./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cc51a90eddcdd1da62e020cc4e0c6e4b67a610d36952c31f8c5cbe15c29949c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:31,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:31,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:31,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:31,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:31,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:31,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:31,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:31,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:31,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:31,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:31,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:31,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:31,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:31,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:31,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:31,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:31,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:31,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:31,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:31,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:31,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:31,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:31,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:31,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:31,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:31,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:31,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:31,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:31,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:31,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:31,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:31,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:31,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:31,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:31,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:31,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:31,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:31,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:31,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:31,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:31,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:48:31,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:31,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:31,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:31,403 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:31,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:31,403 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:31,403 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:31,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:31,404 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:31,404 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:31,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:31,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:31,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:31,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:31,404 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:31,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:31,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:31,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:31,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:31,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:31,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:31,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:31,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:31,407 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:31,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:31,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:31,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:31,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:31,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:31,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:31,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:31,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:31,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:31,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:31,409 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:31,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:31,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:31,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:31,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:31,423 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_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cc51a90eddcdd1da62e020cc4e0c6e4b67a610d36952c31f8c5cbe15c29949c [2021-11-07 01:48:31,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:31,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:31,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:31,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:31,721 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:31,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product21.cil.c [2021-11-07 01:48:31,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/2cfa60b03/e203d38e46b7462c82a9d04d14787227/FLAG1aac8512c [2021-11-07 01:48:32,429 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:32,430 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/sv-benchmarks/c/product-lines/email_spec8_product21.cil.c [2021-11-07 01:48:32,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/2cfa60b03/e203d38e46b7462c82a9d04d14787227/FLAG1aac8512c [2021-11-07 01:48:32,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/2cfa60b03/e203d38e46b7462c82a9d04d14787227 [2021-11-07 01:48:32,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:32,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:32,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:32,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:32,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:32,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:32" (1/1) ... [2021-11-07 01:48:32,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b4fa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:32, skipping insertion in model container [2021-11-07 01:48:32,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:32" (1/1) ... [2021-11-07 01:48:32,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:32,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:33,213 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/sv-benchmarks/c/product-lines/email_spec8_product21.cil.c[15456,15469] [2021-11-07 01:48:33,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:33,383 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:48:33,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6bd9abd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:33, skipping insertion in model container [2021-11-07 01:48:33,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:33,385 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:33,387 INFO L168 Benchmark]: Toolchain (without parser) took 736.74 ms. Allocated memory is still 134.2 MB. Free memory was 89.3 MB in the beginning and 93.2 MB in the end (delta: -3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:33,388 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 109.1 MB in the end (delta: 66.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:33,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.36 ms. Allocated memory is still 134.2 MB. Free memory was 89.2 MB in the beginning and 93.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:33,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 109.1 MB in the end (delta: 66.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 731.36 ms. Allocated memory is still 134.2 MB. Free memory was 89.2 MB in the beginning and 93.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1067]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cc51a90eddcdd1da62e020cc4e0c6e4b67a610d36952c31f8c5cbe15c29949c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:35,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:35,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:35,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:35,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:35,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:35,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:35,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:35,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:35,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:35,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:35,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:35,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:35,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:35,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:35,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:35,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:35,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:35,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:35,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:35,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:35,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:35,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:35,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:35,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:35,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:35,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:35,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:35,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:35,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:35,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:35,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:35,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:35,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:35,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:35,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:35,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:35,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:35,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:35,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:35,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:35,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:48:35,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:35,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:35,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:35,895 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:35,895 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:35,896 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:35,896 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:35,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:35,897 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:35,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:35,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:35,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:35,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:35,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:35,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:35,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:35,901 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:35,901 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:48:35,902 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:48:35,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:35,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:35,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:35,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:35,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:35,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:48:35,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:35,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:35,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:35,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:35,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:35,905 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:48:35,906 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:35,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:35,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:35,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:35,907 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_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cc51a90eddcdd1da62e020cc4e0c6e4b67a610d36952c31f8c5cbe15c29949c [2021-11-07 01:48:36,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:36,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:36,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:36,294 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:36,295 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:36,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product21.cil.c [2021-11-07 01:48:36,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/4f245bed9/eff53fd9a90b4daca9887dfc43b204bb/FLAG2455b1aae [2021-11-07 01:48:36,987 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:36,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/sv-benchmarks/c/product-lines/email_spec8_product21.cil.c [2021-11-07 01:48:37,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/4f245bed9/eff53fd9a90b4daca9887dfc43b204bb/FLAG2455b1aae [2021-11-07 01:48:37,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/data/4f245bed9/eff53fd9a90b4daca9887dfc43b204bb [2021-11-07 01:48:37,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:37,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:37,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:37,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:37,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:37,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:37" (1/1) ... [2021-11-07 01:48:37,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ea9d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:37, skipping insertion in model container [2021-11-07 01:48:37,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:37" (1/1) ... [2021-11-07 01:48:37,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:37,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:37,840 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/sv-benchmarks/c/product-lines/email_spec8_product21.cil.c[15456,15469] [2021-11-07 01:48:38,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:38,119 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:48:38,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:38,154 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/sv-benchmarks/c/product-lines/email_spec8_product21.cil.c[15456,15469] [2021-11-07 01:48:38,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:38,221 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:48:38,255 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/sv-benchmarks/c/product-lines/email_spec8_product21.cil.c[15456,15469] [2021-11-07 01:48:38,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:38,339 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:48:38,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38 WrapperNode [2021-11-07 01:48:38,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:38,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:38,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:48:38,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:48:38,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:38,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:48:38,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:48:38,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:48:38,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:48:38,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:48:38,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:48:38,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:48:38,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (1/1) ... [2021-11-07 01:48:38,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:48:38,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:48:38,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:48:38,776 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:48:38,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:48:38,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:48:38,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:48:38,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:48:44,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:48:44,397 INFO L299 CfgBuilder]: Removed 649 assume(true) statements. [2021-11-07 01:48:44,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:48:44 BoogieIcfgContainer [2021-11-07 01:48:44,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:48:44,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:48:44,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:48:44,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:48:44,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:48:37" (1/3) ... [2021-11-07 01:48:44,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2001ad26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:48:44, skipping insertion in model container [2021-11-07 01:48:44,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:38" (2/3) ... [2021-11-07 01:48:44,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2001ad26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:48:44, skipping insertion in model container [2021-11-07 01:48:44,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:48:44" (3/3) ... [2021-11-07 01:48:44,413 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product21.cil.c [2021-11-07 01:48:44,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:48:44,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:48:44,476 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:48:44,482 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:48:44,482 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:48:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 962 states, 955 states have (on average 1.7340314136125654) internal successors, (1656), 961 states have internal predecessors, (1656), 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) [2021-11-07 01:48:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:48:44,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:44,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:44,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash -517743260, now seen corresponding path program 1 times [2021-11-07 01:48:44,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:44,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646371594] [2021-11-07 01:48:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:44,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:44,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:44,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:48:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:45,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:48:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:45,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:45,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:45,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646371594] [2021-11-07 01:48:45,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646371594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:45,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:45,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:48:45,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116136392] [2021-11-07 01:48:45,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:48:45,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:48:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:48:45,463 INFO L87 Difference]: Start difference. First operand has 962 states, 955 states have (on average 1.7340314136125654) internal successors, (1656), 961 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 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) [2021-11-07 01:48:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:45,592 INFO L93 Difference]: Finished difference Result 1639 states and 2789 transitions. [2021-11-07 01:48:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:48:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:48:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:45,617 INFO L225 Difference]: With dead ends: 1639 [2021-11-07 01:48:45,617 INFO L226 Difference]: Without dead ends: 834 [2021-11-07 01:48:45,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:48:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-07 01:48:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-11-07 01:48:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 828 states have (on average 1.7355072463768115) internal successors, (1437), 833 states have internal predecessors, (1437), 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) [2021-11-07 01:48:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1437 transitions. [2021-11-07 01:48:45,720 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1437 transitions. Word has length 44 [2021-11-07 01:48:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:45,721 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1437 transitions. [2021-11-07 01:48:45,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 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) [2021-11-07 01:48:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1437 transitions. [2021-11-07 01:48:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:48:45,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:45,728 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:45,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:48:45,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:45,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1746813796, now seen corresponding path program 1 times [2021-11-07 01:48:45,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:45,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744620351] [2021-11-07 01:48:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:45,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:45,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:45,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:45,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:48:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:46,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:46,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:46,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744620351] [2021-11-07 01:48:46,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744620351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:46,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:46,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:46,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697534960] [2021-11-07 01:48:46,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:46,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:46,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:46,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:46,642 INFO L87 Difference]: Start difference. First operand 834 states and 1437 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-07 01:48:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:46,821 INFO L93 Difference]: Finished difference Result 2472 states and 4263 transitions. [2021-11-07 01:48:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 45 [2021-11-07 01:48:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:46,833 INFO L225 Difference]: With dead ends: 2472 [2021-11-07 01:48:46,833 INFO L226 Difference]: Without dead ends: 1653 [2021-11-07 01:48:46,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-11-07 01:48:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 833. [2021-11-07 01:48:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 827 states have (on average 1.7315598548972189) internal successors, (1432), 832 states have internal predecessors, (1432), 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) [2021-11-07 01:48:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1432 transitions. [2021-11-07 01:48:46,881 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1432 transitions. Word has length 45 [2021-11-07 01:48:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:46,882 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1432 transitions. [2021-11-07 01:48:46,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-07 01:48:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1432 transitions. [2021-11-07 01:48:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:48:46,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:46,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:46,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:47,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash -647888126, now seen corresponding path program 1 times [2021-11-07 01:48:47,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:47,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158213059] [2021-11-07 01:48:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:47,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:47,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:47,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:48:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:47,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:47,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:47,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:47,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158213059] [2021-11-07 01:48:47,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158213059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:47,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:47,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:47,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773173893] [2021-11-07 01:48:47,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:47,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:47,867 INFO L87 Difference]: Start difference. First operand 833 states and 1432 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 01:48:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:48,225 INFO L93 Difference]: Finished difference Result 3249 states and 5590 transitions. [2021-11-07 01:48:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 47 [2021-11-07 01:48:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:48,242 INFO L225 Difference]: With dead ends: 3249 [2021-11-07 01:48:48,242 INFO L226 Difference]: Without dead ends: 2434 [2021-11-07 01:48:48,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:48:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-11-07 01:48:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 832. [2021-11-07 01:48:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.728813559322034) internal successors, (1428), 831 states have internal predecessors, (1428), 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) [2021-11-07 01:48:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1428 transitions. [2021-11-07 01:48:48,312 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1428 transitions. Word has length 47 [2021-11-07 01:48:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:48,313 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1428 transitions. [2021-11-07 01:48:48,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 01:48:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1428 transitions. [2021-11-07 01:48:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:48:48,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:48,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:48,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:48,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:48,542 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1559988203, now seen corresponding path program 1 times [2021-11-07 01:48:48,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:48,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231126006] [2021-11-07 01:48:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:48,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:48,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:48,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:48:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:49,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:49,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231126006] [2021-11-07 01:48:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231126006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:49,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:49,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:49,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688567653] [2021-11-07 01:48:49,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:49,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:49,321 INFO L87 Difference]: Start difference. First operand 832 states and 1428 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 01:48:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:49,419 INFO L93 Difference]: Finished difference Result 1661 states and 2853 transitions. [2021-11-07 01:48:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 48 [2021-11-07 01:48:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:49,426 INFO L225 Difference]: With dead ends: 1661 [2021-11-07 01:48:49,426 INFO L226 Difference]: Without dead ends: 837 [2021-11-07 01:48:49,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-11-07 01:48:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 832. [2021-11-07 01:48:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.725181598062954) internal successors, (1425), 831 states have internal predecessors, (1425), 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) [2021-11-07 01:48:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1425 transitions. [2021-11-07 01:48:49,484 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1425 transitions. Word has length 48 [2021-11-07 01:48:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:49,484 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1425 transitions. [2021-11-07 01:48:49,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 01:48:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1425 transitions. [2021-11-07 01:48:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:48:49,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:49,486 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:49,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:49,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:49,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash -532074006, now seen corresponding path program 1 times [2021-11-07 01:48:49,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:49,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141124715] [2021-11-07 01:48:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:49,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:49,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:49,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:49,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:48:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:50,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:50,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:50,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:50,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141124715] [2021-11-07 01:48:50,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141124715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:50,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:50,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:50,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839286780] [2021-11-07 01:48:50,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:50,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:50,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:50,454 INFO L87 Difference]: Start difference. First operand 832 states and 1425 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:50,805 INFO L93 Difference]: Finished difference Result 3236 states and 5566 transitions. [2021-11-07 01:48:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:50,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:48:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:50,822 INFO L225 Difference]: With dead ends: 3236 [2021-11-07 01:48:50,823 INFO L226 Difference]: Without dead ends: 2430 [2021-11-07 01:48:50,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:48:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-11-07 01:48:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 832. [2021-11-07 01:48:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.721549636803874) internal successors, (1422), 831 states have internal predecessors, (1422), 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) [2021-11-07 01:48:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1422 transitions. [2021-11-07 01:48:50,933 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1422 transitions. Word has length 49 [2021-11-07 01:48:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:50,934 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1422 transitions. [2021-11-07 01:48:50,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1422 transitions. [2021-11-07 01:48:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:48:50,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:50,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:50,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:51,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:51,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2040658021, now seen corresponding path program 1 times [2021-11-07 01:48:51,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:51,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2401736] [2021-11-07 01:48:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:51,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:51,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:51,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:48:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:51,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:51,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:51,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:51,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2401736] [2021-11-07 01:48:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2401736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:51,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:51,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:51,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068126535] [2021-11-07 01:48:51,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:51,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:51,956 INFO L87 Difference]: Start difference. First operand 832 states and 1422 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:52,087 INFO L93 Difference]: Finished difference Result 2187 states and 3731 transitions. [2021-11-07 01:48:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:48:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:52,099 INFO L225 Difference]: With dead ends: 2187 [2021-11-07 01:48:52,099 INFO L226 Difference]: Without dead ends: 1638 [2021-11-07 01:48:52,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-11-07 01:48:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1089. [2021-11-07 01:48:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1083 states have (on average 1.7497691597414589) internal successors, (1895), 1088 states have internal predecessors, (1895), 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) [2021-11-07 01:48:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1895 transitions. [2021-11-07 01:48:52,199 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1895 transitions. Word has length 51 [2021-11-07 01:48:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1895 transitions. [2021-11-07 01:48:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1895 transitions. [2021-11-07 01:48:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:48:52,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:52,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:52,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:52,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:52,417 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash 209176310, now seen corresponding path program 1 times [2021-11-07 01:48:52,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:52,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152086611] [2021-11-07 01:48:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:52,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:52,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:52,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:52,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:48:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:53,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:53,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:53,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152086611] [2021-11-07 01:48:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152086611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:53,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:53,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:53,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126486081] [2021-11-07 01:48:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:53,164 INFO L87 Difference]: Start difference. First operand 1089 states and 1895 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 01:48:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:53,349 INFO L93 Difference]: Finished difference Result 2848 states and 4951 transitions. [2021-11-07 01:48:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 01:48:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:53,362 INFO L225 Difference]: With dead ends: 2848 [2021-11-07 01:48:53,362 INFO L226 Difference]: Without dead ends: 1843 [2021-11-07 01:48:53,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-11-07 01:48:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1294. [2021-11-07 01:48:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1288 states have (on average 1.7631987577639752) internal successors, (2271), 1293 states have internal predecessors, (2271), 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) [2021-11-07 01:48:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2271 transitions. [2021-11-07 01:48:53,481 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2271 transitions. Word has length 63 [2021-11-07 01:48:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:53,481 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2271 transitions. [2021-11-07 01:48:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 01:48:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2271 transitions. [2021-11-07 01:48:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:48:53,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:53,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:53,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:53,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:53,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 83616469, now seen corresponding path program 1 times [2021-11-07 01:48:53,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:53,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418901289] [2021-11-07 01:48:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:53,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:53,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:53,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:53,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:48:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:54,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:54,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:54,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418901289] [2021-11-07 01:48:54,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418901289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:54,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:54,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:54,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88625511] [2021-11-07 01:48:54,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:54,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:54,535 INFO L87 Difference]: Start difference. First operand 1294 states and 2271 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 01:48:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:54,742 INFO L93 Difference]: Finished difference Result 3507 states and 6165 transitions. [2021-11-07 01:48:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 01:48:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:54,758 INFO L225 Difference]: With dead ends: 3507 [2021-11-07 01:48:54,758 INFO L226 Difference]: Without dead ends: 2301 [2021-11-07 01:48:54,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-07 01:48:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1752. [2021-11-07 01:48:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1746 states have (on average 1.7829324169530356) internal successors, (3113), 1751 states have internal predecessors, (3113), 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) [2021-11-07 01:48:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3113 transitions. [2021-11-07 01:48:54,911 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3113 transitions. Word has length 64 [2021-11-07 01:48:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:54,912 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 3113 transitions. [2021-11-07 01:48:54,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 01:48:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3113 transitions. [2021-11-07 01:48:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:48:54,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:54,915 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:54,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:55,129 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1201214011, now seen corresponding path program 1 times [2021-11-07 01:48:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:55,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187209474] [2021-11-07 01:48:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:55,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:55,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:55,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:48:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:55,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:56,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:56,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187209474] [2021-11-07 01:48:56,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187209474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:56,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:56,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:56,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754091996] [2021-11-07 01:48:56,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:56,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:56,050 INFO L87 Difference]: Start difference. First operand 1752 states and 3113 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-07 01:48:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:56,223 INFO L93 Difference]: Finished difference Result 3764 states and 6635 transitions. [2021-11-07 01:48:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 65 [2021-11-07 01:48:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:56,240 INFO L225 Difference]: With dead ends: 3764 [2021-11-07 01:48:56,240 INFO L226 Difference]: Without dead ends: 2301 [2021-11-07 01:48:56,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-07 01:48:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1752. [2021-11-07 01:48:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1746 states have (on average 1.7817869415807561) internal successors, (3111), 1751 states have internal predecessors, (3111), 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) [2021-11-07 01:48:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3111 transitions. [2021-11-07 01:48:56,433 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3111 transitions. Word has length 65 [2021-11-07 01:48:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:56,434 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 3111 transitions. [2021-11-07 01:48:56,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-07 01:48:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3111 transitions. [2021-11-07 01:48:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:48:56,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:56,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:56,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:56,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:56,653 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 549483300, now seen corresponding path program 1 times [2021-11-07 01:48:56,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:56,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562766106] [2021-11-07 01:48:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:56,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:56,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:56,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:48:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:57,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:57,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:57,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562766106] [2021-11-07 01:48:57,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562766106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:57,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:57,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:57,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054669713] [2021-11-07 01:48:57,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:57,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:57,574 INFO L87 Difference]: Start difference. First operand 1752 states and 3111 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-07 01:48:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:57,813 INFO L93 Difference]: Finished difference Result 4853 states and 8640 transitions. [2021-11-07 01:48:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-07 01:48:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:57,835 INFO L225 Difference]: With dead ends: 4853 [2021-11-07 01:48:57,835 INFO L226 Difference]: Without dead ends: 3197 [2021-11-07 01:48:57,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-11-07 01:48:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2648. [2021-11-07 01:48:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2642 states have (on average 1.8009084027252082) internal successors, (4758), 2647 states have internal predecessors, (4758), 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) [2021-11-07 01:48:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4758 transitions. [2021-11-07 01:48:58,048 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4758 transitions. Word has length 65 [2021-11-07 01:48:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:58,048 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 4758 transitions. [2021-11-07 01:48:58,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-07 01:48:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4758 transitions. [2021-11-07 01:48:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:48:58,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:58,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:58,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:58,271 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash 940941719, now seen corresponding path program 1 times [2021-11-07 01:48:58,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:58,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320986469] [2021-11-07 01:48:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:58,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:58,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:58,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:48:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:58,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:58,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:59,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:59,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320986469] [2021-11-07 01:48:59,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320986469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:59,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:59,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:59,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688795106] [2021-11-07 01:48:59,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:59,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:59,098 INFO L87 Difference]: Start difference. First operand 2648 states and 4758 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 01:48:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:59,402 INFO L93 Difference]: Finished difference Result 7277 states and 13100 transitions. [2021-11-07 01:48:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:48:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:59,448 INFO L225 Difference]: With dead ends: 7277 [2021-11-07 01:48:59,449 INFO L226 Difference]: Without dead ends: 4759 [2021-11-07 01:48:59,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-11-07 01:48:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4210. [2021-11-07 01:48:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4204 states have (on average 1.8142245480494767) internal successors, (7627), 4209 states have internal predecessors, (7627), 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) [2021-11-07 01:48:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 7627 transitions. [2021-11-07 01:48:59,747 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 7627 transitions. Word has length 66 [2021-11-07 01:48:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:59,749 INFO L470 AbstractCegarLoop]: Abstraction has 4210 states and 7627 transitions. [2021-11-07 01:48:59,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 01:48:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 7627 transitions. [2021-11-07 01:48:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:48:59,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:59,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:59,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:59,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:59,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash 379167669, now seen corresponding path program 1 times [2021-11-07 01:48:59,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:59,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709229983] [2021-11-07 01:48:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:59,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:59,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:59,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:59,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:49:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:00,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:00,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:00,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709229983] [2021-11-07 01:49:00,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709229983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:00,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:00,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:00,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814947888] [2021-11-07 01:49:00,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:00,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:00,823 INFO L87 Difference]: Start difference. First operand 4210 states and 7627 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 01:49:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:01,235 INFO L93 Difference]: Finished difference Result 11679 states and 21190 transitions. [2021-11-07 01:49:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-07 01:49:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:01,257 INFO L225 Difference]: With dead ends: 11679 [2021-11-07 01:49:01,257 INFO L226 Difference]: Without dead ends: 7633 [2021-11-07 01:49:01,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-11-07 01:49:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 7084. [2021-11-07 01:49:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7078 states have (on average 1.8225487425826505) internal successors, (12900), 7083 states have internal predecessors, (12900), 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) [2021-11-07 01:49:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 12900 transitions. [2021-11-07 01:49:01,763 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 12900 transitions. Word has length 67 [2021-11-07 01:49:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:01,764 INFO L470 AbstractCegarLoop]: Abstraction has 7084 states and 12900 transitions. [2021-11-07 01:49:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 01:49:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 12900 transitions. [2021-11-07 01:49:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:49:01,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:01,771 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:01,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:49:01,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:01,985 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash 928910105, now seen corresponding path program 1 times [2021-11-07 01:49:01,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:01,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321263872] [2021-11-07 01:49:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:01,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:01,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:01,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:49:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:02,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:02,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:49:03,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:03,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321263872] [2021-11-07 01:49:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321263872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:03,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:03,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:03,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959304896] [2021-11-07 01:49:03,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:03,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:03,034 INFO L87 Difference]: Start difference. First operand 7084 states and 12900 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2021-11-07 01:49:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:06,313 INFO L93 Difference]: Finished difference Result 26847 states and 48935 transitions. [2021-11-07 01:49:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:49:06,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 68 [2021-11-07 01:49:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:06,371 INFO L225 Difference]: With dead ends: 26847 [2021-11-07 01:49:06,371 INFO L226 Difference]: Without dead ends: 20050 [2021-11-07 01:49:06,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:49:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20050 states. [2021-11-07 01:49:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20050 to 7034. [2021-11-07 01:49:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7028 states have (on average 1.807057484348321) internal successors, (12700), 7033 states have internal predecessors, (12700), 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) [2021-11-07 01:49:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 12700 transitions. [2021-11-07 01:49:07,095 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 12700 transitions. Word has length 68 [2021-11-07 01:49:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:07,096 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 12700 transitions. [2021-11-07 01:49:07,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2021-11-07 01:49:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 12700 transitions. [2021-11-07 01:49:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:49:07,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:07,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:07,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1760002120, now seen corresponding path program 1 times [2021-11-07 01:49:07,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:07,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562616070] [2021-11-07 01:49:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:07,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:07,319 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:07,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:49:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:08,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:08,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:08,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562616070] [2021-11-07 01:49:08,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562616070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:08,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:08,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:08,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668720535] [2021-11-07 01:49:08,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:08,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:08,292 INFO L87 Difference]: Start difference. First operand 7034 states and 12700 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2021-11-07 01:49:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:08,905 INFO L93 Difference]: Finished difference Result 20480 states and 37032 transitions. [2021-11-07 01:49:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) Word has length 68 [2021-11-07 01:49:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:08,938 INFO L225 Difference]: With dead ends: 20480 [2021-11-07 01:49:08,938 INFO L226 Difference]: Without dead ends: 13617 [2021-11-07 01:49:08,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13617 states. [2021-11-07 01:49:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13617 to 13068. [2021-11-07 01:49:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13068 states, 13062 states have (on average 1.811437758383096) internal successors, (23661), 13067 states have internal predecessors, (23661), 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) [2021-11-07 01:49:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13068 states to 13068 states and 23661 transitions. [2021-11-07 01:49:09,700 INFO L78 Accepts]: Start accepts. Automaton has 13068 states and 23661 transitions. Word has length 68 [2021-11-07 01:49:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:09,701 INFO L470 AbstractCegarLoop]: Abstraction has 13068 states and 23661 transitions. [2021-11-07 01:49:09,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2021-11-07 01:49:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 13068 states and 23661 transitions. [2021-11-07 01:49:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:49:09,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:09,709 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:09,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:49:09,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:09,925 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1115801708, now seen corresponding path program 1 times [2021-11-07 01:49:09,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:09,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330711050] [2021-11-07 01:49:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:09,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:09,927 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:09,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:49:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:10,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:11,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:11,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330711050] [2021-11-07 01:49:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330711050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:11,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453111398] [2021-11-07 01:49:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:11,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:11,016 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:11,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:49:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:11,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:11,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:12,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:12,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453111398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:12,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:12,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:49:12,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197855656] [2021-11-07 01:49:12,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:12,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:12,254 INFO L87 Difference]: Start difference. First operand 13068 states and 23661 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2021-11-07 01:49:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:13,042 INFO L93 Difference]: Finished difference Result 13530 states and 24427 transitions. [2021-11-07 01:49:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 69 [2021-11-07 01:49:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:13,074 INFO L225 Difference]: With dead ends: 13530 [2021-11-07 01:49:13,074 INFO L226 Difference]: Without dead ends: 13070 [2021-11-07 01:49:13,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13070 states. [2021-11-07 01:49:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13070 to 13056. [2021-11-07 01:49:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13052 states have (on average 1.8114465216058842) internal successors, (23643), 13055 states have internal predecessors, (23643), 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) [2021-11-07 01:49:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 23643 transitions. [2021-11-07 01:49:13,813 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 23643 transitions. Word has length 69 [2021-11-07 01:49:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:13,814 INFO L470 AbstractCegarLoop]: Abstraction has 13056 states and 23643 transitions. [2021-11-07 01:49:13,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2021-11-07 01:49:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 23643 transitions. [2021-11-07 01:49:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:49:13,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:13,843 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:13,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:14,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:14,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:14,248 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:14,249 INFO L85 PathProgramCache]: Analyzing trace with hash 799884798, now seen corresponding path program 1 times [2021-11-07 01:49:14,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:14,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530477151] [2021-11-07 01:49:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:14,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:14,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:14,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:49:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:15,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:15,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:15,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530477151] [2021-11-07 01:49:15,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530477151] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:15,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194525405] [2021-11-07 01:49:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:15,499 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:15,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:15,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:15,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:49:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:49:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:17,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:17,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [194525405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:17,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:17,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:49:17,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593183011] [2021-11-07 01:49:17,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:49:17,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:49:17,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:49:17,577 INFO L87 Difference]: Start difference. First operand 13056 states and 23643 transitions. Second operand has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 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) [2021-11-07 01:49:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:39,423 INFO L93 Difference]: Finished difference Result 32516 states and 57819 transitions. [2021-11-07 01:49:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:49:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 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 103 [2021-11-07 01:49:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:39,482 INFO L225 Difference]: With dead ends: 32516 [2021-11-07 01:49:39,482 INFO L226 Difference]: Without dead ends: 32036 [2021-11-07 01:49:39,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:49:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32036 states. [2021-11-07 01:49:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32036 to 26266. [2021-11-07 01:49:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26266 states, 26262 states have (on average 1.8105247125123753) internal successors, (47548), 26265 states have internal predecessors, (47548), 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) [2021-11-07 01:49:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26266 states to 26266 states and 47548 transitions. [2021-11-07 01:49:41,028 INFO L78 Accepts]: Start accepts. Automaton has 26266 states and 47548 transitions. Word has length 103 [2021-11-07 01:49:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 26266 states and 47548 transitions. [2021-11-07 01:49:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 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) [2021-11-07 01:49:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26266 states and 47548 transitions. [2021-11-07 01:49:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:49:41,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:41,077 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:41,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:41,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:41,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:41,478 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1883446035, now seen corresponding path program 1 times [2021-11-07 01:49:41,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:41,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969960497] [2021-11-07 01:49:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:41,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:41,480 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:41,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:49:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:42,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:42,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:42,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969960497] [2021-11-07 01:49:42,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969960497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:42,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [308893845] [2021-11-07 01:49:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:42,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:42,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:42,787 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:42,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:49:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:44,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:44,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [308893845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:44,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:44,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:49:44,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77646893] [2021-11-07 01:49:44,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:44,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:49:44,234 INFO L87 Difference]: Start difference. First operand 26266 states and 47548 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2021-11-07 01:49:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:45,254 INFO L93 Difference]: Finished difference Result 28173 states and 50732 transitions. [2021-11-07 01:49:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 104 [2021-11-07 01:49:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:45,302 INFO L225 Difference]: With dead ends: 28173 [2021-11-07 01:49:45,302 INFO L226 Difference]: Without dead ends: 26909 [2021-11-07 01:49:45,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:49:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26909 states. [2021-11-07 01:49:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26909 to 26148. [2021-11-07 01:49:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26144 states have (on average 1.8109700122399022) internal successors, (47346), 26147 states have internal predecessors, (47346), 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) [2021-11-07 01:49:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 47346 transitions. [2021-11-07 01:49:47,120 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 47346 transitions. Word has length 104 [2021-11-07 01:49:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:47,120 INFO L470 AbstractCegarLoop]: Abstraction has 26148 states and 47346 transitions. [2021-11-07 01:49:47,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2021-11-07 01:49:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 47346 transitions. [2021-11-07 01:49:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:49:47,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:47,151 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:47,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:47,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:47,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:47,574 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2053832042, now seen corresponding path program 1 times [2021-11-07 01:49:47,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:47,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151846363] [2021-11-07 01:49:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:47,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:47,576 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:47,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:49:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:48,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:48,961 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:48,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151846363] [2021-11-07 01:49:48,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151846363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:48,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205874837] [2021-11-07 01:49:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:48,961 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:48,962 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:48,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:49:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:49:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:50,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:51,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205874837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:51,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:51,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:49:51,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044929740] [2021-11-07 01:49:51,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:49:51,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:49:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:49:51,253 INFO L87 Difference]: Start difference. First operand 26148 states and 47346 transitions. Second operand has 16 states, 16 states have (on average 9.4375) internal successors, (151), 15 states have internal predecessors, (151), 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) [2021-11-07 01:50:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:10,810 INFO L93 Difference]: Finished difference Result 63781 states and 113652 transitions. [2021-11-07 01:50:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 01:50:10,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 15 states have internal predecessors, (151), 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 105 [2021-11-07 01:50:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:10,909 INFO L225 Difference]: With dead ends: 63781 [2021-11-07 01:50:10,909 INFO L226 Difference]: Without dead ends: 62685 [2021-11-07 01:50:10,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1053, Invalid=3369, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 01:50:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62685 states. [2021-11-07 01:50:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62685 to 52260. [2021-11-07 01:50:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52256 states have (on average 1.8108351194121248) internal successors, (94627), 52259 states have internal predecessors, (94627), 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) [2021-11-07 01:50:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 94627 transitions. [2021-11-07 01:50:13,533 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 94627 transitions. Word has length 105 [2021-11-07 01:50:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:13,533 INFO L470 AbstractCegarLoop]: Abstraction has 52260 states and 94627 transitions. [2021-11-07 01:50:13,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 15 states have internal predecessors, (151), 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) [2021-11-07 01:50:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 94627 transitions. [2021-11-07 01:50:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:50:13,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:13,588 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:13,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:13,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 01:50:14,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:14,007 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:50:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:14,007 INFO L85 PathProgramCache]: Analyzing trace with hash -114669996, now seen corresponding path program 1 times [2021-11-07 01:50:14,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:14,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753897981] [2021-11-07 01:50:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:14,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:14,009 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:14,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:50:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:15,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:15,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:15,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753897981] [2021-11-07 01:50:15,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753897981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:15,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [995478017] [2021-11-07 01:50:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:15,568 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:15,569 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:15,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:50:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:16,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:17,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [995478017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:17,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:17,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:50:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457493717] [2021-11-07 01:50:17,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:50:17,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:50:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:50:17,658 INFO L87 Difference]: Start difference. First operand 52260 states and 94627 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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) [2021-11-07 01:50:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:22,261 INFO L93 Difference]: Finished difference Result 68815 states and 122120 transitions. [2021-11-07 01:50:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:50:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 105 [2021-11-07 01:50:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:22,365 INFO L225 Difference]: With dead ends: 68815 [2021-11-07 01:50:22,365 INFO L226 Difference]: Without dead ends: 65659 [2021-11-07 01:50:22,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:50:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65659 states. [2021-11-07 01:50:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65659 to 57811. [2021-11-07 01:50:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57811 states, 57807 states have (on average 1.796737419343678) internal successors, (103864), 57810 states have internal predecessors, (103864), 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) [2021-11-07 01:50:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57811 states to 57811 states and 103864 transitions. [2021-11-07 01:50:25,985 INFO L78 Accepts]: Start accepts. Automaton has 57811 states and 103864 transitions. Word has length 105 [2021-11-07 01:50:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:25,985 INFO L470 AbstractCegarLoop]: Abstraction has 57811 states and 103864 transitions. [2021-11-07 01:50:25,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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) [2021-11-07 01:50:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 57811 states and 103864 transitions. [2021-11-07 01:50:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:50:26,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:26,088 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:26,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:26,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:26,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:26,501 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:50:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -238416910, now seen corresponding path program 1 times [2021-11-07 01:50:26,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:26,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677200742] [2021-11-07 01:50:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:26,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:26,504 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:50:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:27,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:27,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:28,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:28,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677200742] [2021-11-07 01:50:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677200742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:28,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634548300] [2021-11-07 01:50:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:28,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:28,108 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:28,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:50:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:29,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:50:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:29,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:30,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1634548300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:30,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:30,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:50:30,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241281733] [2021-11-07 01:50:30,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:50:30,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:50:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:50:30,148 INFO L87 Difference]: Start difference. First operand 57811 states and 103864 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 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) [2021-11-07 01:50:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:34,391 INFO L93 Difference]: Finished difference Result 68332 states and 121254 transitions. [2021-11-07 01:50:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:50:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 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 106 [2021-11-07 01:50:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:34,486 INFO L225 Difference]: With dead ends: 68332 [2021-11-07 01:50:34,486 INFO L226 Difference]: Without dead ends: 60550 [2021-11-07 01:50:34,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:50:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60550 states. [2021-11-07 01:50:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60550 to 55608. [2021-11-07 01:50:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55608 states, 55604 states have (on average 1.8004280267606647) internal successors, (100111), 55607 states have internal predecessors, (100111), 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) [2021-11-07 01:50:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55608 states to 55608 states and 100111 transitions. [2021-11-07 01:50:37,546 INFO L78 Accepts]: Start accepts. Automaton has 55608 states and 100111 transitions. Word has length 106 [2021-11-07 01:50:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:37,546 INFO L470 AbstractCegarLoop]: Abstraction has 55608 states and 100111 transitions. [2021-11-07 01:50:37,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 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) [2021-11-07 01:50:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 55608 states and 100111 transitions. [2021-11-07 01:50:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:50:37,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:37,607 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:37,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:50:37,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:38,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:38,013 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:50:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1580091474, now seen corresponding path program 1 times [2021-11-07 01:50:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:38,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155288715] [2021-11-07 01:50:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:38,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:38,015 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:38,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:50:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:39,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:39,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:39,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155288715] [2021-11-07 01:50:39,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155288715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:39,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101748464] [2021-11-07 01:50:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:39,736 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:39,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:39,737 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:39,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:50:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:41,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:41,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101748464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:41,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:41,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:50:41,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163766361] [2021-11-07 01:50:41,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:41,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:41,770 INFO L87 Difference]: Start difference. First operand 55608 states and 100111 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-11-07 01:50:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:45,714 INFO L93 Difference]: Finished difference Result 69938 states and 123512 transitions. [2021-11-07 01:50:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:50:45,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2021-11-07 01:50:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:45,810 INFO L225 Difference]: With dead ends: 69938 [2021-11-07 01:50:45,810 INFO L226 Difference]: Without dead ends: 63996 [2021-11-07 01:50:45,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:50:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63996 states. [2021-11-07 01:50:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63996 to 55718. [2021-11-07 01:50:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55718 states, 55714 states have (on average 1.7988476863983918) internal successors, (100221), 55717 states have internal predecessors, (100221), 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) [2021-11-07 01:50:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55718 states to 55718 states and 100221 transitions. [2021-11-07 01:50:49,223 INFO L78 Accepts]: Start accepts. Automaton has 55718 states and 100221 transitions. Word has length 108 [2021-11-07 01:50:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:49,223 INFO L470 AbstractCegarLoop]: Abstraction has 55718 states and 100221 transitions. [2021-11-07 01:50:49,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-11-07 01:50:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 55718 states and 100221 transitions. [2021-11-07 01:50:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:50:49,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:49,272 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:49,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:49,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:49,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:49,672 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:50:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash 660668280, now seen corresponding path program 1 times [2021-11-07 01:50:49,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:49,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095698526] [2021-11-07 01:50:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:49,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:49,674 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:49,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:50:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:51,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:51,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:51,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095698526] [2021-11-07 01:50:51,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095698526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:51,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639081432] [2021-11-07 01:50:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:51,445 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:51,445 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:51,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643beceb-5a70-4d26-8795-f447eed01278/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:50:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:50:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:53,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:53,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639081432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:53,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:53,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:50:53,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108240049] [2021-11-07 01:50:53,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:50:53,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:50:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:50:53,734 INFO L87 Difference]: Start difference. First operand 55718 states and 100221 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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)