./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:09:43,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:09:43,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:09:43,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:09:43,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:09:43,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:09:43,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:09:43,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:09:43,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:09:43,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:09:43,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:09:43,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:09:43,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:09:43,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:09:43,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:09:43,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:09:43,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:09:43,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:09:43,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:09:43,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:09:43,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:09:43,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:09:43,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:09:43,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:09:43,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:09:43,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:09:43,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:09:43,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:09:43,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:09:43,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:09:43,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:09:43,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:09:43,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:09:43,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:09:43,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:09:43,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:09:43,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:09:43,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:09:43,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:09:43,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:09:43,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:09:43,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:09:43,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:09:43,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:09:43,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:09:43,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:09:43,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:09:43,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:09:43,391 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:09:43,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:09:43,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:09:43,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:09:43,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:09:43,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:09:43,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:09:43,393 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:09:43,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:09:43,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:09:43,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:09:43,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:09:43,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:09:43,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:09:43,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:09:43,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:09:43,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:09:43,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:43,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:09:43,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:09:43,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:09:43,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:09:43,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:09:43,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c [2021-11-23 13:09:43,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:09:43,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:09:43,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:09:43,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:09:43,681 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:09:43,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-23 13:09:43,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/b7e83632b/37f91ef70f8640b9b742f148572a23e4/FLAG8244cec23 [2021-11-23 13:09:44,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:09:44,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-23 13:09:44,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/b7e83632b/37f91ef70f8640b9b742f148572a23e4/FLAG8244cec23 [2021-11-23 13:09:44,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/b7e83632b/37f91ef70f8640b9b742f148572a23e4 [2021-11-23 13:09:44,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:09:44,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:09:44,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:44,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:09:44,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:09:44,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:44" (1/1) ... [2021-11-23 13:09:44,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e70101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:44, skipping insertion in model container [2021-11-23 13:09:44,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:44" (1/1) ... [2021-11-23 13:09:44,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:09:44,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:45,372 WARN L230 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-23 13:09:45,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:45,700 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) [2021-11-23 13:09:45,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13b4a03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:45, skipping insertion in model container [2021-11-23 13:09:45,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:45,702 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 13:09:45,704 INFO L158 Benchmark]: Toolchain (without parser) took 1059.44ms. Allocated memory is still 102.8MB. Free memory was 73.7MB in the beginning and 45.8MB in the end (delta: 27.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-23 13:09:45,705 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:09:45,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1053.60ms. Allocated memory is still 102.8MB. Free memory was 73.5MB in the beginning and 45.8MB in the end (delta: 27.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-23 13:09:45,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1053.60ms. Allocated memory is still 102.8MB. Free memory was 73.5MB in the beginning and 45.8MB in the end (delta: 27.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:09:48,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:09:48,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:09:48,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:09:48,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:09:48,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:09:48,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:09:48,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:09:48,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:09:48,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:09:48,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:09:48,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:09:48,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:09:48,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:09:48,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:09:48,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:09:48,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:09:48,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:09:48,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:09:48,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:09:48,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:09:48,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:09:48,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:09:48,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:09:48,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:09:48,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:09:48,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:09:48,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:09:48,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:09:48,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:09:48,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:09:48,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:09:48,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:09:48,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:09:48,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:09:48,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:09:48,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:09:48,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:09:48,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:09:48,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:09:48,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:09:48,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-23 13:09:48,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:09:48,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:09:48,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:09:48,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:09:48,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:09:48,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:09:48,585 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:09:48,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:09:48,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:09:48,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:09:48,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:09:48,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:09:48,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:09:48,588 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:09:48,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:09:48,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:09:48,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:09:48,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:09:48,590 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 13:09:48,590 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 13:09:48,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:09:48,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:09:48,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:09:48,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:09:48,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:09:48,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:48,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:09:48,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:09:48,592 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 13:09:48,592 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 13:09:48,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:09:48,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 13:09:48,593 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c [2021-11-23 13:09:49,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:09:49,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:09:49,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:09:49,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:09:49,089 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:09:49,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-23 13:09:49,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/bc206e87a/763d29104cd448d8aae45ad66a424353/FLAG4e32f57e3 [2021-11-23 13:09:50,070 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:09:50,071 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-23 13:09:50,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/bc206e87a/763d29104cd448d8aae45ad66a424353/FLAG4e32f57e3 [2021-11-23 13:09:50,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/data/bc206e87a/763d29104cd448d8aae45ad66a424353 [2021-11-23 13:09:50,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:09:50,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:09:50,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:50,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:09:50,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:09:50,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:50" (1/1) ... [2021-11-23 13:09:50,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fdf0574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:50, skipping insertion in model container [2021-11-23 13:09:50,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:50" (1/1) ... [2021-11-23 13:09:50,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:09:50,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:50,770 WARN L230 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-23 13:09:51,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:51,122 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 13:09:51,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:51,184 WARN L230 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-23 13:09:51,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:51,423 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:09:51,453 WARN L230 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_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-23 13:09:51,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:51,627 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:09:51,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51 WrapperNode [2021-11-23 13:09:51,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:51,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:51,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:09:51,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:09:51,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:51,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:51,851 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 2518 [2021-11-23 13:09:51,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:51,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:09:51,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:09:51,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:09:51,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:51,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:51,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:51,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:51,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:52,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:52,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:52,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:09:52,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:09:52,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:09:52,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:09:52,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (1/1) ... [2021-11-23 13:09:52,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:52,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:09:52,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:09:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 13:09:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 13:09:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:09:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:09:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 13:09:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:09:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 13:09:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 13:09:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:09:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 13:09:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 13:09:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:09:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:09:52,626 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:09:52,628 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:10:03,540 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:10:03,570 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:10:03,571 INFO L301 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-23 13:10:03,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:10:03 BoogieIcfgContainer [2021-11-23 13:10:03,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:10:03,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:10:03,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:10:03,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:10:03,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:09:50" (1/3) ... [2021-11-23 13:10:03,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb20d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:10:03, skipping insertion in model container [2021-11-23 13:10:03,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:51" (2/3) ... [2021-11-23 13:10:03,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb20d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:10:03, skipping insertion in model container [2021-11-23 13:10:03,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:10:03" (3/3) ... [2021-11-23 13:10:03,587 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-2.i [2021-11-23 13:10:03,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:10:03,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1110 error locations. [2021-11-23 13:10:03,667 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:10:03,676 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:10:03,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1110 error locations. [2021-11-23 13:10:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 2338 states, 1227 states have (on average 2.1833740831295843) internal successors, (2679), 2337 states have internal predecessors, (2679), 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) [2021-11-23 13:10:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 13:10:03,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:03,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 13:10:03,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:03,760 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-23 13:10:03,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:03,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502072920] [2021-11-23 13:10:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:03,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:03,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:03,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:03,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 13:10:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:10:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:04,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:04,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:04,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:04,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502072920] [2021-11-23 13:10:04,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502072920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:04,165 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:04,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 13:10:04,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475432180] [2021-11-23 13:10:04,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:04,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:10:04,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:10:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:10:04,225 INFO L87 Difference]: Start difference. First operand has 2338 states, 1227 states have (on average 2.1833740831295843) internal successors, (2679), 2337 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:09,401 INFO L93 Difference]: Finished difference Result 3022 states and 3214 transitions. [2021-11-23 13:10:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:10:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 13:10:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:09,445 INFO L225 Difference]: With dead ends: 3022 [2021-11-23 13:10:09,445 INFO L226 Difference]: Without dead ends: 3020 [2021-11-23 13:10:09,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:10:09,451 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 2276 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2276 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:09,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2276 Valid, 1917 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 13:10:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-11-23 13:10:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2486. [2021-11-23 13:10:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 1399 states have (on average 2.0207290922087204) internal successors, (2827), 2485 states have internal predecessors, (2827), 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) [2021-11-23 13:10:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 2827 transitions. [2021-11-23 13:10:09,618 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 2827 transitions. Word has length 3 [2021-11-23 13:10:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:09,619 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 2827 transitions. [2021-11-23 13:10:09,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 2827 transitions. [2021-11-23 13:10:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 13:10:09,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:09,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 13:10:09,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 13:10:09,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:09,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-23 13:10:09,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:09,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683399360] [2021-11-23 13:10:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:09,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:09,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 13:10:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:10,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:10,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:10,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:10,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683399360] [2021-11-23 13:10:10,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683399360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:10,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:10,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 13:10:10,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188622017] [2021-11-23 13:10:10,134 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:10,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:10,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:10,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:10,141 INFO L87 Difference]: Start difference. First operand 2486 states and 2827 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:21,089 INFO L93 Difference]: Finished difference Result 3870 states and 4334 transitions. [2021-11-23 13:10:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 13:10:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:21,112 INFO L225 Difference]: With dead ends: 3870 [2021-11-23 13:10:21,113 INFO L226 Difference]: Without dead ends: 3870 [2021-11-23 13:10:21,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:21,115 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 2878 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2878 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:21,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2878 Valid, 3673 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 13:10:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-11-23 13:10:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 2650. [2021-11-23 13:10:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 1575 states have (on average 2.012063492063492) internal successors, (3169), 2649 states have internal predecessors, (3169), 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) [2021-11-23 13:10:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3169 transitions. [2021-11-23 13:10:21,232 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3169 transitions. Word has length 3 [2021-11-23 13:10:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:21,233 INFO L470 AbstractCegarLoop]: Abstraction has 2650 states and 3169 transitions. [2021-11-23 13:10:21,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3169 transitions. [2021-11-23 13:10:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 13:10:21,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:21,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:21,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:21,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:21,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:21,452 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-23 13:10:21,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:21,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729644960] [2021-11-23 13:10:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:21,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:21,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:21,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 13:10:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:21,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:10:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:21,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:21,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:21,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729644960] [2021-11-23 13:10:21,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729644960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:21,698 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:21,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 13:10:21,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35797684] [2021-11-23 13:10:21,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:21,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:10:21,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:10:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:10:21,701 INFO L87 Difference]: Start difference. First operand 2650 states and 3169 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:25,332 INFO L93 Difference]: Finished difference Result 3472 states and 4003 transitions. [2021-11-23 13:10:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:10:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 13:10:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:25,351 INFO L225 Difference]: With dead ends: 3472 [2021-11-23 13:10:25,352 INFO L226 Difference]: Without dead ends: 3472 [2021-11-23 13:10:25,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:10:25,353 INFO L933 BasicCegarLoop]: 2330 mSDtfsCounter, 2121 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2121 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:25,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2121 Valid, 3146 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 13:10:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-11-23 13:10:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2559. [2021-11-23 13:10:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1575 states have (on average 1.9326984126984128) internal successors, (3044), 2558 states have internal predecessors, (3044), 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) [2021-11-23 13:10:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3044 transitions. [2021-11-23 13:10:25,416 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3044 transitions. Word has length 8 [2021-11-23 13:10:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:25,416 INFO L470 AbstractCegarLoop]: Abstraction has 2559 states and 3044 transitions. [2021-11-23 13:10:25,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3044 transitions. [2021-11-23 13:10:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 13:10:25,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:25,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:25,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:25,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:25,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-23 13:10:25,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:25,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075287597] [2021-11-23 13:10:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:25,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:25,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 13:10:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:25,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:25,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:25,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075287597] [2021-11-23 13:10:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075287597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:25,986 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:25,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 13:10:25,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488290164] [2021-11-23 13:10:25,986 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:25,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:25,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:25,987 INFO L87 Difference]: Start difference. First operand 2559 states and 3044 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:35,922 INFO L93 Difference]: Finished difference Result 3601 states and 4034 transitions. [2021-11-23 13:10:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 13:10:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:35,941 INFO L225 Difference]: With dead ends: 3601 [2021-11-23 13:10:35,942 INFO L226 Difference]: Without dead ends: 3601 [2021-11-23 13:10:35,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:35,943 INFO L933 BasicCegarLoop]: 2669 mSDtfsCounter, 1555 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 4995 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:35,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 4995 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 13:10:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2021-11-23 13:10:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 2551. [2021-11-23 13:10:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 1577 states have (on average 1.917564996829423) internal successors, (3024), 2550 states have internal predecessors, (3024), 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) [2021-11-23 13:10:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3024 transitions. [2021-11-23 13:10:36,008 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3024 transitions. Word has length 8 [2021-11-23 13:10:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:36,009 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 3024 transitions. [2021-11-23 13:10:36,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3024 transitions. [2021-11-23 13:10:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:10:36,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:36,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:36,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:36,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:36,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-23 13:10:36,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:36,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483950875] [2021-11-23 13:10:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:36,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:36,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:36,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 13:10:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:10:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:36,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:36,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:36,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483950875] [2021-11-23 13:10:36,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483950875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:36,494 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:36,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 13:10:36,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635512880] [2021-11-23 13:10:36,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:36,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:36,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:36,496 INFO L87 Difference]: Start difference. First operand 2551 states and 3024 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:36,573 INFO L93 Difference]: Finished difference Result 2509 states and 2981 transitions. [2021-11-23 13:10:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:10:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 13:10:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:36,589 INFO L225 Difference]: With dead ends: 2509 [2021-11-23 13:10:36,589 INFO L226 Difference]: Without dead ends: 2509 [2021-11-23 13:10:36,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:36,590 INFO L933 BasicCegarLoop]: 2295 mSDtfsCounter, 1110 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 4685 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:36,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 4685 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:10:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-11-23 13:10:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2509. [2021-11-23 13:10:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1559 states have (on average 1.912123155869147) internal successors, (2981), 2508 states have internal predecessors, (2981), 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) [2021-11-23 13:10:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 2981 transitions. [2021-11-23 13:10:36,643 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 2981 transitions. Word has length 11 [2021-11-23 13:10:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:36,644 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 2981 transitions. [2021-11-23 13:10:36,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 2981 transitions. [2021-11-23 13:10:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:10:36,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:36,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:36,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:36,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:36,859 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-23 13:10:36,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145609742] [2021-11-23 13:10:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:36,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:36,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:36,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 13:10:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:37,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:37,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:37,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145609742] [2021-11-23 13:10:37,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145609742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:37,099 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:37,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 13:10:37,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271198520] [2021-11-23 13:10:37,100 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:37,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:10:37,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:10:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:10:37,101 INFO L87 Difference]: Start difference. First operand 2509 states and 2981 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:37,215 INFO L93 Difference]: Finished difference Result 2488 states and 2953 transitions. [2021-11-23 13:10:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:10:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:37,228 INFO L225 Difference]: With dead ends: 2488 [2021-11-23 13:10:37,228 INFO L226 Difference]: Without dead ends: 2488 [2021-11-23 13:10:37,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:10:37,229 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 2152 mSDsluCounter, 3438 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 5688 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:37,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 5688 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-11-23 13:10:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2021-11-23 13:10:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1551 states have (on average 1.9032882011605416) internal successors, (2952), 2486 states have internal predecessors, (2952), 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) [2021-11-23 13:10:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2952 transitions. [2021-11-23 13:10:37,281 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2952 transitions. Word has length 13 [2021-11-23 13:10:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:37,282 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2952 transitions. [2021-11-23 13:10:37,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2952 transitions. [2021-11-23 13:10:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:10:37,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:37,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:37,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:37,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:37,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:37,507 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-23 13:10:37,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:37,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214371300] [2021-11-23 13:10:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:37,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:37,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:37,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:37,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 13:10:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:37,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:10:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:37,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:37,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:37,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214371300] [2021-11-23 13:10:37,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214371300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:37,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:37,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 13:10:37,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961845145] [2021-11-23 13:10:37,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:37,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:37,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:37,786 INFO L87 Difference]: Start difference. First operand 2487 states and 2952 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:37,855 INFO L93 Difference]: Finished difference Result 4013 states and 4586 transitions. [2021-11-23 13:10:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:10:37,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:10:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:37,876 INFO L225 Difference]: With dead ends: 4013 [2021-11-23 13:10:37,876 INFO L226 Difference]: Without dead ends: 4013 [2021-11-23 13:10:37,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:37,878 INFO L933 BasicCegarLoop]: 3893 mSDtfsCounter, 4450 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4450 SdHoareTripleChecker+Valid, 5570 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:37,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4450 Valid, 5570 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:10:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-11-23 13:10:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2409. [2021-11-23 13:10:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 1497 states have (on average 1.8857715430861723) internal successors, (2823), 2408 states have internal predecessors, (2823), 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) [2021-11-23 13:10:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 2823 transitions. [2021-11-23 13:10:37,940 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 2823 transitions. Word has length 20 [2021-11-23 13:10:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:37,940 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 2823 transitions. [2021-11-23 13:10:37,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 2823 transitions. [2021-11-23 13:10:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:10:37,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:37,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:37,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:38,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:38,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-23 13:10:38,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:38,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527738265] [2021-11-23 13:10:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:38,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:38,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:38,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 13:10:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:38,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:10:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:38,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:38,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:38,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527738265] [2021-11-23 13:10:38,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527738265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:38,437 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:38,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 13:10:38,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567079009] [2021-11-23 13:10:38,438 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:38,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:38,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:38,439 INFO L87 Difference]: Start difference. First operand 2409 states and 2823 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:38,502 INFO L93 Difference]: Finished difference Result 3936 states and 4509 transitions. [2021-11-23 13:10:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:10:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:10:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:38,521 INFO L225 Difference]: With dead ends: 3936 [2021-11-23 13:10:38,521 INFO L226 Difference]: Without dead ends: 3936 [2021-11-23 13:10:38,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:38,522 INFO L933 BasicCegarLoop]: 3814 mSDtfsCounter, 4364 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4364 SdHoareTripleChecker+Valid, 5455 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:38,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4364 Valid, 5455 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:10:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-11-23 13:10:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 2367. [2021-11-23 13:10:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1479 states have (on average 1.8796484110885734) internal successors, (2780), 2366 states have internal predecessors, (2780), 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) [2021-11-23 13:10:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2780 transitions. [2021-11-23 13:10:38,576 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2780 transitions. Word has length 20 [2021-11-23 13:10:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:38,577 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 2780 transitions. [2021-11-23 13:10:38,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2780 transitions. [2021-11-23 13:10:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:10:38,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:38,578 INFO L514 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] [2021-11-23 13:10:38,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:38,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:38,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-23 13:10:38,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:38,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555506310] [2021-11-23 13:10:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:38,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:38,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:38,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 13:10:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:39,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:39,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555506310] [2021-11-23 13:10:39,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555506310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:39,063 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:39,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 13:10:39,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586525561] [2021-11-23 13:10:39,063 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:39,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:10:39,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:10:39,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:10:39,065 INFO L87 Difference]: Start difference. First operand 2367 states and 2780 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-23 13:10:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:39,156 INFO L93 Difference]: Finished difference Result 3894 states and 4416 transitions. [2021-11-23 13:10:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:10:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:39,167 INFO L225 Difference]: With dead ends: 3894 [2021-11-23 13:10:39,168 INFO L226 Difference]: Without dead ends: 3894 [2021-11-23 13:10:39,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:10:39,169 INFO L933 BasicCegarLoop]: 3762 mSDtfsCounter, 2153 mSDsluCounter, 7023 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2153 SdHoareTripleChecker+Valid, 10785 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:39,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2153 Valid, 10785 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-11-23 13:10:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 2329. [2021-11-23 13:10:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1455 states have (on average 1.8508591065292097) internal successors, (2693), 2328 states have internal predecessors, (2693), 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) [2021-11-23 13:10:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2693 transitions. [2021-11-23 13:10:39,222 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2693 transitions. Word has length 22 [2021-11-23 13:10:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:39,222 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2693 transitions. [2021-11-23 13:10:39,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-23 13:10:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2693 transitions. [2021-11-23 13:10:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:10:39,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:39,224 INFO L514 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] [2021-11-23 13:10:39,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:39,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:39,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-23 13:10:39,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:39,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655469917] [2021-11-23 13:10:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:39,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:39,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:39,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 13:10:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:39,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655469917] [2021-11-23 13:10:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655469917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:39,702 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 13:10:39,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618519483] [2021-11-23 13:10:39,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:39,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:10:39,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:10:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:10:39,704 INFO L87 Difference]: Start difference. First operand 2329 states and 2693 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-23 13:10:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:39,833 INFO L93 Difference]: Finished difference Result 3855 states and 4365 transitions. [2021-11-23 13:10:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:10:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:39,842 INFO L225 Difference]: With dead ends: 3855 [2021-11-23 13:10:39,842 INFO L226 Difference]: Without dead ends: 3855 [2021-11-23 13:10:39,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:10:39,843 INFO L933 BasicCegarLoop]: 3699 mSDtfsCounter, 2118 mSDsluCounter, 6904 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 10603 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:39,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2118 Valid, 10603 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:10:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-23 13:10:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 2307. [2021-11-23 13:10:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 1447 states have (on average 1.8410504492052522) internal successors, (2664), 2306 states have internal predecessors, (2664), 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) [2021-11-23 13:10:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2664 transitions. [2021-11-23 13:10:39,893 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2664 transitions. Word has length 22 [2021-11-23 13:10:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:39,894 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2664 transitions. [2021-11-23 13:10:39,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-23 13:10:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2664 transitions. [2021-11-23 13:10:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 13:10:39,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:39,895 INFO L514 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] [2021-11-23 13:10:39,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:40,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:40,107 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-23 13:10:40,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:40,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108143916] [2021-11-23 13:10:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:40,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:40,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:40,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 13:10:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:40,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:40,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:40,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108143916] [2021-11-23 13:10:40,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108143916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:40,483 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:40,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:10:40,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877359402] [2021-11-23 13:10:40,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:40,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:40,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:40,484 INFO L87 Difference]: Start difference. First operand 2307 states and 2664 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-23 13:10:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:44,260 INFO L93 Difference]: Finished difference Result 2762 states and 3030 transitions. [2021-11-23 13:10:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:10:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2021-11-23 13:10:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:44,266 INFO L225 Difference]: With dead ends: 2762 [2021-11-23 13:10:44,266 INFO L226 Difference]: Without dead ends: 2762 [2021-11-23 13:10:44,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:10:44,267 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 2967 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2967 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:44,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2967 Valid, 2375 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 13:10:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-11-23 13:10:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2303. [2021-11-23 13:10:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1447 states have (on average 1.8382861091914307) internal successors, (2660), 2302 states have internal predecessors, (2660), 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) [2021-11-23 13:10:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2660 transitions. [2021-11-23 13:10:44,307 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2660 transitions. Word has length 27 [2021-11-23 13:10:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:44,308 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2660 transitions. [2021-11-23 13:10:44,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-23 13:10:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2660 transitions. [2021-11-23 13:10:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 13:10:44,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:44,310 INFO L514 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] [2021-11-23 13:10:44,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:44,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:44,521 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-23 13:10:44,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:44,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676641322] [2021-11-23 13:10:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:44,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:44,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:44,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:44,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 13:10:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:10:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:44,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:44,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:45,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676641322] [2021-11-23 13:10:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676641322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:45,322 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:45,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:10:45,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54204028] [2021-11-23 13:10:45,322 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:45,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:10:45,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:45,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:10:45,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:10:45,324 INFO L87 Difference]: Start difference. First operand 2303 states and 2660 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-23 13:10:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:56,994 INFO L93 Difference]: Finished difference Result 3384 states and 3739 transitions. [2021-11-23 13:10:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:10:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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 27 [2021-11-23 13:10:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:57,004 INFO L225 Difference]: With dead ends: 3384 [2021-11-23 13:10:57,005 INFO L226 Difference]: Without dead ends: 3384 [2021-11-23 13:10:57,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:10:57,007 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 5661 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5661 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:57,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5661 Valid, 4508 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2021-11-23 13:10:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-23 13:10:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2336. [2021-11-23 13:10:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1481 states have (on average 1.8210668467251856) internal successors, (2697), 2335 states have internal predecessors, (2697), 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) [2021-11-23 13:10:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 2697 transitions. [2021-11-23 13:10:57,064 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 2697 transitions. Word has length 27 [2021-11-23 13:10:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:57,064 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 2697 transitions. [2021-11-23 13:10:57,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-23 13:10:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 2697 transitions. [2021-11-23 13:10:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:10:57,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:57,069 INFO L514 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] [2021-11-23 13:10:57,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:57,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:57,280 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:10:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-23 13:10:57,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:57,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330601079] [2021-11-23 13:10:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:57,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:57,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 13:10:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:10:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:57,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:10:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:57,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:57,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330601079] [2021-11-23 13:10:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330601079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:57,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:10:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090674904] [2021-11-23 13:10:57,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:57,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:10:57,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:10:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:10:57,676 INFO L87 Difference]: Start difference. First operand 2336 states and 2697 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:03,818 INFO L93 Difference]: Finished difference Result 4978 states and 5574 transitions. [2021-11-23 13:11:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:11:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 13:11:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:03,827 INFO L225 Difference]: With dead ends: 4978 [2021-11-23 13:11:03,827 INFO L226 Difference]: Without dead ends: 4978 [2021-11-23 13:11:03,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:03,828 INFO L933 BasicCegarLoop]: 2423 mSDtfsCounter, 5056 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5056 SdHoareTripleChecker+Valid, 4981 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:03,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5056 Valid, 4981 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 13:11:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4978 states. [2021-11-23 13:11:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4978 to 2333. [2021-11-23 13:11:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1481 states have (on average 1.813639432815665) internal successors, (2686), 2332 states have internal predecessors, (2686), 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) [2021-11-23 13:11:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2686 transitions. [2021-11-23 13:11:03,873 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2686 transitions. Word has length 36 [2021-11-23 13:11:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:03,873 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2686 transitions. [2021-11-23 13:11:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2686 transitions. [2021-11-23 13:11:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:11:03,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:03,875 INFO L514 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] [2021-11-23 13:11:03,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:04,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:04,097 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-23 13:11:04,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:04,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120353973] [2021-11-23 13:11:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:04,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:04,100 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 13:11:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:11:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:04,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:11:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:04,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:05,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120353973] [2021-11-23 13:11:05,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120353973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:05,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:05,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:11:05,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447421843] [2021-11-23 13:11:05,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:05,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:11:05,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:11:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:11:05,039 INFO L87 Difference]: Start difference. First operand 2333 states and 2686 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:11:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:24,661 INFO L93 Difference]: Finished difference Result 4911 states and 5447 transitions. [2021-11-23 13:11:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:11:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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 36 [2021-11-23 13:11:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:24,670 INFO L225 Difference]: With dead ends: 4911 [2021-11-23 13:11:24,670 INFO L226 Difference]: Without dead ends: 4911 [2021-11-23 13:11:24,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:11:24,671 INFO L933 BasicCegarLoop]: 2695 mSDtfsCounter, 6657 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6657 SdHoareTripleChecker+Valid, 6524 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:24,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6657 Valid, 6524 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3679 Invalid, 0 Unknown, 0 Unchecked, 19.4s Time] [2021-11-23 13:11:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-23 13:11:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 2333. [2021-11-23 13:11:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1481 states have (on average 1.810938555030385) internal successors, (2682), 2332 states have internal predecessors, (2682), 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) [2021-11-23 13:11:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2682 transitions. [2021-11-23 13:11:24,712 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2682 transitions. Word has length 36 [2021-11-23 13:11:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:24,713 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2682 transitions. [2021-11-23 13:11:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:11:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2682 transitions. [2021-11-23 13:11:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:11:24,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:24,714 INFO L514 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] [2021-11-23 13:11:24,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 13:11:24,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:24,926 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:24,927 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-23 13:11:24,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:24,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565698764] [2021-11-23 13:11:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:24,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:24,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:24,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:24,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 13:11:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:25,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:11:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:25,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:25,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:25,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565698764] [2021-11-23 13:11:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565698764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:25,378 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:25,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:11:25,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607996747] [2021-11-23 13:11:25,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:25,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:11:25,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:11:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:11:25,379 INFO L87 Difference]: Start difference. First operand 2333 states and 2682 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:31,105 INFO L93 Difference]: Finished difference Result 4582 states and 5154 transitions. [2021-11-23 13:11:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:11:31,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 13:11:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:31,109 INFO L225 Difference]: With dead ends: 4582 [2021-11-23 13:11:31,109 INFO L226 Difference]: Without dead ends: 4582 [2021-11-23 13:11:31,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:31,110 INFO L933 BasicCegarLoop]: 3003 mSDtfsCounter, 3773 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3773 SdHoareTripleChecker+Valid, 5359 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:31,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3773 Valid, 5359 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 13:11:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-23 13:11:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 2329. [2021-11-23 13:11:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1481 states have (on average 1.8082376772451048) internal successors, (2678), 2328 states have internal predecessors, (2678), 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) [2021-11-23 13:11:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2678 transitions. [2021-11-23 13:11:31,150 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2678 transitions. Word has length 36 [2021-11-23 13:11:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:31,150 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2678 transitions. [2021-11-23 13:11:31,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2678 transitions. [2021-11-23 13:11:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:11:31,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:31,151 INFO L514 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] [2021-11-23 13:11:31,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:31,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:31,363 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-23 13:11:31,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826255632] [2021-11-23 13:11:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:31,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:31,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:31,370 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:31,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 13:11:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:11:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:11:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:31,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:32,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826255632] [2021-11-23 13:11:32,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826255632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:32,221 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:32,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:11:32,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440961785] [2021-11-23 13:11:32,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:32,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:11:32,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:11:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:11:32,222 INFO L87 Difference]: Start difference. First operand 2329 states and 2678 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:11:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:49,468 INFO L93 Difference]: Finished difference Result 4478 states and 4930 transitions. [2021-11-23 13:11:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:11:49,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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 36 [2021-11-23 13:11:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:49,472 INFO L225 Difference]: With dead ends: 4478 [2021-11-23 13:11:49,472 INFO L226 Difference]: Without dead ends: 4478 [2021-11-23 13:11:49,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:11:49,473 INFO L933 BasicCegarLoop]: 3267 mSDtfsCounter, 2786 mSDsluCounter, 5746 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 9013 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:49,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 9013 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time] [2021-11-23 13:11:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-11-23 13:11:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2325. [2021-11-23 13:11:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1481 states have (on average 1.8055367994598244) internal successors, (2674), 2324 states have internal predecessors, (2674), 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) [2021-11-23 13:11:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 2674 transitions. [2021-11-23 13:11:49,505 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 2674 transitions. Word has length 36 [2021-11-23 13:11:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:49,505 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 2674 transitions. [2021-11-23 13:11:49,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:11:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 2674 transitions. [2021-11-23 13:11:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 13:11:49,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:49,507 INFO L514 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] [2021-11-23 13:11:49,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:49,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:49,718 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-23 13:11:49,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:49,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945931746] [2021-11-23 13:11:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:49,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:49,720 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:49,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 13:11:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:49,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:50,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945931746] [2021-11-23 13:11:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945931746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:50,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 13:11:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256563286] [2021-11-23 13:11:50,037 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:11:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:11:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:11:50,039 INFO L87 Difference]: Start difference. First operand 2325 states and 2674 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:50,111 INFO L93 Difference]: Finished difference Result 2319 states and 2660 transitions. [2021-11-23 13:11:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:11:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-23 13:11:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:50,114 INFO L225 Difference]: With dead ends: 2319 [2021-11-23 13:11:50,114 INFO L226 Difference]: Without dead ends: 2319 [2021-11-23 13:11:50,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:50,116 INFO L933 BasicCegarLoop]: 2080 mSDtfsCounter, 1063 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 5168 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:50,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 5168 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-11-23 13:11:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2319. [2021-11-23 13:11:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1475 states have (on average 1.8033898305084746) internal successors, (2660), 2318 states have internal predecessors, (2660), 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) [2021-11-23 13:11:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2660 transitions. [2021-11-23 13:11:50,146 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2660 transitions. Word has length 40 [2021-11-23 13:11:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 2660 transitions. [2021-11-23 13:11:50,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2660 transitions. [2021-11-23 13:11:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 13:11:50,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:50,148 INFO L514 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] [2021-11-23 13:11:50,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 13:11:50,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:50,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-23 13:11:50,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:50,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400838762] [2021-11-23 13:11:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:50,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:50,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:50,362 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:50,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 13:11:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:50,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:51,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400838762] [2021-11-23 13:11:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400838762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:51,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:51,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:11:51,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519903012] [2021-11-23 13:11:51,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:51,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:51,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:51,209 INFO L87 Difference]: Start difference. First operand 2319 states and 2660 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-23 13:11:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:51,527 INFO L93 Difference]: Finished difference Result 3752 states and 4231 transitions. [2021-11-23 13:11:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:51,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 [2021-11-23 13:11:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:51,531 INFO L225 Difference]: With dead ends: 3752 [2021-11-23 13:11:51,531 INFO L226 Difference]: Without dead ends: 3752 [2021-11-23 13:11:51,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:51,532 INFO L933 BasicCegarLoop]: 2162 mSDtfsCounter, 1507 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 4081 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:51,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 4081 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:11:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-23 13:11:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3099. [2021-11-23 13:11:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2255 states have (on average 1.7787139689578715) internal successors, (4011), 3098 states have internal predecessors, (4011), 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) [2021-11-23 13:11:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4011 transitions. [2021-11-23 13:11:51,578 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4011 transitions. Word has length 48 [2021-11-23 13:11:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:51,579 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 4011 transitions. [2021-11-23 13:11:51,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-23 13:11:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4011 transitions. [2021-11-23 13:11:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 13:11:51,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:51,580 INFO L514 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] [2021-11-23 13:11:51,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:51,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:51,792 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-23 13:11:51,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:51,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122513295] [2021-11-23 13:11:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:51,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:51,794 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:51,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 13:11:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:52,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:52,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:52,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122513295] [2021-11-23 13:11:52,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122513295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:52,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:52,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 13:11:52,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005281775] [2021-11-23 13:11:52,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:52,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:11:52,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:11:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:11:52,202 INFO L87 Difference]: Start difference. First operand 3099 states and 4011 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) [2021-11-23 13:11:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:52,269 INFO L93 Difference]: Finished difference Result 4342 states and 5332 transitions. [2021-11-23 13:11:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:11:52,270 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 51 [2021-11-23 13:11:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:52,273 INFO L225 Difference]: With dead ends: 4342 [2021-11-23 13:11:52,274 INFO L226 Difference]: Without dead ends: 4342 [2021-11-23 13:11:52,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:52,275 INFO L933 BasicCegarLoop]: 3460 mSDtfsCounter, 2087 mSDsluCounter, 4823 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 8283 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:52,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2087 Valid, 8283 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-11-23 13:11:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3075. [2021-11-23 13:11:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 2231 states have (on average 1.77991931869117) internal successors, (3971), 3074 states have internal predecessors, (3971), 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) [2021-11-23 13:11:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 3971 transitions. [2021-11-23 13:11:52,319 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 3971 transitions. Word has length 51 [2021-11-23 13:11:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:52,320 INFO L470 AbstractCegarLoop]: Abstraction has 3075 states and 3971 transitions. [2021-11-23 13:11:52,320 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) [2021-11-23 13:11:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 3971 transitions. [2021-11-23 13:11:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 13:11:52,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:52,321 INFO L514 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] [2021-11-23 13:11:52,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:52,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:52,534 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-23 13:11:52,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:52,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114290542] [2021-11-23 13:11:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:52,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:52,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:52,536 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:52,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 13:11:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:52,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:52,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:52,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114290542] [2021-11-23 13:11:52,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114290542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:52,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:52,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 13:11:52,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939672691] [2021-11-23 13:11:52,983 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:52,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:11:52,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:11:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:11:52,984 INFO L87 Difference]: Start difference. First operand 3075 states and 3971 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) [2021-11-23 13:11:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:53,055 INFO L93 Difference]: Finished difference Result 4078 states and 4821 transitions. [2021-11-23 13:11:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:11:53,055 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 54 [2021-11-23 13:11:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:53,059 INFO L225 Difference]: With dead ends: 4078 [2021-11-23 13:11:53,059 INFO L226 Difference]: Without dead ends: 4078 [2021-11-23 13:11:53,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:53,060 INFO L933 BasicCegarLoop]: 3501 mSDtfsCounter, 2078 mSDsluCounter, 4914 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 8415 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:53,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2078 Valid, 8415 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-11-23 13:11:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3063. [2021-11-23 13:11:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2219 states have (on average 1.7805317710680486) internal successors, (3951), 3062 states have internal predecessors, (3951), 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) [2021-11-23 13:11:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 3951 transitions. [2021-11-23 13:11:53,107 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 3951 transitions. Word has length 54 [2021-11-23 13:11:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:53,107 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 3951 transitions. [2021-11-23 13:11:53,107 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) [2021-11-23 13:11:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 3951 transitions. [2021-11-23 13:11:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 13:11:53,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:53,108 INFO L514 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] [2021-11-23 13:11:53,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:53,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:53,321 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-23 13:11:53,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:53,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161717839] [2021-11-23 13:11:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:53,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:53,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:53,324 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:53,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 13:11:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:11:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:11:53,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:11:53,612 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-23 13:11:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 13:11:53,672 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 13:11:53,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-23 13:11:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:53,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:53,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161717839] [2021-11-23 13:11:53,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161717839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:53,875 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:53,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 13:11:53,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692664910] [2021-11-23 13:11:53,875 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:53,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:11:53,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:11:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:11:53,877 INFO L87 Difference]: Start difference. First operand 3063 states and 3951 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2021-11-23 13:11:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:56,679 INFO L93 Difference]: Finished difference Result 3168 states and 4062 transitions. [2021-11-23 13:11:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:11:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 54 [2021-11-23 13:11:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:56,687 INFO L225 Difference]: With dead ends: 3168 [2021-11-23 13:11:56,687 INFO L226 Difference]: Without dead ends: 3168 [2021-11-23 13:11:56,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:11:56,689 INFO L933 BasicCegarLoop]: 1971 mSDtfsCounter, 1007 mSDsluCounter, 4818 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 6789 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:56,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 6789 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 13:11:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-11-23 13:11:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 3029. [2021-11-23 13:11:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2185 states have (on average 1.7922196796338672) internal successors, (3916), 3028 states have internal predecessors, (3916), 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) [2021-11-23 13:11:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3916 transitions. [2021-11-23 13:11:56,729 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3916 transitions. Word has length 54 [2021-11-23 13:11:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:56,729 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 3916 transitions. [2021-11-23 13:11:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2021-11-23 13:11:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3916 transitions. [2021-11-23 13:11:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 13:11:56,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:56,730 INFO L514 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] [2021-11-23 13:11:56,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:56,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:56,943 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-23 13:11:56,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:56,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233820583] [2021-11-23 13:11:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:56,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:56,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:56,946 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:56,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 13:11:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:11:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:57,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:57,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233820583] [2021-11-23 13:11:57,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233820583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:57,801 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:57,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:11:57,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854089815] [2021-11-23 13:11:57,801 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:57,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:11:57,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:11:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:57,802 INFO L87 Difference]: Start difference. First operand 3029 states and 3916 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-23 13:11:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:57,949 INFO L93 Difference]: Finished difference Result 4404 states and 5506 transitions. [2021-11-23 13:11:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:11:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-23 13:11:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:57,955 INFO L225 Difference]: With dead ends: 4404 [2021-11-23 13:11:57,955 INFO L226 Difference]: Without dead ends: 4404 [2021-11-23 13:11:57,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:11:57,956 INFO L933 BasicCegarLoop]: 2086 mSDtfsCounter, 1179 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:57,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 4033 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:11:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-11-23 13:11:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3813. [2021-11-23 13:11:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 2969 states have (on average 1.7615358706635231) internal successors, (5230), 3812 states have internal predecessors, (5230), 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) [2021-11-23 13:11:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5230 transitions. [2021-11-23 13:11:58,015 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5230 transitions. Word has length 59 [2021-11-23 13:11:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:58,016 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5230 transitions. [2021-11-23 13:11:58,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-23 13:11:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5230 transitions. [2021-11-23 13:11:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 13:11:58,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:58,017 INFO L514 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] [2021-11-23 13:11:58,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:58,230 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:11:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-23 13:11:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608997532] [2021-11-23 13:11:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:58,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:58,232 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 13:11:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:11:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:11:58,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:11:59,131 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:11:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-23 13:11:59,145 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 13:11:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 13:11:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:59,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:04,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608997532] [2021-11-23 13:12:04,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608997532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:04,548 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:04,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:12:04,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016149210] [2021-11-23 13:12:04,548 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:04,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:12:04,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:12:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-23 13:12:04,549 INFO L87 Difference]: Start difference. First operand 3813 states and 5230 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:12:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:13,624 INFO L93 Difference]: Finished difference Result 5689 states and 7772 transitions. [2021-11-23 13:12:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:12:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 13:12:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:13,630 INFO L225 Difference]: With dead ends: 5689 [2021-11-23 13:12:13,631 INFO L226 Difference]: Without dead ends: 5689 [2021-11-23 13:12:13,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-23 13:12:13,632 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 2975 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2975 SdHoareTripleChecker+Valid, 3713 SdHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1334 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:13,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2975 Valid, 3713 Invalid, 4013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2593 Invalid, 0 Unknown, 1334 Unchecked, 8.9s Time] [2021-11-23 13:12:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2021-11-23 13:12:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3805. [2021-11-23 13:12:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3022 states have (on average 1.7183984116479152) internal successors, (5193), 3804 states have internal predecessors, (5193), 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) [2021-11-23 13:12:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 5193 transitions. [2021-11-23 13:12:13,696 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 5193 transitions. Word has length 62 [2021-11-23 13:12:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:13,697 INFO L470 AbstractCegarLoop]: Abstraction has 3805 states and 5193 transitions. [2021-11-23 13:12:13,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:12:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 5193 transitions. [2021-11-23 13:12:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:12:13,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:13,698 INFO L514 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] [2021-11-23 13:12:13,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-23 13:12:13,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:13,918 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr393REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:12:13,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1201169645, now seen corresponding path program 1 times [2021-11-23 13:12:13,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:13,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090581006] [2021-11-23 13:12:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:13,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:13,920 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:13,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 13:12:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:12:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:14,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:14,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-23 13:12:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:14,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:14,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090581006] [2021-11-23 13:12:14,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090581006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:14,692 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:14,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:12:14,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418108222] [2021-11-23 13:12:14,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:14,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:12:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:12:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:14,694 INFO L87 Difference]: Start difference. First operand 3805 states and 5193 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 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) [2021-11-23 13:12:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:18,837 INFO L93 Difference]: Finished difference Result 3806 states and 5186 transitions. [2021-11-23 13:12:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 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 [2021-11-23 13:12:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:18,842 INFO L225 Difference]: With dead ends: 3806 [2021-11-23 13:12:18,843 INFO L226 Difference]: Without dead ends: 3806 [2021-11-23 13:12:18,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:18,843 INFO L933 BasicCegarLoop]: 1350 mSDtfsCounter, 1813 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:18,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 2155 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 13:12:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-11-23 13:12:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3802. [2021-11-23 13:12:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3022 states have (on average 1.7160820648577102) internal successors, (5186), 3801 states have internal predecessors, (5186), 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) [2021-11-23 13:12:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 5186 transitions. [2021-11-23 13:12:18,890 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 5186 transitions. Word has length 64 [2021-11-23 13:12:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:18,891 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 5186 transitions. [2021-11-23 13:12:18,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 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) [2021-11-23 13:12:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 5186 transitions. [2021-11-23 13:12:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 13:12:18,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:18,893 INFO L514 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] [2021-11-23 13:12:18,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:19,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:19,106 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:12:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-23 13:12:19,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:19,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611236456] [2021-11-23 13:12:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:19,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:19,108 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:19,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 13:12:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:12:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:19,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:12:19,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 13:12:19,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 13:12:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:19,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611236456] [2021-11-23 13:12:19,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611236456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:19,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:19,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 13:12:19,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945345701] [2021-11-23 13:12:19,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:19,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:12:19,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:12:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:19,659 INFO L87 Difference]: Start difference. First operand 3802 states and 5186 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:12:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:28,759 INFO L93 Difference]: Finished difference Result 6218 states and 8419 transitions. [2021-11-23 13:12:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:12:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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 [2021-11-23 13:12:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:28,766 INFO L225 Difference]: With dead ends: 6218 [2021-11-23 13:12:28,766 INFO L226 Difference]: Without dead ends: 6218 [2021-11-23 13:12:28,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:12:28,767 INFO L933 BasicCegarLoop]: 1348 mSDtfsCounter, 1864 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 5930 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:28,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 5930 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4260 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 13:12:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2021-11-23 13:12:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 3801. [2021-11-23 13:12:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3022 states have (on average 1.715089344804765) internal successors, (5183), 3800 states have internal predecessors, (5183), 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) [2021-11-23 13:12:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5183 transitions. [2021-11-23 13:12:28,824 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5183 transitions. Word has length 68 [2021-11-23 13:12:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:28,824 INFO L470 AbstractCegarLoop]: Abstraction has 3801 states and 5183 transitions. [2021-11-23 13:12:28,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:12:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5183 transitions. [2021-11-23 13:12:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 13:12:28,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:28,826 INFO L514 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] [2021-11-23 13:12:28,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:29,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:29,039 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:12:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-23 13:12:29,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042453699] [2021-11-23 13:12:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:29,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:29,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:29,041 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:29,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 13:12:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:12:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:29,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:12:29,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 13:12:29,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 13:12:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:29,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:29,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042453699] [2021-11-23 13:12:29,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042453699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:29,542 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:29,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 13:12:29,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629015987] [2021-11-23 13:12:29,542 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:29,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:12:29,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:12:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:29,543 INFO L87 Difference]: Start difference. First operand 3801 states and 5183 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:12:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:38,748 INFO L93 Difference]: Finished difference Result 6210 states and 8405 transitions. [2021-11-23 13:12:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:12:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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 [2021-11-23 13:12:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:38,754 INFO L225 Difference]: With dead ends: 6210 [2021-11-23 13:12:38,754 INFO L226 Difference]: Without dead ends: 6210 [2021-11-23 13:12:38,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:12:38,755 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 1864 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 4256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:38,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 5929 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4256 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 13:12:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2021-11-23 13:12:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 3800. [2021-11-23 13:12:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3022 states have (on average 1.714427531436135) internal successors, (5181), 3799 states have internal predecessors, (5181), 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) [2021-11-23 13:12:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5181 transitions. [2021-11-23 13:12:38,796 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5181 transitions. Word has length 68 [2021-11-23 13:12:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:38,796 INFO L470 AbstractCegarLoop]: Abstraction has 3800 states and 5181 transitions. [2021-11-23 13:12:38,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 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) [2021-11-23 13:12:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5181 transitions. [2021-11-23 13:12:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:12:38,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:38,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:38,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:38,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:38,997 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:12:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-23 13:12:38,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:38,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651912055] [2021-11-23 13:12:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:38,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:38,999 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:39,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 13:12:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:12:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:12:39,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 13:12:39,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 13:12:39,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 13:12:39,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 13:12:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:39,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:39,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:39,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651912055] [2021-11-23 13:12:39,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651912055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:39,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:39,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 13:12:39,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695299317] [2021-11-23 13:12:39,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:39,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:12:39,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:12:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:12:39,856 INFO L87 Difference]: Start difference. First operand 3800 states and 5181 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:11,228 INFO L93 Difference]: Finished difference Result 5699 states and 7685 transitions. [2021-11-23 13:13:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:13:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 13:13:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:11,236 INFO L225 Difference]: With dead ends: 5699 [2021-11-23 13:13:11,236 INFO L226 Difference]: Without dead ends: 5699 [2021-11-23 13:13:11,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:13:11,237 INFO L933 BasicCegarLoop]: 1310 mSDtfsCounter, 1873 mSDsluCounter, 7802 mSDsCounter, 0 mSdLazyCounter, 6818 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 9112 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:11,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 9112 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6818 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time] [2021-11-23 13:13:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2021-11-23 13:13:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 3799. [2021-11-23 13:13:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3022 states have (on average 1.7134348113831899) internal successors, (5178), 3798 states have internal predecessors, (5178), 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) [2021-11-23 13:13:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5178 transitions. [2021-11-23 13:13:11,293 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5178 transitions. Word has length 69 [2021-11-23 13:13:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:11,293 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5178 transitions. [2021-11-23 13:13:11,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5178 transitions. [2021-11-23 13:13:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:13:11,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:11,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:11,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:13:11,508 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:13:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-23 13:13:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:13:11,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723789881] [2021-11-23 13:13:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:13:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:13:11,510 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:13:11,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 13:13:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:13:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:13:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 13:13:11,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 13:13:11,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 13:13:11,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 13:13:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:12,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:12,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:13:12,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723789881] [2021-11-23 13:13:12,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723789881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:13:12,419 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:13:12,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 13:13:12,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465256425] [2021-11-23 13:13:12,420 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:13:12,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:13:12,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:13:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:13:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:13:12,420 INFO L87 Difference]: Start difference. First operand 3799 states and 5178 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:41,765 INFO L93 Difference]: Finished difference Result 5694 states and 7676 transitions. [2021-11-23 13:13:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:13:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 13:13:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:41,770 INFO L225 Difference]: With dead ends: 5694 [2021-11-23 13:13:41,770 INFO L226 Difference]: Without dead ends: 5694 [2021-11-23 13:13:41,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:13:41,771 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 1879 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 5893 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 7931 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:41,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 7931 Invalid, 5911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5893 Invalid, 0 Unknown, 0 Unchecked, 29.0s Time] [2021-11-23 13:13:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-11-23 13:13:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 3798. [2021-11-23 13:13:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3022 states have (on average 1.7127729980145598) internal successors, (5176), 3797 states have internal predecessors, (5176), 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) [2021-11-23 13:13:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5176 transitions. [2021-11-23 13:13:41,809 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5176 transitions. Word has length 69 [2021-11-23 13:13:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:41,810 INFO L470 AbstractCegarLoop]: Abstraction has 3798 states and 5176 transitions. [2021-11-23 13:13:41,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5176 transitions. [2021-11-23 13:13:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 13:13:41,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:41,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:41,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:42,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:13:42,024 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:13:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-23 13:13:42,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:13:42,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981823860] [2021-11-23 13:13:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:42,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:13:42,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:13:42,026 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:13:42,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 13:13:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:13:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:42,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:42,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:13:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981823860] [2021-11-23 13:13:42,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981823860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:13:42,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:13:42,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 13:13:42,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814896778] [2021-11-23 13:13:42,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:13:42,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:13:42,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:13:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:13:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:13:42,514 INFO L87 Difference]: Start difference. First operand 3798 states and 5176 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:42,856 INFO L93 Difference]: Finished difference Result 6959 states and 9406 transitions. [2021-11-23 13:13:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:13:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 13:13:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:42,861 INFO L225 Difference]: With dead ends: 6959 [2021-11-23 13:13:42,861 INFO L226 Difference]: Without dead ends: 6959 [2021-11-23 13:13:42,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:13:42,862 INFO L933 BasicCegarLoop]: 2542 mSDtfsCounter, 1997 mSDsluCounter, 9392 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 11934 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:42,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 11934 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:13:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2021-11-23 13:13:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 3813. [2021-11-23 13:13:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3037 states have (on average 1.7092525518603885) internal successors, (5191), 3812 states have internal predecessors, (5191), 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) [2021-11-23 13:13:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5191 transitions. [2021-11-23 13:13:42,904 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5191 transitions. Word has length 73 [2021-11-23 13:13:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:42,905 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5191 transitions. [2021-11-23 13:13:42,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5191 transitions. [2021-11-23 13:13:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 13:13:42,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:42,906 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:13:42,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:43,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:13:43,120 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:13:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-23 13:13:43,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:13:43,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709376021] [2021-11-23 13:13:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:43,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:13:43,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:13:43,122 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:13:43,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 13:13:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:13:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:43,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:13:43,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709376021] [2021-11-23 13:13:43,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709376021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:43,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:13:43,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-23 13:13:43,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35790740] [2021-11-23 13:13:43,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:43,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:13:43,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:13:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:13:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:13:43,783 INFO L87 Difference]: Start difference. First operand 3813 states and 5191 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:44,442 INFO L93 Difference]: Finished difference Result 6253 states and 8439 transitions. [2021-11-23 13:13:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:13:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 13:13:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:44,449 INFO L225 Difference]: With dead ends: 6253 [2021-11-23 13:13:44,449 INFO L226 Difference]: Without dead ends: 6253 [2021-11-23 13:13:44,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:13:44,450 INFO L933 BasicCegarLoop]: 2124 mSDtfsCounter, 1667 mSDsluCounter, 9705 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 11829 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:44,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 11829 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:13:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-11-23 13:13:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3843. [2021-11-23 13:13:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3067 states have (on average 1.7023149657645908) internal successors, (5221), 3842 states have internal predecessors, (5221), 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) [2021-11-23 13:13:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 5221 transitions. [2021-11-23 13:13:44,513 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 5221 transitions. Word has length 75 [2021-11-23 13:13:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 3843 states and 5221 transitions. [2021-11-23 13:13:44,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:13:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 5221 transitions. [2021-11-23 13:13:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 13:13:44,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:44,515 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:44,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:44,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:13:44,723 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 13:13:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-23 13:13:44,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:13:44,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438306551] [2021-11-23 13:13:44,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:13:44,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:13:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:13:44,726 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:13:44,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbdc3718-5e9a-42bc-b29d-95160f8f8cb4/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 13:13:45,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 13:13:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:13:45,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:45,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:13:45,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:13:45,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:13:45,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:13:45,200 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-23 13:13:45,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 13:13:45,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 13:13:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 13:13:45,521 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-23 13:13:45,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-23 13:13:51,144 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-23 13:13:51,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-23 13:14:00,833 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-23 13:14:00,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-23 13:14:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 13:14:01,002 INFO L328 TraceCheckSpWp]: Computing backward predicates...