,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022873492] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:13,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314050258] [2021-10-13 07:42:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:13,812 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:13,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:42:13,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:42:13,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 07:42:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:42:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:42:14,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:42:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [314050258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233039941] [2021-10-13 07:42:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:14,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:14,547 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:14,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 07:42:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:42:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:14,964 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:42:14,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:42:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 07:42:15,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 07:42:17,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233039941] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:17,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:17,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 5, 5] total 28 [2021-10-13 07:42:17,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79818095] [2021-10-13 07:42:17,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 07:42:17,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 07:42:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-10-13 07:42:17,385 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 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 07:42:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:20,629 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-10-13 07:42:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 07:42:20,630 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 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 36 [2021-10-13 07:42:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:20,631 INFO L225 Difference]: With dead ends: 76 [2021-10-13 07:42:20,631 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 07:42:20,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 3594.5ms TimeCoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 07:42:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 07:42:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-13 07:42:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-10-13 07:42:20,640 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 36 [2021-10-13 07:42:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:20,641 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-10-13 07:42:20,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 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 07:42:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-10-13 07:42:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 07:42:20,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:20,643 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1] [2021-10-13 07:42:20,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:20,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:21,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:21,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:21,247 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:42:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:21,248 INFO L82 PathProgramCache]: Analyzing trace with hash 145810758, now seen corresponding path program 3 times [2021-10-13 07:42:21,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:21,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349086434] [2021-10-13 07:42:21,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:42:21,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:21,249 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:21,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:42:21,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:42:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:42:21,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:42:22,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 07:42:22,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:22,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349086434] [2021-10-13 07:42:22,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349086434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:22,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873422255] [2021-10-13 07:42:22,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:42:22,657 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:22,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:42:22,659 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:42:22,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 07:42:23,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:42:23,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 07:42:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:23,673 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:42:23,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:42:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 105 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:42:24,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:46,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1873422255] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:46,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942685059] [2021-10-13 07:42:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:42:46,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:46,422 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:46,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 07:42:49,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:42:49,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:42:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:49,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:42:49,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:42:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 76 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:42:50,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942685059] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:10,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:43:10,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 23, 15, 18] total 76 [2021-10-13 07:43:10,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203138182] [2021-10-13 07:43:10,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-10-13 07:43:10,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:10,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-10-13 07:43:10,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=4881, Unknown=0, NotChecked=0, Total=5700 [2021-10-13 07:43:10,199 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 76 states, 76 states have (on average 2.6184210526315788) internal successors, (199), 76 states have internal predecessors, (199), 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 07:43:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:11,081 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-10-13 07:43:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:43:11,083 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.6184210526315788) internal successors, (199), 76 states have internal predecessors, (199), 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 46 [2021-10-13 07:43:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:11,084 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:43:11,084 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 07:43:11,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 33846.0ms TimeCoverageRelationStatistics Valid=819, Invalid=4881, Unknown=0, NotChecked=0, Total=5700 [2021-10-13 07:43:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 07:43:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-13 07:43:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 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 07:43:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-10-13 07:43:11,093 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 46 [2021-10-13 07:43:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:11,093 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-10-13 07:43:11,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.6184210526315788) internal successors, (199), 76 states have internal predecessors, (199), 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 07:43:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-10-13 07:43:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 07:43:11,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:11,097 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:11,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:11,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:11,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:11,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:11,701 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:43:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 559564220, now seen corresponding path program 2 times [2021-10-13 07:43:11,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:11,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207656245] [2021-10-13 07:43:11,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:11,702 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:11,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:11,703 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:11,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 07:43:12,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:43:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:43:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:12,413 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:43:12,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:43:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:43:13,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:43:16,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:16,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207656245] [2021-10-13 07:43:16,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207656245] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:16,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2132483307] [2021-10-13 07:43:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:16,921 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:16,922 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:16,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 07:43:17,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:43:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:43:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:17,951 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:43:17,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:43:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:43:18,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:43:21,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2132483307] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:21,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628533806] [2021-10-13 07:43:21,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:21,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:21,974 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:21,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 07:43:22,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:43:22,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:43:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:22,932 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:43:22,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:43:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:43:23,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:43:28,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628533806] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:28,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:43:28,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 9, 10] total 32 [2021-10-13 07:43:28,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826752844] [2021-10-13 07:43:28,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 07:43:28,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 07:43:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 07:43:28,876 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 34 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:46,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:46,090 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-10-13 07:43:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 07:43:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-13 07:43:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:46,092 INFO L225 Difference]: With dead ends: 94 [2021-10-13 07:43:46,092 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 07:43:46,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 22147.3ms TimeCoverageRelationStatistics Valid=621, Invalid=1929, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 07:43:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 07:43:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-13 07:43:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 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 07:43:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-10-13 07:43:46,102 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 61 [2021-10-13 07:43:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:46,103 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-10-13 07:43:46,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-10-13 07:43:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 07:43:46,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:46,105 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:46,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:46,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:46,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-13 07:43:46,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:43:46,711 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-10-13 07:43:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash -533901868, now seen corresponding path program 3 times [2021-10-13 07:43:46,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:46,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736284209] [2021-10-13 07:43:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:43:46,712 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:46,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:46,713 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:46,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 07:43:48,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:43:48,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:43:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 174 proven. 190 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-10-13 07:43:48,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 174 proven. 190 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-10-13 07:43:49,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:49,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736284209] [2021-10-13 07:43:49,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736284209] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:49,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [938870319] [2021-10-13 07:43:49,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:43:49,430 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:49,432 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-13 07:43:52,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:43:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 07:43:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:52,471 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:43:52,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:43:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 168 proven. 345 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:43:54,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 228 proven. 285 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:44:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [938870319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:38,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814705720] [2021-10-13 07:44:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:44:38,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:38,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:38,719 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:38,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 07:44:40,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:44:40,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 07:44:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:40,711 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:44:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:44:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 168 proven. 200 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-13 07:44:41,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:45:24,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814705720] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:24,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:45:24,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 25, 32, 14, 24] total 103 [2021-10-13 07:45:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501424454] [2021-10-13 07:45:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-10-13 07:45:24,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-10-13 07:45:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=9549, Unknown=0, NotChecked=0, Total=10506 [2021-10-13 07:45:24,534 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 103 states, 103 states have (on average 3.116504854368932) internal successors, (321), 103 states have internal predecessors, (321), 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 07:45:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:39,073 INFO L93 Difference]: Finished difference Result 76 states and 75 transitions. [2021-10-13 07:45:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 07:45:39,073 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.116504854368932) internal successors, (321), 103 states have internal predecessors, (321), 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 93 [2021-10-13 07:45:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:39,074 INFO L225 Difference]: With dead ends: 76 [2021-10-13 07:45:39,074 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:45:39,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 68116.0ms TimeCoverageRelationStatistics Valid=1629, Invalid=11481, Unknown=0, NotChecked=0, Total=13110 [2021-10-13 07:45:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:45:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:45:39,079 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 07:45:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:45:39,079 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2021-10-13 07:45:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:45:39,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.116504854368932) internal successors, (321), 103 states have internal predecessors, (321), 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 07:45:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:45:39,081 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:45:39,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:45:39,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:45:39,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:45:39,084 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:45:39,084 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:45:39,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 07:45:39,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-13 07:45:39,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-10-13 07:45:39,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:39,693 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:45:39,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:45:39 BoogieIcfgContainer [2021-10-13 07:45:39,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:45:39,701 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:45:39,701 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:45:39,701 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:45:39,702 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:41:42" (3/4) ... [2021-10-13 07:45:39,705 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:45:39,715 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-13 07:45:39,715 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:45:39,715 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 07:45:39,715 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:45:39,745 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:45:39,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:45:39,746 INFO L168 Benchmark]: Toolchain (without parser) took 238312.90 ms. Allocated memory was 56.6 MB in the beginning and 94.4 MB in the end (delta: 37.7 MB). Free memory was 34.9 MB in the beginning and 18.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:39,747 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 37.9 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:45:39,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.71 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 40.2 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:39,748 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.98 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 40.2 MB in the beginning and 60.7 MB in the end (delta: -20.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:39,748 INFO L168 Benchmark]: Boogie Preprocessor took 76.03 ms. Allocated memory is still 77.6 MB. Free memory was 60.7 MB in the beginning and 59.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:45:39,749 INFO L168 Benchmark]: RCFGBuilder took 589.08 ms. Allocated memory is still 77.6 MB. Free memory was 59.3 MB in the beginning and 49.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:39,756 INFO L168 Benchmark]: TraceAbstraction took 237198.78 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 48.6 MB in the beginning and 21.2 MB in the end (delta: 27.4 MB). Peak memory consumption was 45.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:39,756 INFO L168 Benchmark]: Witness Printer took 44.55 ms. Allocated memory is still 94.4 MB. Free memory was 21.2 MB in the beginning and 18.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:45:39,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 37.9 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.71 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 40.2 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.98 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 40.2 MB in the beginning and 60.7 MB in the end (delta: -20.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.03 ms. Allocated memory is still 77.6 MB. Free memory was 60.7 MB in the beginning and 59.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 589.08 ms. Allocated memory is still 77.6 MB. Free memory was 59.3 MB in the beginning and 49.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 237198.78 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 48.6 MB in the beginning and 21.2 MB in the end (delta: 27.4 MB). Peak memory consumption was 45.7 MB. Max. memory is 16.1 GB. * Witness Printer took 44.55 ms. Allocated memory is still 94.4 MB. Free memory was 21.2 MB in the beginning and 18.9 MB in the end (delta: 2.3 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: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 237088.1ms, OverallIterations: 11, TraceHistogramMax: 15, EmptinessCheckTime: 47.0ms, AutomataDifference: 45183.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 116 SDtfs, 2352 SDslu, 732 SDs, 0 SdLazy, 4558 SolverSat, 639 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18481.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1844 GetRequests, 1467 SyntacticMatches, 4 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6948 ImplicationChecksByTransitivity, 142147.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=10, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 94.8ms AutomataMinimizationTime, 11 MinimizatonAttempts, 155 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 309.0ms SsaConstructionTime, 7860.3ms SatisfiabilityAnalysisTime, 168461.1ms InterpolantComputationTime, 914 NumberOfCodeBlocks, 914 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 1772 ConstructedInterpolants, 0 QuantifiedInterpolants, 29633 SizeOfPredicates, 62 NumberOfNonLiveVariables, 2433 ConjunctsInSsa, 304 ConjunctsInUnsatCore, 56 InterpolantComputations, 10 PerfectInterpolantSequences, 3199/7246 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 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 07:45:39,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5dff42-c4e2-4a91-9e7a-bc51dbc2d4ce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...