./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:09:40,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:09:40,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:09:40,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:09:40,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:09:40,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:09:40,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:09:40,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:09:40,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:09:40,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:09:40,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:09:40,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:09:40,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:09:40,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:09:40,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:09:40,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:09:40,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:09:40,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:09:40,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:09:40,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:09:40,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:09:40,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:09:40,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:09:40,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:09:40,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:09:40,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:09:40,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:09:40,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:09:40,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:09:40,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:09:40,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:09:40,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:09:40,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:09:40,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:09:40,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:09:40,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:09:40,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:09:40,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:09:40,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:09:40,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:09:40,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:09:40,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:09:40,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:09:40,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:09:40,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:09:40,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:09:40,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:09:40,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:09:40,409 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:09:40,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:09:40,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:09:40,410 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:09:40,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:09:40,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:09:40,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:09:40,412 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:09:40,412 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:09:40,412 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:09:40,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:09:40,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:09:40,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:09:40,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:09:40,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:09:40,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:09:40,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:09:40,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:40,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:09:40,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:09:40,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:09:40,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:09:40,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:09:40,417 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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-11-23 13:09:40,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:09:40,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:09:40,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:09:40,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:09:40,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:09:40,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 13:09:40,865 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/a22d194c1/ca1456a6bd994d9d9cad055432a636fb/FLAGda515705a [2021-11-23 13:09:41,471 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:09:41,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 13:09:41,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/a22d194c1/ca1456a6bd994d9d9cad055432a636fb/FLAGda515705a [2021-11-23 13:09:41,738 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/a22d194c1/ca1456a6bd994d9d9cad055432a636fb [2021-11-23 13:09:41,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:09:41,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:09:41,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:41,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:09:41,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:09:41,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:41" (1/1) ... [2021-11-23 13:09:41,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d2accd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:41, skipping insertion in model container [2021-11-23 13:09:41,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:41" (1/1) ... [2021-11-23 13:09:41,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:09:41,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:42,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:42,152 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 13:09:42,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e743d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:42, skipping insertion in model container [2021-11-23 13:09:42,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:42,156 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 13:09:42,159 INFO L158 Benchmark]: Toolchain (without parser) took 415.53ms. Allocated memory was 90.2MB in the beginning and 125.8MB in the end (delta: 35.7MB). Free memory was 54.6MB in the beginning and 100.5MB in the end (delta: -45.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 13:09:42,162 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 24.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:09:42,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 412.46ms. Allocated memory was 90.2MB in the beginning and 125.8MB in the end (delta: 35.7MB). Free memory was 54.4MB in the beginning and 100.5MB in the end (delta: -46.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:09:42,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 24.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 412.46ms. Allocated memory was 90.2MB in the beginning and 125.8MB in the end (delta: 35.7MB). Free memory was 54.4MB in the beginning and 100.5MB in the end (delta: -46.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: 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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:09:44,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:09:44,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:09:44,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:09:44,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:09:44,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:09:44,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:09:44,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:09:44,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:09:44,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:09:44,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:09:44,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:09:44,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:09:44,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:09:44,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:09:44,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:09:44,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:09:44,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:09:44,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:09:44,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:09:44,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:09:44,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:09:44,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:09:44,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:09:44,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:09:44,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:09:44,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:09:44,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:09:44,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:09:44,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:09:44,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:09:44,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:09:44,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:09:44,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:09:44,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:09:44,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:09:44,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:09:44,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:09:44,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:09:44,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:09:44,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:09:44,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-23 13:09:44,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:09:44,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:09:44,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:09:44,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:09:44,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:09:44,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:09:44,938 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:09:44,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:09:44,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:09:44,939 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:09:44,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:09:44,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:09:44,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:09:44,939 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:09:44,940 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:09:44,940 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:09:44,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:09:44,940 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:09:44,940 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 13:09:44,940 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 13:09:44,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:09:44,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:09:44,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:09:44,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:09:44,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:09:44,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:44,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:09:44,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:09:44,946 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 13:09:44,946 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 13:09:44,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:09:44,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 13:09:44,947 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_5e6470e8-7b31-4eb5-9199-127e6aa0c663/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-11-23 13:09:45,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:09:45,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:09:45,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:09:45,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:09:45,386 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:09:45,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 13:09:45,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/ca995bca9/86c80a96a0e049a7b93eb798d0451c01/FLAG7cb71eedd [2021-11-23 13:09:46,124 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:09:46,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 13:09:46,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/ca995bca9/86c80a96a0e049a7b93eb798d0451c01/FLAG7cb71eedd [2021-11-23 13:09:46,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/data/ca995bca9/86c80a96a0e049a7b93eb798d0451c01 [2021-11-23 13:09:46,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:09:46,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:09:46,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:46,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:09:46,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:09:46,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:46,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398bcf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46, skipping insertion in model container [2021-11-23 13:09:46,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:46,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:09:46,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:46,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:46,831 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 13:09:46,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:46,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:46,890 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:09:46,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:46,959 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:09:46,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46 WrapperNode [2021-11-23 13:09:46,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:46,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:46,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:09:46,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:09:46,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:46,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,010 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-23 13:09:47,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:47,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:09:47,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:09:47,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:09:47,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:09:47,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:09:47,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:09:47,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:09:47,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (1/1) ... [2021-11-23 13:09:47,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:47,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:09:47,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:09:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 13:09:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:09:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:09:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 13:09:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:09:47,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:09:47,267 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:09:47,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:09:47,677 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:09:47,684 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:09:47,685 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:09:47,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:09:47 BoogieIcfgContainer [2021-11-23 13:09:47,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:09:47,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:09:47,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:09:47,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:09:47,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:09:46" (1/3) ... [2021-11-23 13:09:47,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a83cb35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:09:47, skipping insertion in model container [2021-11-23 13:09:47,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:46" (2/3) ... [2021-11-23 13:09:47,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a83cb35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:09:47, skipping insertion in model container [2021-11-23 13:09:47,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:09:47" (3/3) ... [2021-11-23 13:09:47,697 INFO L111 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca-2.i [2021-11-23 13:09:47,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:09:47,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-23 13:09:47,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:09:47,768 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 13:09:47,768 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-23 13:09:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 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 13:09:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:09:47,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:47,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:09:47,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-23 13:09:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:47,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245116062] [2021-11-23 13:09:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:47,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:47,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:47,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 13:09:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:09:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:48,034 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 13:09:48,059 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 13:09:48,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:48,096 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 13:09:48,098 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245116062] [2021-11-23 13:09:48,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245116062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:48,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:48,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 13:09:48,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273251163] [2021-11-23 13:09:48,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:48,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:48,179 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 13:09:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:48,340 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-23 13:09:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:09:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:48,353 INFO L225 Difference]: With dead ends: 40 [2021-11-23 13:09:48,353 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 13:09:48,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 13:09:48,360 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:48,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:09:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 13:09:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 13:09:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 13:09:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 13:09:48,405 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-11-23 13:09:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:48,406 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 13:09:48,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 13:09:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 13:09:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:09:48,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:48,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:09:48,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:48,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:48,621 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-23 13:09:48,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:48,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104419248] [2021-11-23 13:09:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:48,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:48,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:48,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 13:09:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:09:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:48,717 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 13:09:48,758 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 13:09:48,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:49,021 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 13:09:49,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104419248] [2021-11-23 13:09:49,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104419248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:49,022 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:49,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:09:49,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086222673] [2021-11-23 13:09:49,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:49,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:09:49,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:09:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:09:49,026 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:50,011 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-11-23 13:09:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:09:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:09:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:50,015 INFO L225 Difference]: With dead ends: 108 [2021-11-23 13:09:50,015 INFO L226 Difference]: Without dead ends: 108 [2021-11-23 13:09:50,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:09:50,017 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 149 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:50,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 117 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:09:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-23 13:09:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 42. [2021-11-23 13:09:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-23 13:09:50,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-23 13:09:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:50,026 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-23 13:09:50,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-23 13:09:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:09:50,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:50,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:50,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:50,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:50,234 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:50,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-11-23 13:09:50,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:50,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007616996] [2021-11-23 13:09:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:50,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:50,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:50,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 13:09:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:09:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:50,360 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 13:09:50,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:50,434 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 13:09:50,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:50,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007616996] [2021-11-23 13:09:50,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007616996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:50,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:50,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 13:09:50,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213515533] [2021-11-23 13:09:50,441 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:50,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:09:50,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:09:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:09:50,443 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 13:09:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:50,534 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-11-23 13:09:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:09:50,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 9 [2021-11-23 13:09:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:50,538 INFO L225 Difference]: With dead ends: 67 [2021-11-23 13:09:50,538 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 13:09:50,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:09:50,540 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:50,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 79 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:09:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 13:09:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-11-23 13:09:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 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 13:09:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-23 13:09:50,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 9 [2021-11-23 13:09:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:50,548 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-23 13:09:50,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 13:09:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-23 13:09:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:09:50,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:50,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:50,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:50,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:50,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052884, now seen corresponding path program 1 times [2021-11-23 13:09:50,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:50,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692012594] [2021-11-23 13:09:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:50,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:50,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:50,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 13:09:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:09:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:50,851 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 13:09:50,895 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 13:09:50,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:50,926 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 13:09:50,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692012594] [2021-11-23 13:09:50,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692012594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:50,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:50,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:09:50,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913599787] [2021-11-23 13:09:50,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:50,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:09:50,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:09:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:09:50,930 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:51,111 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-23 13:09:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:09:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 13:09:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:51,113 INFO L225 Difference]: With dead ends: 37 [2021-11-23 13:09:51,113 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 13:09:51,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 13:09:51,114 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:51,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:09:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 13:09:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 13:09:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 13:09:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-23 13:09:51,120 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2021-11-23 13:09:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:51,121 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-23 13:09:51,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-23 13:09:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:09:51,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:51,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:51,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:51,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:51,333 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052885, now seen corresponding path program 1 times [2021-11-23 13:09:51,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:51,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363982931] [2021-11-23 13:09:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:51,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:51,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:51,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:51,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 13:09:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:09:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:51,452 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 8 treesize of output 7 [2021-11-23 13:09:51,530 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 13:09:51,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:51,964 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 13:09:51,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:51,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363982931] [2021-11-23 13:09:51,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363982931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:51,964 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:51,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-23 13:09:51,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391153674] [2021-11-23 13:09:51,965 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:51,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:09:51,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:09:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:09:51,966 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 13:09:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:52,561 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-23 13:09:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:09:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 9 [2021-11-23 13:09:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:52,563 INFO L225 Difference]: With dead ends: 44 [2021-11-23 13:09:52,564 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 13:09:52,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:09:52,565 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:52,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 43 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:09:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 13:09:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-11-23 13:09:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 34 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 13:09:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-23 13:09:52,570 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 9 [2021-11-23 13:09:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:52,571 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-23 13:09:52,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 13:09:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-23 13:09:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:09:52,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:52,572 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:52,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:52,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:52,782 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-23 13:09:52,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:52,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123269468] [2021-11-23 13:09:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:52,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:52,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:52,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 13:09:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:09:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:52,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:52,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123269468] [2021-11-23 13:09:52,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123269468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:09:52,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:09:52,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 13:09:52,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261539867] [2021-11-23 13:09:52,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:09:52,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:09:52,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:09:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:09:52,992 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 13:09:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:53,081 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-23 13:09:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:09:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 13:09:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:53,086 INFO L225 Difference]: With dead ends: 65 [2021-11-23 13:09:53,086 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 13:09:53,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:09:53,087 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:53,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 104 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:09:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 13:09:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-11-23 13:09:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 13:09:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-23 13:09:53,093 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2021-11-23 13:09:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:53,096 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-23 13:09:53,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 13:09:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-23 13:09:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:09:53,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:53,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:53,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:53,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:53,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-23 13:09:53,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:53,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142527425] [2021-11-23 13:09:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:53,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:53,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:53,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 13:09:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:09:53,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:53,392 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 8 treesize of output 7 [2021-11-23 13:09:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:53,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:54,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:54,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142527425] [2021-11-23 13:09:54,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142527425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:09:54,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:09:54,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-23 13:09:54,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785917588] [2021-11-23 13:09:54,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:09:54,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:09:54,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:09:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:09:54,251 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:55,100 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-23 13:09:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:09:55,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 13:09:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:55,102 INFO L225 Difference]: With dead ends: 73 [2021-11-23 13:09:55,102 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 13:09:55,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:09:55,104 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:55,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 91 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 6 Unchecked, 0.8s Time] [2021-11-23 13:09:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 13:09:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-11-23 13:09:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.302325581395349) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 13:09:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-23 13:09:55,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 10 [2021-11-23 13:09:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:55,111 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-23 13:09:55,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-23 13:09:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:09:55,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:55,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:55,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:55,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:55,317 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1604187901, now seen corresponding path program 1 times [2021-11-23 13:09:55,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214496745] [2021-11-23 13:09:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:55,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:55,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:55,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:55,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 13:09:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:09:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:09:55,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:09:55,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214496745] [2021-11-23 13:09:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214496745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:55,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:55,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 13:09:55,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209163705] [2021-11-23 13:09:55,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:55,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:09:55,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:55,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:09:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:09:55,511 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:55,738 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-23 13:09:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:09:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:09:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:55,740 INFO L225 Difference]: With dead ends: 57 [2021-11-23 13:09:55,740 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 13:09:55,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:09:55,741 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:55,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 117 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:09:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 13:09:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-11-23 13:09:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-23 13:09:55,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2021-11-23 13:09:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:55,748 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-23 13:09:55,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:09:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-23 13:09:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:09:55,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:55,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:55,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:55,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:55,950 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-11-23 13:09:55,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614379374] [2021-11-23 13:09:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:55,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:55,952 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:55,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 13:09:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:09:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:56,019 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 8 treesize of output 7 [2021-11-23 13:09:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:09:56,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:09:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:09:57,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:09:57,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614379374] [2021-11-23 13:09:57,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614379374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:57,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:57,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-23 13:09:57,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263801380] [2021-11-23 13:09:57,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:57,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:09:57,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:09:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:09:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:09:57,033 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 13:09:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:58,390 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-11-23 13:09:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:09:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 14 [2021-11-23 13:09:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:58,391 INFO L225 Difference]: With dead ends: 78 [2021-11-23 13:09:58,391 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 13:09:58,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:09:58,392 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:58,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 101 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 97 Invalid, 0 Unknown, 9 Unchecked, 0.5s Time] [2021-11-23 13:09:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 13:09:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-11-23 13:09:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 13:09:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-23 13:09:58,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 14 [2021-11-23 13:09:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:58,400 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-23 13:09:58,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 13:09:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-23 13:09:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:09:58,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:58,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:58,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:09:58,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:09:58,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:09:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:58,610 INFO L85 PathProgramCache]: Analyzing trace with hash 267720213, now seen corresponding path program 1 times [2021-11-23 13:09:58,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:09:58,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360353591] [2021-11-23 13:09:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:58,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:09:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:09:58,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:09:58,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 13:09:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:09:58,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:09:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:09:58,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:10:04,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:04,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360353591] [2021-11-23 13:10:04,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360353591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:04,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:04,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 13:10:04,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694418651] [2021-11-23 13:10:04,895 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:04,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:10:04,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:10:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-23 13:10:04,896 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 13:10:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:05,027 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-11-23 13:10:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:10:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:10:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:05,030 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:10:05,030 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 13:10:05,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-23 13:10:05,031 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:05,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 65 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 13:10:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 13:10:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 13:10:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 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 13:10:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-23 13:10:05,036 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 16 [2021-11-23 13:10:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:05,036 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-23 13:10:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 13:10:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-23 13:10:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:10:05,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:05,038 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 13:10:05,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:05,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:05,239 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-23 13:10:05,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:05,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212163459] [2021-11-23 13:10:05,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:10:05,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:05,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:05,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:05,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 13:10:05,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:10:05,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:10:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:05,350 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 8 treesize of output 7 [2021-11-23 13:10:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:05,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:07,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212163459] [2021-11-23 13:10:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212163459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:07,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:07,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-23 13:10:07,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246359558] [2021-11-23 13:10:07,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:07,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:10:07,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:10:07,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:10:07,337 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 13:10:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:10,557 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2021-11-23 13:10:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:10:10,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 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 18 [2021-11-23 13:10:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:10,561 INFO L225 Difference]: With dead ends: 191 [2021-11-23 13:10:10,561 INFO L226 Difference]: Without dead ends: 191 [2021-11-23 13:10:10,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-23 13:10:10,562 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 403 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:10,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 242 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 51 Unchecked, 1.7s Time] [2021-11-23 13:10:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-23 13:10:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 61. [2021-11-23 13:10:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 13:10:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-23 13:10:10,577 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 18 [2021-11-23 13:10:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:10,577 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-23 13:10:10,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 13:10:10,578 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-23 13:10:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:10:10,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:10,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:10,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:10,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:10,797 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash -511718013, now seen corresponding path program 1 times [2021-11-23 13:10:10,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872824369] [2021-11-23 13:10:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:10,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:10,799 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:10,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 13:10:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:10:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:10:11,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:11,247 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 11 treesize of output 9 [2021-11-23 13:10:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:10:11,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:11,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872824369] [2021-11-23 13:10:11,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872824369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:11,480 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:11,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 13:10:11,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966441165] [2021-11-23 13:10:11,480 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:11,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:10:11,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:10:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:10:11,482 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:11,867 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-11-23 13:10:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:10:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 13:10:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:11,870 INFO L225 Difference]: With dead ends: 79 [2021-11-23 13:10:11,870 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 13:10:11,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:10:11,871 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:11,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 65 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:10:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 13:10:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-11-23 13:10:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.263157894736842) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-11-23 13:10:11,879 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2021-11-23 13:10:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:11,879 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-11-23 13:10:11,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-11-23 13:10:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:10:11,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:11,881 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:11,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:12,092 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-11-23 13:10:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:12,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491206369] [2021-11-23 13:10:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:12,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:12,094 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:12,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 13:10:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:12,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:10:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:12,182 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 13 treesize of output 12 [2021-11-23 13:10:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:10:12,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:10:13,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491206369] [2021-11-23 13:10:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491206369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:13,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:13,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-11-23 13:10:13,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632623967] [2021-11-23 13:10:13,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:13,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:10:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:10:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:10:13,461 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 13:10:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:13,940 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-11-23 13:10:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:10:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 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 18 [2021-11-23 13:10:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:13,943 INFO L225 Difference]: With dead ends: 75 [2021-11-23 13:10:13,943 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 13:10:13,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:10:13,944 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:13,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-11-23 13:10:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 13:10:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-11-23 13:10:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-11-23 13:10:13,951 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 18 [2021-11-23 13:10:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:13,951 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-11-23 13:10:13,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 13:10:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-11-23 13:10:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:10:13,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:13,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:13,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:14,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:14,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1331880655, now seen corresponding path program 1 times [2021-11-23 13:10:14,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:14,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035924536] [2021-11-23 13:10:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:14,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:14,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:14,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:14,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 13:10:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:10:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:14,247 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 8 treesize of output 7 [2021-11-23 13:10:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:14,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:15,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:15,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035924536] [2021-11-23 13:10:15,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035924536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:15,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:15,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-11-23 13:10:15,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793673220] [2021-11-23 13:10:15,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:15,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:10:15,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:10:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:10:15,925 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 13:10:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:16,696 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-11-23 13:10:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:10:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 19 [2021-11-23 13:10:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:16,698 INFO L225 Difference]: With dead ends: 74 [2021-11-23 13:10:16,698 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 13:10:16,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:10:16,699 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:16,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 70 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 111 Invalid, 0 Unknown, 6 Unchecked, 0.6s Time] [2021-11-23 13:10:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 13:10:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-23 13:10:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 13:10:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2021-11-23 13:10:16,704 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 19 [2021-11-23 13:10:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:16,705 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2021-11-23 13:10:16,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 13:10:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2021-11-23 13:10:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:10:16,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:16,706 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:16,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:16,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:16,913 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:16,914 INFO L85 PathProgramCache]: Analyzing trace with hash -131403199, now seen corresponding path program 1 times [2021-11-23 13:10:16,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:16,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531795405] [2021-11-23 13:10:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:16,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:16,915 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:16,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 13:10:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:10:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:10:17,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:10:17,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531795405] [2021-11-23 13:10:17,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531795405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:17,163 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:17,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-23 13:10:17,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583602314] [2021-11-23 13:10:17,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:17,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:10:17,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:10:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:10:17,165 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:17,613 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2021-11-23 13:10:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:10:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:10:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:17,615 INFO L225 Difference]: With dead ends: 96 [2021-11-23 13:10:17,616 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 13:10:17,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:10:17,617 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:17,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 67 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:10:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 13:10:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2021-11-23 13:10:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 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 13:10:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-11-23 13:10:17,621 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 20 [2021-11-23 13:10:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:17,622 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-11-23 13:10:17,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-11-23 13:10:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:10:17,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:17,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:17,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:17,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:17,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:17,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 2 times [2021-11-23 13:10:17,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:17,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232415812] [2021-11-23 13:10:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:10:17,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:17,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:17,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 13:10:17,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:10:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:17,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 13:10:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:17,922 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 8 treesize of output 7 [2021-11-23 13:10:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:18,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:20,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:20,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232415812] [2021-11-23 13:10:20,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232415812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:20,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:20,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-23 13:10:20,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67930894] [2021-11-23 13:10:20,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:10:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:10:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:10:20,572 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 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 13:10:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:24,473 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-11-23 13:10:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:10:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 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 23 [2021-11-23 13:10:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:24,475 INFO L225 Difference]: With dead ends: 129 [2021-11-23 13:10:24,475 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 13:10:24,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2021-11-23 13:10:24,477 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 201 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:24,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 86 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 182 Invalid, 0 Unknown, 22 Unchecked, 1.3s Time] [2021-11-23 13:10:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 13:10:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-11-23 13:10:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 93 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 13:10:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-11-23 13:10:24,484 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 23 [2021-11-23 13:10:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:24,485 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-11-23 13:10:24,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 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 13:10:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-11-23 13:10:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 13:10:24,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:24,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:24,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:24,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:24,689 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1553234866, now seen corresponding path program 1 times [2021-11-23 13:10:24,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203901424] [2021-11-23 13:10:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:24,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:24,691 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:24,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 13:10:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:10:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:24,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:25,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203901424] [2021-11-23 13:10:25,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203901424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:25,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:25,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-11-23 13:10:25,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961483023] [2021-11-23 13:10:25,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:10:25,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:10:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:10:25,240 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 13:10:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:26,102 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2021-11-23 13:10:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:10:26,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 26 [2021-11-23 13:10:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:26,104 INFO L225 Difference]: With dead ends: 127 [2021-11-23 13:10:26,104 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 13:10:26,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:10:26,105 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 205 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:26,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 80 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:10:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 13:10:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-11-23 13:10:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 99 states have (on average 1.202020202020202) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:10:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2021-11-23 13:10:26,111 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 26 [2021-11-23 13:10:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:26,111 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2021-11-23 13:10:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 13:10:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2021-11-23 13:10:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 13:10:26,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:26,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:26,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:26,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:26,325 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1795053594, now seen corresponding path program 2 times [2021-11-23 13:10:26,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:26,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862565471] [2021-11-23 13:10:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:10:26,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:26,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:26,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 13:10:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:10:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:10:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:26,421 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 8 treesize of output 7 [2021-11-23 13:10:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:10:26,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:10:27,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862565471] [2021-11-23 13:10:27,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862565471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:27,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:27,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-23 13:10:27,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436047930] [2021-11-23 13:10:27,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:27,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:10:27,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:10:27,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:10:27,775 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 13:10:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:28,011 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-11-23 13:10:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:10:28,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 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 31 [2021-11-23 13:10:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:28,012 INFO L225 Difference]: With dead ends: 122 [2021-11-23 13:10:28,013 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 13:10:28,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:10:28,014 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:28,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 76 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-11-23 13:10:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 13:10:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-11-23 13:10:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 118 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 13:10:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2021-11-23 13:10:28,019 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 31 [2021-11-23 13:10:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:28,019 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2021-11-23 13:10:28,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 13:10:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2021-11-23 13:10:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 13:10:28,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:28,021 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:28,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:28,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:28,233 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash 740071271, now seen corresponding path program 2 times [2021-11-23 13:10:28,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019900053] [2021-11-23 13:10:28,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:10:28,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:28,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:28,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 13:10:28,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:10:28,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:10:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:28,333 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 13 treesize of output 12 [2021-11-23 13:10:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:30,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:31,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019900053] [2021-11-23 13:10:31,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019900053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:31,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:31,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-11-23 13:10:31,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076598117] [2021-11-23 13:10:31,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:31,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:10:31,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:31,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:10:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:10:31,825 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 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 13:10:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:34,700 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2021-11-23 13:10:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:10:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 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 32 [2021-11-23 13:10:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:34,701 INFO L225 Difference]: With dead ends: 143 [2021-11-23 13:10:34,701 INFO L226 Difference]: Without dead ends: 143 [2021-11-23 13:10:34,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-11-23 13:10:34,703 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:34,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 157 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-11-23 13:10:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-23 13:10:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2021-11-23 13:10:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 137 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 13:10:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 172 transitions. [2021-11-23 13:10:34,708 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 172 transitions. Word has length 32 [2021-11-23 13:10:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:34,708 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 172 transitions. [2021-11-23 13:10:34,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 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 13:10:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 172 transitions. [2021-11-23 13:10:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 13:10:34,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:34,710 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:34,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:34,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:34,929 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1154994598, now seen corresponding path program 1 times [2021-11-23 13:10:34,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:34,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951312850] [2021-11-23 13:10:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:34,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:34,931 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:34,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 13:10:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:35,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:10:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:35,041 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 13 treesize of output 12 [2021-11-23 13:10:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:35,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:10:37,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:37,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951312850] [2021-11-23 13:10:37,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951312850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:37,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:37,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-11-23 13:10:37,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129550769] [2021-11-23 13:10:37,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:37,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:10:37,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:10:37,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:10:37,647 INFO L87 Difference]: Start difference. First operand 138 states and 172 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 13:10:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:38,833 INFO L93 Difference]: Finished difference Result 159 states and 197 transitions. [2021-11-23 13:10:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 13:10:38,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 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 33 [2021-11-23 13:10:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:38,839 INFO L225 Difference]: With dead ends: 159 [2021-11-23 13:10:38,839 INFO L226 Difference]: Without dead ends: 159 [2021-11-23 13:10:38,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:10:38,841 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:38,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 100 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2021-11-23 13:10:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-23 13:10:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-11-23 13:10:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 148 states have (on average 1.2702702702702702) internal successors, (188), 150 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 13:10:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 188 transitions. [2021-11-23 13:10:38,846 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 188 transitions. Word has length 33 [2021-11-23 13:10:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:38,847 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 188 transitions. [2021-11-23 13:10:38,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 13:10:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 188 transitions. [2021-11-23 13:10:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 13:10:38,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:38,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:38,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:39,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:39,056 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1467372908, now seen corresponding path program 3 times [2021-11-23 13:10:39,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:39,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201336171] [2021-11-23 13:10:39,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:10:39,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:39,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:39,059 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:39,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 13:10:39,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:10:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:10:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:39,240 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 8 treesize of output 7 [2021-11-23 13:10:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:39,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:40,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201336171] [2021-11-23 13:10:40,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201336171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:40,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:40,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-23 13:10:40,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585802807] [2021-11-23 13:10:40,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:40,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 13:10:40,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 13:10:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-11-23 13:10:40,724 INFO L87 Difference]: Start difference. First operand 151 states and 188 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:41,065 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2021-11-23 13:10:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:10:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 13:10:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:41,068 INFO L225 Difference]: With dead ends: 189 [2021-11-23 13:10:41,068 INFO L226 Difference]: Without dead ends: 187 [2021-11-23 13:10:41,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:10:41,070 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:41,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 193 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-11-23 13:10:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-23 13:10:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2021-11-23 13:10:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 179 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 13:10:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 223 transitions. [2021-11-23 13:10:41,076 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 223 transitions. Word has length 33 [2021-11-23 13:10:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:41,076 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 223 transitions. [2021-11-23 13:10:41,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:10:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 223 transitions. [2021-11-23 13:10:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 13:10:41,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:41,078 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-23 13:10:41,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:10:41,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:10:41,289 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:10:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-23 13:10:41,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:10:41,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128018474] [2021-11-23 13:10:41,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:10:41,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:10:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:10:41,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:10:41,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 13:10:41,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 13:10:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:10:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:10:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:10:41,437 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 8 treesize of output 7 [2021-11-23 13:10:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:42,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:10:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:10:44,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:10:44,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128018474] [2021-11-23 13:10:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128018474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:10:44,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:10:44,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-23 13:10:44,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746269431] [2021-11-23 13:10:44,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:10:44,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 13:10:44,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:10:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 13:10:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-23 13:10:44,656 INFO L87 Difference]: Start difference. First operand 180 states and 223 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:00,734 INFO L93 Difference]: Finished difference Result 1538 states and 1933 transitions. [2021-11-23 13:11:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:11:00,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 13:11:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:00,750 INFO L225 Difference]: With dead ends: 1538 [2021-11-23 13:11:00,750 INFO L226 Difference]: Without dead ends: 1538 [2021-11-23 13:11:00,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=548, Invalid=1258, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 13:11:00,754 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1216 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:00,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 592 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 799 Invalid, 0 Unknown, 30 Unchecked, 5.0s Time] [2021-11-23 13:11:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-11-23 13:11:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 212. [2021-11-23 13:11:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.2583732057416268) internal successors, (263), 211 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 13:11:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2021-11-23 13:11:00,775 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 34 [2021-11-23 13:11:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2021-11-23 13:11:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2021-11-23 13:11:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 13:11:00,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:00,777 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:00,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:00,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:00,990 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1786478211, now seen corresponding path program 1 times [2021-11-23 13:11:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132622724] [2021-11-23 13:11:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:00,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:00,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:00,992 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:00,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 13:11:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:11:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:11:01,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:11:01,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132622724] [2021-11-23 13:11:01,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132622724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:01,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:01,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-11-23 13:11:01,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806287062] [2021-11-23 13:11:01,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:01,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:11:01,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:11:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:11:01,866 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 13:11:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:02,832 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2021-11-23 13:11:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:11:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 35 [2021-11-23 13:11:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:02,835 INFO L225 Difference]: With dead ends: 217 [2021-11-23 13:11:02,836 INFO L226 Difference]: Without dead ends: 201 [2021-11-23 13:11:02,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-11-23 13:11:02,837 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:02,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 117 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:11:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-23 13:11:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-23 13:11:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.2575757575757576) internal successors, (249), 200 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 13:11:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 249 transitions. [2021-11-23 13:11:02,846 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 249 transitions. Word has length 35 [2021-11-23 13:11:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:02,846 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 249 transitions. [2021-11-23 13:11:02,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 13:11:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 249 transitions. [2021-11-23 13:11:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:11:02,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:02,848 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:02,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:03,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:03,049 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 2 times [2021-11-23 13:11:03,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:03,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483722441] [2021-11-23 13:11:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:11:03,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:03,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:03,051 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:03,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 13:11:03,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:11:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:11:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:11:03,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:11:04,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483722441] [2021-11-23 13:11:04,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483722441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:04,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:04,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-11-23 13:11:04,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391213373] [2021-11-23 13:11:04,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:04,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:11:04,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:11:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:11:04,247 INFO L87 Difference]: Start difference. First operand 201 states and 249 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 13:11:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:06,212 INFO L93 Difference]: Finished difference Result 287 states and 348 transitions. [2021-11-23 13:11:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 13:11:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 39 [2021-11-23 13:11:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:06,214 INFO L225 Difference]: With dead ends: 287 [2021-11-23 13:11:06,214 INFO L226 Difference]: Without dead ends: 265 [2021-11-23 13:11:06,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 13:11:06,216 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 325 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:06,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 147 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:11:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-23 13:11:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-11-23 13:11:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.2567567567567568) internal successors, (279), 224 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 13:11:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 279 transitions. [2021-11-23 13:11:06,223 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 279 transitions. Word has length 39 [2021-11-23 13:11:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:06,223 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 279 transitions. [2021-11-23 13:11:06,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 13:11:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 279 transitions. [2021-11-23 13:11:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:11:06,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:06,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:06,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:06,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:06,437 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash 799217830, now seen corresponding path program 4 times [2021-11-23 13:11:06,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:06,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457621702] [2021-11-23 13:11:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:11:06,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:06,438 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:06,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 13:11:06,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:11:06,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 13:11:06,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:06,520 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 8 treesize of output 7 [2021-11-23 13:11:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:07,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:09,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:09,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457621702] [2021-11-23 13:11:09,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457621702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:09,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:09,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-23 13:11:09,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581096682] [2021-11-23 13:11:09,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:09,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:11:09,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:11:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:11:09,930 INFO L87 Difference]: Start difference. First operand 225 states and 279 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 13:11:16,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:11:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:19,371 INFO L93 Difference]: Finished difference Result 372 states and 453 transitions. [2021-11-23 13:11:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:11:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 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 41 [2021-11-23 13:11:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:19,375 INFO L225 Difference]: With dead ends: 372 [2021-11-23 13:11:19,375 INFO L226 Difference]: Without dead ends: 372 [2021-11-23 13:11:19,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 13:11:19,377 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 634 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:19,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 154 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 338 Invalid, 0 Unknown, 96 Unchecked, 4.2s Time] [2021-11-23 13:11:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-23 13:11:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 331. [2021-11-23 13:11:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 328 states have (on average 1.2591463414634145) internal successors, (413), 330 states have internal predecessors, (413), 0 states have call successors, (0), 0 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 13:11:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 413 transitions. [2021-11-23 13:11:19,387 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 413 transitions. Word has length 41 [2021-11-23 13:11:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:19,387 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 413 transitions. [2021-11-23 13:11:19,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 13:11:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 413 transitions. [2021-11-23 13:11:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:11:19,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:19,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:19,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:19,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:19,601 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1388873166, now seen corresponding path program 1 times [2021-11-23 13:11:19,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:19,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720240589] [2021-11-23 13:11:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:19,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:19,602 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:19,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 13:11:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 13:11:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:19,690 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 8 treesize of output 7 [2021-11-23 13:11:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:11:20,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:11:22,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720240589] [2021-11-23 13:11:22,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720240589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:22,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:22,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-11-23 13:11:22,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668467662] [2021-11-23 13:11:22,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:22,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:11:22,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:11:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:11:22,460 INFO L87 Difference]: Start difference. First operand 331 states and 413 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:24,159 INFO L93 Difference]: Finished difference Result 374 states and 463 transitions. [2021-11-23 13:11:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:11:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 13:11:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:24,167 INFO L225 Difference]: With dead ends: 374 [2021-11-23 13:11:24,167 INFO L226 Difference]: Without dead ends: 364 [2021-11-23 13:11:24,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:11:24,168 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 381 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:24,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 103 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 167 Invalid, 0 Unknown, 90 Unchecked, 0.6s Time] [2021-11-23 13:11:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-23 13:11:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 285. [2021-11-23 13:11:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 282 states have (on average 1.2092198581560283) internal successors, (341), 284 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 13:11:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 341 transitions. [2021-11-23 13:11:24,185 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 341 transitions. Word has length 41 [2021-11-23 13:11:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:24,186 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 341 transitions. [2021-11-23 13:11:24,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 341 transitions. [2021-11-23 13:11:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 13:11:24,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:24,187 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:24,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:24,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:24,399 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash -990897512, now seen corresponding path program 3 times [2021-11-23 13:11:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:24,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175522740] [2021-11-23 13:11:24,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:11:24,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:24,402 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:24,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 13:11:24,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:11:24,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:11:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:24,486 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 13 treesize of output 12 [2021-11-23 13:11:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 13:11:25,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 13:11:26,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175522740] [2021-11-23 13:11:26,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175522740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:26,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:26,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-11-23 13:11:26,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835185947] [2021-11-23 13:11:26,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:26,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:11:26,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:11:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:11:26,365 INFO L87 Difference]: Start difference. First operand 285 states and 341 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 13:11:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:27,044 INFO L93 Difference]: Finished difference Result 345 states and 417 transitions. [2021-11-23 13:11:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:11:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 13:11:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:27,047 INFO L225 Difference]: With dead ends: 345 [2021-11-23 13:11:27,047 INFO L226 Difference]: Without dead ends: 345 [2021-11-23 13:11:27,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:11:27,048 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:27,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2021-11-23 13:11:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-23 13:11:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 322. [2021-11-23 13:11:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 319 states have (on average 1.219435736677116) internal successors, (389), 321 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 13:11:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 389 transitions. [2021-11-23 13:11:27,056 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 389 transitions. Word has length 44 [2021-11-23 13:11:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:27,057 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 389 transitions. [2021-11-23 13:11:27,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 13:11:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 389 transitions. [2021-11-23 13:11:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 13:11:27,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:27,058 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:27,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-23 13:11:27,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:27,269 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash -653051813, now seen corresponding path program 3 times [2021-11-23 13:11:27,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:27,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523908784] [2021-11-23 13:11:27,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:11:27,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:27,272 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:27,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 13:11:27,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:11:27,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 13:11:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:27,350 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 8 treesize of output 7 [2021-11-23 13:11:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 13:11:28,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 13:11:30,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:30,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523908784] [2021-11-23 13:11:30,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523908784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:30,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:30,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-11-23 13:11:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93878106] [2021-11-23 13:11:30,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:30,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:11:30,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:30,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:11:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:11:30,757 INFO L87 Difference]: Start difference. First operand 322 states and 389 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:36,553 INFO L93 Difference]: Finished difference Result 410 states and 489 transitions. [2021-11-23 13:11:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:11:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-23 13:11:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:36,557 INFO L225 Difference]: With dead ends: 410 [2021-11-23 13:11:36,557 INFO L226 Difference]: Without dead ends: 410 [2021-11-23 13:11:36,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:11:36,558 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 390 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:36,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 113 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 229 Invalid, 0 Unknown, 23 Unchecked, 1.7s Time] [2021-11-23 13:11:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-23 13:11:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 403. [2021-11-23 13:11:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 400 states have (on average 1.2075) internal successors, (483), 402 states have internal predecessors, (483), 0 states have call successors, (0), 0 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 13:11:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 483 transitions. [2021-11-23 13:11:36,568 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 483 transitions. Word has length 45 [2021-11-23 13:11:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:36,569 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 483 transitions. [2021-11-23 13:11:36,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 483 transitions. [2021-11-23 13:11:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:11:36,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:36,570 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:36,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:36,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:36,786 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1128392693, now seen corresponding path program 2 times [2021-11-23 13:11:36,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:36,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822074267] [2021-11-23 13:11:36,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:11:36,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:36,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:36,788 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:36,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 13:11:36,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:11:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 13:11:36,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:36,880 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 8 treesize of output 7 [2021-11-23 13:11:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:11:37,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:41,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:41,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822074267] [2021-11-23 13:11:41,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822074267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:41,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:41,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-23 13:11:41,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770642894] [2021-11-23 13:11:41,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:41,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:11:41,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:11:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:11:41,333 INFO L87 Difference]: Start difference. First operand 403 states and 483 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 13:11:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:43,740 INFO L93 Difference]: Finished difference Result 426 states and 506 transitions. [2021-11-23 13:11:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:11:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 13:11:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:43,743 INFO L225 Difference]: With dead ends: 426 [2021-11-23 13:11:43,744 INFO L226 Difference]: Without dead ends: 407 [2021-11-23 13:11:43,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-11-23 13:11:43,745 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:43,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 252 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 262 Invalid, 0 Unknown, 74 Unchecked, 1.6s Time] [2021-11-23 13:11:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-23 13:11:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 391. [2021-11-23 13:11:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 388 states have (on average 1.2061855670103092) internal successors, (468), 390 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 468 transitions. [2021-11-23 13:11:43,770 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 468 transitions. Word has length 47 [2021-11-23 13:11:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:43,770 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 468 transitions. [2021-11-23 13:11:43,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 13:11:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 468 transitions. [2021-11-23 13:11:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 13:11:43,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:43,772 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:43,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:43,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:43,984 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash -263973151, now seen corresponding path program 1 times [2021-11-23 13:11:43,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:43,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425540418] [2021-11-23 13:11:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:43,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:43,986 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 13:11:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:11:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:11:44,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:11:45,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:45,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425540418] [2021-11-23 13:11:45,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425540418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:45,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:45,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-11-23 13:11:45,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921015935] [2021-11-23 13:11:45,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:45,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:11:45,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:11:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:11:45,691 INFO L87 Difference]: Start difference. First operand 391 states and 468 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:47,139 INFO L93 Difference]: Finished difference Result 412 states and 488 transitions. [2021-11-23 13:11:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:11:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 13:11:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:47,142 INFO L225 Difference]: With dead ends: 412 [2021-11-23 13:11:47,142 INFO L226 Difference]: Without dead ends: 385 [2021-11-23 13:11:47,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 13:11:47,143 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 259 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:47,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 161 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:11:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-23 13:11:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-23 13:11:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 382 states have (on average 1.206806282722513) internal successors, (461), 384 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 13:11:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 461 transitions. [2021-11-23 13:11:47,153 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 461 transitions. Word has length 50 [2021-11-23 13:11:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:47,153 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 461 transitions. [2021-11-23 13:11:47,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:11:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 461 transitions. [2021-11-23 13:11:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 13:11:47,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:47,166 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:47,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:47,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:47,369 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1579950574, now seen corresponding path program 3 times [2021-11-23 13:11:47,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102224274] [2021-11-23 13:11:47,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:11:47,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:47,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:47,371 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:47,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 13:11:47,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:11:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:11:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:47,482 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 13 treesize of output 12 [2021-11-23 13:11:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 13:11:48,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 13:11:51,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102224274] [2021-11-23 13:11:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102224274] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:11:51,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:11:51,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2021-11-23 13:11:51,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324417438] [2021-11-23 13:11:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:51,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:11:51,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:11:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:11:51,486 INFO L87 Difference]: Start difference. First operand 385 states and 461 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 13:11:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:51,847 INFO L93 Difference]: Finished difference Result 394 states and 469 transitions. [2021-11-23 13:11:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:11:51,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 13:11:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:51,849 INFO L225 Difference]: With dead ends: 394 [2021-11-23 13:11:51,849 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 13:11:51,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:11:51,850 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:51,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-11-23 13:11:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 13:11:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 357. [2021-11-23 13:11:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 354 states have (on average 1.192090395480226) internal successors, (422), 356 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 13:11:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 422 transitions. [2021-11-23 13:11:51,859 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 422 transitions. Word has length 51 [2021-11-23 13:11:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:51,860 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 422 transitions. [2021-11-23 13:11:51,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 13:11:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 422 transitions. [2021-11-23 13:11:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 13:11:51,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:51,861 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:51,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:52,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:11:52,083 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:11:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash 737382308, now seen corresponding path program 2 times [2021-11-23 13:11:52,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:11:52,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678156077] [2021-11-23 13:11:52,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:11:52,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:11:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:11:52,085 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:11:52,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 13:11:52,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:11:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:52,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 13:11:52,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:52,198 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 8 treesize of output 7 [2021-11-23 13:11:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:53,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:11:56,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:11:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678156077] [2021-11-23 13:11:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678156077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:56,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:56,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-11-23 13:11:56,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511170377] [2021-11-23 13:11:56,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:56,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:11:56,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:11:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:11:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:11:56,453 INFO L87 Difference]: Start difference. First operand 357 states and 422 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:12:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:05,941 INFO L93 Difference]: Finished difference Result 481 states and 559 transitions. [2021-11-23 13:12:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 13:12:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 13:12:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:05,944 INFO L225 Difference]: With dead ends: 481 [2021-11-23 13:12:05,944 INFO L226 Difference]: Without dead ends: 481 [2021-11-23 13:12:05,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=723, Invalid=2247, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 13:12:05,946 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 516 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:05,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 264 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 435 Invalid, 0 Unknown, 51 Unchecked, 2.3s Time] [2021-11-23 13:12:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-23 13:12:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 249. [2021-11-23 13:12:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.1497975708502024) internal successors, (284), 248 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 13:12:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 284 transitions. [2021-11-23 13:12:05,954 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 284 transitions. Word has length 54 [2021-11-23 13:12:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:05,955 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 284 transitions. [2021-11-23 13:12:05,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:12:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 284 transitions. [2021-11-23 13:12:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 13:12:05,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:05,956 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:05,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:06,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:06,170 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:12:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 509031846, now seen corresponding path program 5 times [2021-11-23 13:12:06,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:06,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051957277] [2021-11-23 13:12:06,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:12:06,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:06,172 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:06,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 13:12:06,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 13:12:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:12:06,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 13:12:06,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:06,571 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 8 treesize of output 7 [2021-11-23 13:12:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:07,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:13,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:13,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051957277] [2021-11-23 13:12:13,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051957277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:13,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:12:13,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-11-23 13:12:13,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383559397] [2021-11-23 13:12:13,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:13,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 13:12:13,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 13:12:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 13:12:13,680 INFO L87 Difference]: Start difference. First operand 249 states and 284 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 13:12:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:16,482 INFO L93 Difference]: Finished difference Result 334 states and 384 transitions. [2021-11-23 13:12:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:12:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 13:12:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:16,485 INFO L225 Difference]: With dead ends: 334 [2021-11-23 13:12:16,486 INFO L226 Difference]: Without dead ends: 332 [2021-11-23 13:12:16,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:12:16,487 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:16,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 408 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 277 Invalid, 0 Unknown, 71 Unchecked, 1.5s Time] [2021-11-23 13:12:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-23 13:12:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 303. [2021-11-23 13:12:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.169435215946844) internal successors, (352), 302 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 13:12:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 352 transitions. [2021-11-23 13:12:16,492 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 352 transitions. Word has length 61 [2021-11-23 13:12:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:16,492 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 352 transitions. [2021-11-23 13:12:16,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 13:12:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 352 transitions. [2021-11-23 13:12:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:12:16,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:16,493 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:16,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:16,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:16,694 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:12:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1008871624, now seen corresponding path program 4 times [2021-11-23 13:12:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742012326] [2021-11-23 13:12:16,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:12:16,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:16,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:16,695 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:16,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 13:12:16,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:12:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:12:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:12:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 76 proven. 50 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 13:12:17,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 83 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 13:12:18,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742012326] [2021-11-23 13:12:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742012326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:18,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:12:18,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-23 13:12:18,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409796153] [2021-11-23 13:12:18,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:18,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:12:18,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:12:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:12:18,424 INFO L87 Difference]: Start difference. First operand 303 states and 352 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:12:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:22,071 INFO L93 Difference]: Finished difference Result 330 states and 378 transitions. [2021-11-23 13:12:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:12:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:12:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:22,074 INFO L225 Difference]: With dead ends: 330 [2021-11-23 13:12:22,074 INFO L226 Difference]: Without dead ends: 278 [2021-11-23 13:12:22,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=535, Invalid=2015, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 13:12:22,075 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 520 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:22,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 254 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 13:12:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-23 13:12:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2021-11-23 13:12:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 274 states have (on average 1.167883211678832) internal successors, (320), 275 states have internal predecessors, (320), 0 states have call successors, (0), 0 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 13:12:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2021-11-23 13:12:22,086 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 64 [2021-11-23 13:12:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:22,086 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2021-11-23 13:12:22,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:12:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2021-11-23 13:12:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:12:22,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:22,088 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-23 13:12:22,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:22,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:12:22,301 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:12:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-23 13:12:22,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:12:22,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165758493] [2021-11-23 13:12:22,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:12:22,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:12:22,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:12:22,303 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:12:22,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 13:12:22,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:12:22,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:12:22,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:12:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:22,406 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 8 treesize of output 7 [2021-11-23 13:12:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:24,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:36,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:12:36,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165758493] [2021-11-23 13:12:36,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165758493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:36,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:12:36,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-23 13:12:36,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210523799] [2021-11-23 13:12:36,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:36,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:12:36,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:12:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:12:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:12:36,535 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:12:54,218 WARN L227 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:12:56,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:12:58,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:13:00,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:13:16,416 WARN L227 SmtUtils]: Spent 14.36s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:13:39,663 WARN L227 SmtUtils]: Spent 22.37s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:13:42,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:13:44,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:13:46,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:13:48,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:13:58,689 WARN L227 SmtUtils]: Spent 9.27s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:14:17,057 WARN L227 SmtUtils]: Spent 17.30s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:14:20,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:14:22,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:14:24,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:14:34,894 WARN L227 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:14:49,398 WARN L227 SmtUtils]: Spent 13.27s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:14:52,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:14:54,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:14:56,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:02,984 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:15:15,581 WARN L227 SmtUtils]: Spent 11.13s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:15:18,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:20,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:22,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:37,711 WARN L227 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:15:40,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:42,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:44,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:15:55,618 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:15:58,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:00,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:02,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:13,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:15,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:25,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:27,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:16:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:49,499 INFO L93 Difference]: Finished difference Result 4470 states and 5066 transitions. [2021-11-23 13:16:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-23 13:16:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 13:16:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:49,518 INFO L225 Difference]: With dead ends: 4470 [2021-11-23 13:16:49,518 INFO L226 Difference]: Without dead ends: 4470 [2021-11-23 13:16:49,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 191.6s TimeCoverageRelationStatistics Valid=2223, Invalid=5259, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 13:16:49,520 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 4136 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 2933 mSolverCounterSat, 173 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4136 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2933 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 70.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:49,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4136 Valid, 2333 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2933 Invalid, 26 Unknown, 32 Unchecked, 70.1s Time] [2021-11-23 13:16:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4470 states. [2021-11-23 13:16:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 340. [2021-11-23 13:16:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.183431952662722) internal successors, (400), 339 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 13:16:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 400 transitions. [2021-11-23 13:16:49,549 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 400 transitions. Word has length 66 [2021-11-23 13:16:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:49,549 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 400 transitions. [2021-11-23 13:16:49,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:16:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 400 transitions. [2021-11-23 13:16:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:16:49,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:16:49,551 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:49,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-23 13:16:49,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:16:49,765 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:16:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:16:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1463771587, now seen corresponding path program 1 times [2021-11-23 13:16:49,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:16:49,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618984704] [2021-11-23 13:16:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:16:49,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:16:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:16:49,767 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:16:49,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 13:16:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:16:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 13:16:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:16:49,903 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 8 treesize of output 7 [2021-11-23 13:16:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:16:51,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:16:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:16:58,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:16:58,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618984704] [2021-11-23 13:16:58,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618984704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:16:58,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:16:58,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-11-23 13:16:58,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362707679] [2021-11-23 13:16:58,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:16:58,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 13:16:58,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:16:58,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 13:16:58,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 13:16:58,013 INFO L87 Difference]: Start difference. First operand 340 states and 400 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 13:17:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:17:03,652 INFO L93 Difference]: Finished difference Result 498 states and 587 transitions. [2021-11-23 13:17:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 13:17:03,654 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:17:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:17:03,656 INFO L225 Difference]: With dead ends: 498 [2021-11-23 13:17:03,656 INFO L226 Difference]: Without dead ends: 494 [2021-11-23 13:17:03,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 13:17:03,657 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:17:03,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 537 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 482 Invalid, 0 Unknown, 62 Unchecked, 3.8s Time] [2021-11-23 13:17:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-23 13:17:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 417. [2021-11-23 13:17:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.1951807228915663) internal successors, (496), 416 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 13:17:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 496 transitions. [2021-11-23 13:17:03,665 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 496 transitions. Word has length 67 [2021-11-23 13:17:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:17:03,666 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 496 transitions. [2021-11-23 13:17:03,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 13:17:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 496 transitions. [2021-11-23 13:17:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:17:03,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:17:03,667 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:17:03,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 13:17:03,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:17:03,881 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:17:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:17:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash 81905071, now seen corresponding path program 2 times [2021-11-23 13:17:03,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:17:03,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390829019] [2021-11-23 13:17:03,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:17:03,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:17:03,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:17:03,882 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:17:03,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 13:17:03,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:17:03,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:17:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 13:17:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:17:04,010 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 8 treesize of output 7 [2021-11-23 13:17:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:17:05,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:17:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:17:13,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:17:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390829019] [2021-11-23 13:17:13,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390829019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:17:13,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:17:13,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-11-23 13:17:13,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905656156] [2021-11-23 13:17:13,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:17:13,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 13:17:13,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:17:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 13:17:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 13:17:13,395 INFO L87 Difference]: Start difference. First operand 417 states and 496 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 13:17:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:17:22,347 INFO L93 Difference]: Finished difference Result 707 states and 847 transitions. [2021-11-23 13:17:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 13:17:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:17:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:17:22,352 INFO L225 Difference]: With dead ends: 707 [2021-11-23 13:17:22,352 INFO L226 Difference]: Without dead ends: 706 [2021-11-23 13:17:22,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:17:22,354 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:17:22,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 483 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 651 Invalid, 0 Unknown, 165 Unchecked, 5.4s Time] [2021-11-23 13:17:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-11-23 13:17:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 545. [2021-11-23 13:17:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 543 states have (on average 1.2025782688766113) internal successors, (653), 544 states have internal predecessors, (653), 0 states have call successors, (0), 0 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 13:17:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 653 transitions. [2021-11-23 13:17:22,366 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 653 transitions. Word has length 67 [2021-11-23 13:17:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:17:22,366 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 653 transitions. [2021-11-23 13:17:22,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 13:17:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 653 transitions. [2021-11-23 13:17:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:17:22,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:17:22,369 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:17:22,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-23 13:17:22,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:17:22,582 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:17:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:17:22,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1371422461, now seen corresponding path program 3 times [2021-11-23 13:17:22,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:17:22,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063392621] [2021-11-23 13:17:22,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:17:22,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:17:22,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:17:22,584 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:17:22,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 13:17:22,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 13:17:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:17:22,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:17:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:17:22,897 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 8 treesize of output 7 [2021-11-23 13:17:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 71 proven. 62 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 13:17:26,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:18:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 13:18:05,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:18:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063392621] [2021-11-23 13:18:05,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063392621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:18:05,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:18:05,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-11-23 13:18:05,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481294109] [2021-11-23 13:18:05,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:18:05,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 13:18:05,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:18:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 13:18:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=924, Unknown=5, NotChecked=0, Total=1056 [2021-11-23 13:18:05,427 INFO L87 Difference]: Start difference. First operand 545 states and 653 transitions. Second operand has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 13:18:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:18:19,604 INFO L93 Difference]: Finished difference Result 664 states and 793 transitions. [2021-11-23 13:18:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:18:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:18:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:18:19,608 INFO L225 Difference]: With dead ends: 664 [2021-11-23 13:18:19,608 INFO L226 Difference]: Without dead ends: 654 [2021-11-23 13:18:19,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 106 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=427, Invalid=2220, Unknown=5, NotChecked=0, Total=2652 [2021-11-23 13:18:19,609 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 240 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:18:19,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 321 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 273 Invalid, 0 Unknown, 441 Unchecked, 2.2s Time] [2021-11-23 13:18:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-23 13:18:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 546. [2021-11-23 13:18:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 544 states have (on average 1.2003676470588236) internal successors, (653), 545 states have internal predecessors, (653), 0 states have call successors, (0), 0 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 13:18:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 653 transitions. [2021-11-23 13:18:19,620 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 653 transitions. Word has length 67 [2021-11-23 13:18:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:18:19,620 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 653 transitions. [2021-11-23 13:18:19,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 13:18:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 653 transitions. [2021-11-23 13:18:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 13:18:19,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:18:19,622 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:18:19,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 13:18:19,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:18:19,836 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:18:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:18:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash -273652577, now seen corresponding path program 5 times [2021-11-23 13:18:19,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:18:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258190968] [2021-11-23 13:18:19,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:18:19,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:18:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:18:19,838 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:18:19,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 13:18:20,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 13:18:20,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:18:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:18:20,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:18:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:18:21,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:18:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:18:23,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:18:23,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258190968] [2021-11-23 13:18:23,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258190968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:18:23,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:18:23,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-23 13:18:23,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944663868] [2021-11-23 13:18:23,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:18:23,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:18:23,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:18:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:18:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:18:23,407 INFO L87 Difference]: Start difference. First operand 546 states and 653 transitions. Second operand has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 13:18:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:18:27,044 INFO L93 Difference]: Finished difference Result 613 states and 713 transitions. [2021-11-23 13:18:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:18:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 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 13:18:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:18:27,048 INFO L225 Difference]: With dead ends: 613 [2021-11-23 13:18:27,048 INFO L226 Difference]: Without dead ends: 551 [2021-11-23 13:18:27,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-11-23 13:18:27,049 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 217 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:18:27,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 580 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 13:18:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-23 13:18:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 534. [2021-11-23 13:18:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 532 states have (on average 1.1748120300751879) internal successors, (625), 533 states have internal predecessors, (625), 0 states have call successors, (0), 0 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 13:18:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 625 transitions. [2021-11-23 13:18:27,059 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 625 transitions. Word has length 68 [2021-11-23 13:18:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:18:27,059 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 625 transitions. [2021-11-23 13:18:27,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 13:18:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 625 transitions. [2021-11-23 13:18:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 13:18:27,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:18:27,061 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:18:27,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 13:18:27,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:18:27,278 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:18:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:18:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash -608240947, now seen corresponding path program 6 times [2021-11-23 13:18:27,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:18:27,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666734017] [2021-11-23 13:18:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:18:27,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:18:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:18:27,280 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:18:27,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 13:18:27,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 13:18:27,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:18:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:18:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:18:27,680 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 8 treesize of output 7 [2021-11-23 13:18:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:18:30,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:18:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:18:41,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:18:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666734017] [2021-11-23 13:18:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666734017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:18:41,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:18:41,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2021-11-23 13:18:41,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863904154] [2021-11-23 13:18:41,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:18:41,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 13:18:41,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:18:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 13:18:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:18:41,030 INFO L87 Difference]: Start difference. First operand 534 states and 625 transitions. Second operand has 31 states, 30 states have (on average 3.533333333333333) internal successors, (106), 31 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 13:18:51,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:19:05,302 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 125 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:19:07,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:20:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:20:07,217 INFO L93 Difference]: Finished difference Result 1027 states and 1214 transitions. [2021-11-23 13:20:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-23 13:20:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.533333333333333) internal successors, (106), 31 states have internal predecessors, (106), 0 states have call successors, (0), 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 70 [2021-11-23 13:20:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:20:07,223 INFO L225 Difference]: With dead ends: 1027 [2021-11-23 13:20:07,223 INFO L226 Difference]: Without dead ends: 1007 [2021-11-23 13:20:07,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=2601, Invalid=8319, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 13:20:07,226 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1029 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 132 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:20:07,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 642 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1423 Invalid, 2 Unknown, 152 Unchecked, 20.2s Time] [2021-11-23 13:20:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-11-23 13:20:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 896. [2021-11-23 13:20:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 894 states have (on average 1.2024608501118568) internal successors, (1075), 895 states have internal predecessors, (1075), 0 states have call successors, (0), 0 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 13:20:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1075 transitions. [2021-11-23 13:20:07,241 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1075 transitions. Word has length 70 [2021-11-23 13:20:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:20:07,241 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1075 transitions. [2021-11-23 13:20:07,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.533333333333333) internal successors, (106), 31 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 13:20:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1075 transitions. [2021-11-23 13:20:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 13:20:07,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:20:07,243 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:20:07,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 13:20:07,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:20:07,458 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:20:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:20:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1428738709, now seen corresponding path program 6 times [2021-11-23 13:20:07,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:20:07,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66723028] [2021-11-23 13:20:07,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:20:07,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:20:07,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:20:07,460 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:20:07,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 13:20:07,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-23 13:20:07,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:20:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 13:20:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:20:07,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 13:20:10,405 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 19 treesize of output 15 [2021-11-23 13:20:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 98 proven. 87 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 13:20:10,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:20:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 95 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 13:20:16,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:20:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66723028] [2021-11-23 13:20:16,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66723028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:20:16,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:20:16,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-11-23 13:20:16,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236790070] [2021-11-23 13:20:16,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:20:16,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 13:20:16,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:20:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 13:20:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 13:20:16,217 INFO L87 Difference]: Start difference. First operand 896 states and 1075 transitions. Second operand has 34 states, 34 states have (on average 3.235294117647059) internal successors, (110), 34 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:20:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:20:25,769 INFO L93 Difference]: Finished difference Result 658 states and 755 transitions. [2021-11-23 13:20:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:20:25,772 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.235294117647059) internal successors, (110), 34 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 13:20:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:20:25,774 INFO L225 Difference]: With dead ends: 658 [2021-11-23 13:20:25,774 INFO L226 Difference]: Without dead ends: 529 [2021-11-23 13:20:25,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=639, Invalid=2783, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 13:20:25,775 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1050 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:20:25,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 600 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 13:20:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-23 13:20:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-23 13:20:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 527 states have (on average 1.1707779886148009) internal successors, (617), 528 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 13:20:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 617 transitions. [2021-11-23 13:20:25,786 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 617 transitions. Word has length 73 [2021-11-23 13:20:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:20:25,787 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 617 transitions. [2021-11-23 13:20:25,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.235294117647059) internal successors, (110), 34 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:20:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 617 transitions. [2021-11-23 13:20:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 13:20:25,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:20:25,788 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:20:25,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 13:20:26,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:20:26,003 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:20:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:20:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 348270194, now seen corresponding path program 7 times [2021-11-23 13:20:26,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:20:26,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912751210] [2021-11-23 13:20:26,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:20:26,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:20:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:20:26,006 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:20:26,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 13:20:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:20:26,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:20:26,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:20:26,184 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 8 treesize of output 7 [2021-11-23 13:20:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:20:29,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:20:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 1 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:20:36,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:20:36,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912751210] [2021-11-23 13:20:36,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912751210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:20:36,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:20:36,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-11-23 13:20:36,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583523561] [2021-11-23 13:20:36,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:20:36,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 13:20:36,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:20:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 13:20:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:20:36,168 INFO L87 Difference]: Start difference. First operand 529 states and 617 transitions. Second operand has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 13:21:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:21:06,419 INFO L93 Difference]: Finished difference Result 797 states and 917 transitions. [2021-11-23 13:21:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 13:21:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 13:21:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:21:06,426 INFO L225 Difference]: With dead ends: 797 [2021-11-23 13:21:06,426 INFO L226 Difference]: Without dead ends: 797 [2021-11-23 13:21:06,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 13:21:06,427 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 879 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:21:06,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 593 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1063 Invalid, 0 Unknown, 237 Unchecked, 9.7s Time] [2021-11-23 13:21:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-11-23 13:21:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 697. [2021-11-23 13:21:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 695 states have (on average 1.176978417266187) internal successors, (818), 696 states have internal predecessors, (818), 0 states have call successors, (0), 0 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 13:21:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 818 transitions. [2021-11-23 13:21:06,441 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 818 transitions. Word has length 77 [2021-11-23 13:21:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:21:06,442 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 818 transitions. [2021-11-23 13:21:06,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 13:21:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 818 transitions. [2021-11-23 13:21:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 13:21:06,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:21:06,443 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:21:06,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 13:21:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:21:06,660 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:21:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:21:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -198049911, now seen corresponding path program 2 times [2021-11-23 13:21:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:21:06,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403606677] [2021-11-23 13:21:06,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:21:06,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:21:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:21:06,663 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:21:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 13:21:06,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:21:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:21:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:21:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:21:06,860 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 8 treesize of output 7 [2021-11-23 13:21:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:21:10,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:21:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 1 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:21:17,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:21:17,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403606677] [2021-11-23 13:21:17,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403606677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:21:17,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:21:17,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-11-23 13:21:17,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853028784] [2021-11-23 13:21:17,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:21:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 13:21:17,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:21:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 13:21:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:21:17,837 INFO L87 Difference]: Start difference. First operand 697 states and 818 transitions. Second operand has 33 states, 32 states have (on average 3.875) internal successors, (124), 33 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 13:21:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:21:36,223 INFO L93 Difference]: Finished difference Result 969 states and 1145 transitions. [2021-11-23 13:21:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 13:21:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.875) internal successors, (124), 33 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 83 [2021-11-23 13:21:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:21:36,229 INFO L225 Difference]: With dead ends: 969 [2021-11-23 13:21:36,229 INFO L226 Difference]: Without dead ends: 969 [2021-11-23 13:21:36,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 13:21:36,230 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 753 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:21:36,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 479 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 654 Invalid, 0 Unknown, 146 Unchecked, 3.6s Time] [2021-11-23 13:21:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-23 13:21:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 883. [2021-11-23 13:21:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.2054483541430192) internal successors, (1062), 882 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 13:21:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1062 transitions. [2021-11-23 13:21:36,246 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1062 transitions. Word has length 83 [2021-11-23 13:21:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:21:36,246 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1062 transitions. [2021-11-23 13:21:36,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.875) internal successors, (124), 33 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 13:21:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1062 transitions. [2021-11-23 13:21:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 13:21:36,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:21:36,248 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:21:36,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 13:21:36,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:21:36,456 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:21:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:21:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1251486725, now seen corresponding path program 3 times [2021-11-23 13:21:36,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:21:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18384094] [2021-11-23 13:21:36,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:21:36,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:21:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:21:36,458 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:21:36,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 13:21:36,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:21:36,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:21:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:21:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:21:36,703 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 8 treesize of output 7 [2021-11-23 13:21:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 13:21:39,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:21:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 1 proven. 118 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 13:21:51,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:21:51,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18384094] [2021-11-23 13:21:51,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18384094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:21:51,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:21:51,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-11-23 13:21:51,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920319868] [2021-11-23 13:21:51,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:21:51,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 13:21:51,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:21:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 13:21:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:21:51,907 INFO L87 Difference]: Start difference. First operand 883 states and 1062 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:19,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:22:21,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:22:36,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 13:22:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:22:47,665 INFO L93 Difference]: Finished difference Result 1010 states and 1197 transitions. [2021-11-23 13:22:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 13:22:47,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-23 13:22:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:22:47,672 INFO L225 Difference]: With dead ends: 1010 [2021-11-23 13:22:47,672 INFO L226 Difference]: Without dead ends: 1010 [2021-11-23 13:22:47,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=1288, Invalid=4114, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 13:22:47,673 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 822 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 84 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:22:47,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 222 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 496 Invalid, 2 Unknown, 46 Unchecked, 13.1s Time] [2021-11-23 13:22:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-11-23 13:22:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 562. [2021-11-23 13:22:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 560 states have (on average 1.1607142857142858) internal successors, (650), 561 states have internal predecessors, (650), 0 states have call successors, (0), 0 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 13:22:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 650 transitions. [2021-11-23 13:22:47,683 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 650 transitions. Word has length 83 [2021-11-23 13:22:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:22:47,683 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 650 transitions. [2021-11-23 13:22:47,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:22:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 650 transitions. [2021-11-23 13:22:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:22:47,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:22:47,685 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:22:47,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 13:22:47,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:22:47,902 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:22:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:22:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash 98760736, now seen corresponding path program 8 times [2021-11-23 13:22:47,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:22:47,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947626292] [2021-11-23 13:22:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:22:47,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:22:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:22:47,904 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:22:47,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 13:22:48,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:22:48,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:22:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:22:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:22:48,175 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 8 treesize of output 7 [2021-11-23 13:22:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 55 proven. 246 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-23 13:22:52,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:23:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 112 proven. 189 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-23 13:23:00,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:23:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947626292] [2021-11-23 13:23:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947626292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:23:00,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:23:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-11-23 13:23:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695297456] [2021-11-23 13:23:00,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:23:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 13:23:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:23:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 13:23:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:23:00,519 INFO L87 Difference]: Start difference. First operand 562 states and 650 transitions. Second operand has 31 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:23:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:23:26,135 INFO L93 Difference]: Finished difference Result 1329 states and 1599 transitions. [2021-11-23 13:23:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 13:23:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:23:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:23:26,144 INFO L225 Difference]: With dead ends: 1329 [2021-11-23 13:23:26,144 INFO L226 Difference]: Without dead ends: 1321 [2021-11-23 13:23:26,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 188 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=1240, Invalid=4612, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 13:23:26,145 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 789 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:23:26,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 414 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 560 Invalid, 0 Unknown, 169 Unchecked, 3.3s Time] [2021-11-23 13:23:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-11-23 13:23:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1178. [2021-11-23 13:23:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1176 states have (on average 1.215986394557823) internal successors, (1430), 1177 states have internal predecessors, (1430), 0 states have call successors, (0), 0 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 13:23:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1430 transitions. [2021-11-23 13:23:26,162 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1430 transitions. Word has length 95 [2021-11-23 13:23:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:23:26,162 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1430 transitions. [2021-11-23 13:23:26,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:23:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1430 transitions. [2021-11-23 13:23:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 13:23:26,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:23:26,165 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:23:26,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 13:23:26,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:23:26,373 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 13:23:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:23:26,374 INFO L85 PathProgramCache]: Analyzing trace with hash -738366094, now seen corresponding path program 9 times [2021-11-23 13:23:26,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:23:26,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345613197] [2021-11-23 13:23:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:23:26,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:23:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:23:26,375 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:23:26,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6470e8-7b31-4eb5-9199-127e6aa0c663/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 13:23:27,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 13:23:27,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:23:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 13:23:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:23:27,589 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 8 treesize of output 7 [2021-11-23 13:23:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 12 proven. 368 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:23:32,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:23:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 13 proven. 367 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:23:38,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:23:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345613197] [2021-11-23 13:23:38,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345613197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:23:38,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:23:38,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2021-11-23 13:23:38,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122941114] [2021-11-23 13:23:38,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:23:38,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 13:23:38,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:23:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 13:23:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:23:38,499 INFO L87 Difference]: Start difference. First operand 1178 states and 1430 transitions. Second operand has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 39 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)