./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/s3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22366af6514966a73d28a63d2bc4f38bf02b60e4 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22366af6514966a73d28a63d2bc4f38bf02b60e4 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:29,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:29,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:29,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:29,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:29,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:29,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:29,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:29,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:29,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:29,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:29,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:29,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:29,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:29,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:29,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:29,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:29,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:29,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:29,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:29,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:29,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:29,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:29,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:29,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:29,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:29,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:29,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:29,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:29,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:29,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:29,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:29,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:29,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:29,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:29,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:29,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:29,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:29,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:29,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:29,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:29,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-12 23:59:29,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:29,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:29,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:29,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:29,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:29,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:29,567 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:29,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:29,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:29,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:29,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:29,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:29,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:29,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:29,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:29,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:29,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:29,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:29,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:29,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:29,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:29,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:29,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:29,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:29,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:29,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:29,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:29,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:29,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:29,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:29,572 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_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22366af6514966a73d28a63d2bc4f38bf02b60e4 [2021-10-12 23:59:29,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:29,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:29,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:29,861 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:29,861 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:29,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loops/s3.i [2021-10-12 23:59:29,925 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/603f6842c/56463e2953e94002be3e166a4e4c47a3/FLAGed39aa050 [2021-10-12 23:59:30,574 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:30,577 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/sv-benchmarks/c/loops/s3.i [2021-10-12 23:59:30,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/603f6842c/56463e2953e94002be3e166a4e4c47a3/FLAGed39aa050 [2021-10-12 23:59:30,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/603f6842c/56463e2953e94002be3e166a4e4c47a3 [2021-10-12 23:59:30,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:30,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:30,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:30,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:30,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:30,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:30" (1/1) ... [2021-10-12 23:59:30,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418802be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:30, skipping insertion in model container [2021-10-12 23:59:30,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:30" (1/1) ... [2021-10-12 23:59:30,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:30,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:31,314 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-12 23:59:31,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:31,337 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:31,485 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-12 23:59:31,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:31,529 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:31,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31 WrapperNode [2021-10-12 23:59:31,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:31,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:31,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:31,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:31,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:31,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:31,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:31,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:31,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:31,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:31,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:31,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:31,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (1/1) ... [2021-10-12 23:59:31,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:31,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:31,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:31,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-12 23:59:31,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:31,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-12 23:59:31,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-12 23:59:31,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-12 23:59:31,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:31,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-12 23:59:31,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:31,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:32,180 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-12 23:59:35,117 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-12 23:59:35,118 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-12 23:59:35,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:35,126 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-12 23:59:35,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:35 BoogieIcfgContainer [2021-10-12 23:59:35,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:35,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:35,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:35,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:35,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:30" (1/3) ... [2021-10-12 23:59:35,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aee2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:35, skipping insertion in model container [2021-10-12 23:59:35,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:31" (2/3) ... [2021-10-12 23:59:35,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aee2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:35, skipping insertion in model container [2021-10-12 23:59:35,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:35" (3/3) ... [2021-10-12 23:59:35,138 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-12 23:59:35,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:35,143 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-12 23:59:35,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:35,199 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-12 23:59:35,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-12 23:59:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-12 23:59:35,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:35,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:35,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-12 23:59:35,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:35,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598836177] [2021-10-12 23:59:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:35,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:35,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:35,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598836177] [2021-10-12 23:59:35,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598836177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:35,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:35,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:35,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874548985] [2021-10-12 23:59:35,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-12 23:59:35,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-12 23:59:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-12 23:59:35,638 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 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, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:35,785 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-12 23:59:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-12 23:59:35,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 24 [2021-10-12 23:59:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:35,806 INFO L225 Difference]: With dead ends: 375 [2021-10-12 23:59:35,806 INFO L226 Difference]: Without dead ends: 217 [2021-10-12 23:59:35,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-12 23:59:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-12 23:59:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-12 23:59:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 321 transitions. [2021-10-12 23:59:35,888 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 321 transitions. Word has length 24 [2021-10-12 23:59:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:35,889 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 321 transitions. [2021-10-12 23:59:35,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 321 transitions. [2021-10-12 23:59:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-12 23:59:35,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:35,894 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:35,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:35,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:35,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash 546953675, now seen corresponding path program 1 times [2021-10-12 23:59:35,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:35,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936084256] [2021-10-12 23:59:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:35,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:36,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:36,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936084256] [2021-10-12 23:59:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936084256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:36,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:36,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:36,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430922785] [2021-10-12 23:59:36,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:36,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:36,117 INFO L87 Difference]: Start difference. First operand 217 states and 321 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:40,476 INFO L93 Difference]: Finished difference Result 359 states and 534 transitions. [2021-10-12 23:59:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:40,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-12 23:59:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:40,479 INFO L225 Difference]: With dead ends: 359 [2021-10-12 23:59:40,479 INFO L226 Difference]: Without dead ends: 252 [2021-10-12 23:59:40,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-12 23:59:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 235. [2021-10-12 23:59:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5) internal successors, (351), 234 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 351 transitions. [2021-10-12 23:59:40,497 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 351 transitions. Word has length 39 [2021-10-12 23:59:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:40,498 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 351 transitions. [2021-10-12 23:59:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 351 transitions. [2021-10-12 23:59:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-12 23:59:40,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:40,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:40,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-12 23:59:40,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1468155038, now seen corresponding path program 1 times [2021-10-12 23:59:40,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:40,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160367643] [2021-10-12 23:59:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:40,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:40,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:40,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160367643] [2021-10-12 23:59:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160367643] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:40,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:40,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:40,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571091851] [2021-10-12 23:59:40,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:40,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:40,636 INFO L87 Difference]: Start difference. First operand 235 states and 351 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:44,954 INFO L93 Difference]: Finished difference Result 376 states and 562 transitions. [2021-10-12 23:59:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-12 23:59:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:44,957 INFO L225 Difference]: With dead ends: 376 [2021-10-12 23:59:44,957 INFO L226 Difference]: Without dead ends: 251 [2021-10-12 23:59:44,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-12 23:59:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-12 23:59:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4957264957264957) internal successors, (350), 234 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 350 transitions. [2021-10-12 23:59:44,970 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 350 transitions. Word has length 54 [2021-10-12 23:59:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:44,970 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 350 transitions. [2021-10-12 23:59:44,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 350 transitions. [2021-10-12 23:59:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-12 23:59:44,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:44,974 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:44,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-12 23:59:44,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1486810496, now seen corresponding path program 1 times [2021-10-12 23:59:44,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:44,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835516519] [2021-10-12 23:59:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:44,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:45,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:45,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835516519] [2021-10-12 23:59:45,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835516519] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:45,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:45,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:45,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105807717] [2021-10-12 23:59:45,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:45,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:45,083 INFO L87 Difference]: Start difference. First operand 235 states and 350 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:49,396 INFO L93 Difference]: Finished difference Result 376 states and 560 transitions. [2021-10-12 23:59:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-12 23:59:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:49,399 INFO L225 Difference]: With dead ends: 376 [2021-10-12 23:59:49,399 INFO L226 Difference]: Without dead ends: 251 [2021-10-12 23:59:49,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-12 23:59:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-12 23:59:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4914529914529915) internal successors, (349), 234 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 349 transitions. [2021-10-12 23:59:49,410 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 349 transitions. Word has length 54 [2021-10-12 23:59:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:49,411 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 349 transitions. [2021-10-12 23:59:49,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 349 transitions. [2021-10-12 23:59:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-12 23:59:49,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:49,414 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:49,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-12 23:59:49,414 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1014296481, now seen corresponding path program 1 times [2021-10-12 23:59:49,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:49,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437915559] [2021-10-12 23:59:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:49,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:49,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:49,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437915559] [2021-10-12 23:59:49,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437915559] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:49,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:49,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:49,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72726486] [2021-10-12 23:59:49,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:49,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:49,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:49,503 INFO L87 Difference]: Start difference. First operand 235 states and 349 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:53,809 INFO L93 Difference]: Finished difference Result 376 states and 558 transitions. [2021-10-12 23:59:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-12 23:59:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:53,814 INFO L225 Difference]: With dead ends: 376 [2021-10-12 23:59:53,814 INFO L226 Difference]: Without dead ends: 251 [2021-10-12 23:59:53,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-12 23:59:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-12 23:59:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 348 transitions. [2021-10-12 23:59:53,822 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 348 transitions. Word has length 55 [2021-10-12 23:59:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:53,822 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 348 transitions. [2021-10-12 23:59:53,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 348 transitions. [2021-10-12 23:59:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-12 23:59:53,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:53,824 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:53,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-12 23:59:53,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:53,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1792231515, now seen corresponding path program 1 times [2021-10-12 23:59:53,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:53,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208092255] [2021-10-12 23:59:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:53,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:53,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:53,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208092255] [2021-10-12 23:59:53,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208092255] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:53,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:53,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:53,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194472366] [2021-10-12 23:59:53,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:53,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:53,902 INFO L87 Difference]: Start difference. First operand 235 states and 348 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2021-10-12 23:59:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:58,208 INFO L93 Difference]: Finished difference Result 376 states and 556 transitions. [2021-10-12 23:59:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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 56 [2021-10-12 23:59:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:58,211 INFO L225 Difference]: With dead ends: 376 [2021-10-12 23:59:58,211 INFO L226 Difference]: Without dead ends: 251 [2021-10-12 23:59:58,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-12 23:59:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-12 23:59:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.482905982905983) internal successors, (347), 234 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 347 transitions. [2021-10-12 23:59:58,219 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 347 transitions. Word has length 56 [2021-10-12 23:59:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:58,220 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 347 transitions. [2021-10-12 23:59:58,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2021-10-12 23:59:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 347 transitions. [2021-10-12 23:59:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-12 23:59:58,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:58,221 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:58,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-12 23:59:58,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1615585892, now seen corresponding path program 1 times [2021-10-12 23:59:58,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:58,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537637136] [2021-10-12 23:59:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:58,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:58,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:58,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537637136] [2021-10-12 23:59:58,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537637136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:58,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:58,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:58,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214794690] [2021-10-12 23:59:58,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:58,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:58,319 INFO L87 Difference]: Start difference. First operand 235 states and 347 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:02,576 INFO L93 Difference]: Finished difference Result 367 states and 543 transitions. [2021-10-13 00:00:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-10-13 00:00:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:02,579 INFO L225 Difference]: With dead ends: 367 [2021-10-13 00:00:02,579 INFO L226 Difference]: Without dead ends: 242 [2021-10-13 00:00:02,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-13 00:00:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2021-10-13 00:00:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4786324786324787) internal successors, (346), 234 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2021-10-13 00:00:02,586 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 57 [2021-10-13 00:00:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:02,586 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2021-10-13 00:00:02,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2021-10-13 00:00:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-13 00:00:02,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:02,587 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:02,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:00:02,587 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1711683715, now seen corresponding path program 1 times [2021-10-13 00:00:02,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:02,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372139586] [2021-10-13 00:00:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:02,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:00:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:02,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372139586] [2021-10-13 00:00:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372139586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:02,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:02,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611966048] [2021-10-13 00:00:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:02,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:02,705 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2021-10-13 00:00:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:04,777 INFO L93 Difference]: Finished difference Result 482 states and 714 transitions. [2021-10-13 00:00:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:04,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 57 [2021-10-13 00:00:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:04,780 INFO L225 Difference]: With dead ends: 482 [2021-10-13 00:00:04,781 INFO L226 Difference]: Without dead ends: 357 [2021-10-13 00:00:04,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-13 00:00:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-10-13 00:00:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.4691011235955056) internal successors, (523), 356 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 523 transitions. [2021-10-13 00:00:04,792 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 523 transitions. Word has length 57 [2021-10-13 00:00:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:04,793 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 523 transitions. [2021-10-13 00:00:04,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2021-10-13 00:00:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 523 transitions. [2021-10-13 00:00:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-13 00:00:04,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:04,794 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:00:04,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1773723329, now seen corresponding path program 1 times [2021-10-13 00:00:04,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:04,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702654736] [2021-10-13 00:00:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:04,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:04,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:04,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702654736] [2021-10-13 00:00:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702654736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:04,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:04,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:04,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577661004] [2021-10-13 00:00:04,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:04,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:04,852 INFO L87 Difference]: Start difference. First operand 357 states and 523 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:06,901 INFO L93 Difference]: Finished difference Result 628 states and 919 transitions. [2021-10-13 00:00:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-10-13 00:00:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:06,904 INFO L225 Difference]: With dead ends: 628 [2021-10-13 00:00:06,904 INFO L226 Difference]: Without dead ends: 381 [2021-10-13 00:00:06,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-13 00:00:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2021-10-13 00:00:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.4605263157894737) internal successors, (555), 380 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 555 transitions. [2021-10-13 00:00:06,917 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 555 transitions. Word has length 57 [2021-10-13 00:00:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:06,917 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 555 transitions. [2021-10-13 00:00:06,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 555 transitions. [2021-10-13 00:00:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 00:00:06,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:06,919 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:06,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:00:06,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1922596163, now seen corresponding path program 1 times [2021-10-13 00:00:06,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:06,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938750574] [2021-10-13 00:00:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:06,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:00:07,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:07,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938750574] [2021-10-13 00:00:07,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938750574] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:07,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:07,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:07,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813209667] [2021-10-13 00:00:07,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:07,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:07,006 INFO L87 Difference]: Start difference. First operand 381 states and 555 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2021-10-13 00:00:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:11,516 INFO L93 Difference]: Finished difference Result 1035 states and 1516 transitions. [2021-10-13 00:00:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) Word has length 77 [2021-10-13 00:00:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:11,521 INFO L225 Difference]: With dead ends: 1035 [2021-10-13 00:00:11,521 INFO L226 Difference]: Without dead ends: 661 [2021-10-13 00:00:11,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-10-13 00:00:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 444. [2021-10-13 00:00:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.489841986455982) internal successors, (660), 443 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 660 transitions. [2021-10-13 00:00:11,555 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 660 transitions. Word has length 77 [2021-10-13 00:00:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 660 transitions. [2021-10-13 00:00:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2021-10-13 00:00:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 660 transitions. [2021-10-13 00:00:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 00:00:11,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:11,557 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:11,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:00:11,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:11,558 INFO L82 PathProgramCache]: Analyzing trace with hash -126791679, now seen corresponding path program 1 times [2021-10-13 00:00:11,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:11,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956681013] [2021-10-13 00:00:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:11,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:11,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:11,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956681013] [2021-10-13 00:00:11,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956681013] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:11,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:11,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:11,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233158514] [2021-10-13 00:00:11,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:11,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:11,634 INFO L87 Difference]: Start difference. First operand 444 states and 660 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:16,000 INFO L93 Difference]: Finished difference Result 1021 states and 1516 transitions. [2021-10-13 00:00:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:16,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-10-13 00:00:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:16,005 INFO L225 Difference]: With dead ends: 1021 [2021-10-13 00:00:16,005 INFO L226 Difference]: Without dead ends: 584 [2021-10-13 00:00:16,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-13 00:00:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 510. [2021-10-13 00:00:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5206286836935168) internal successors, (774), 509 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 774 transitions. [2021-10-13 00:00:16,024 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 774 transitions. Word has length 77 [2021-10-13 00:00:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:16,025 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 774 transitions. [2021-10-13 00:00:16,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 774 transitions. [2021-10-13 00:00:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 00:00:16,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:16,027 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:16,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 00:00:16,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:16,028 INFO L82 PathProgramCache]: Analyzing trace with hash 416305772, now seen corresponding path program 1 times [2021-10-13 00:00:16,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:16,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278531789] [2021-10-13 00:00:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:16,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:16,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:16,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278531789] [2021-10-13 00:00:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278531789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:16,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707012755] [2021-10-13 00:00:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:16,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:16,116 INFO L87 Difference]: Start difference. First operand 510 states and 774 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-10-13 00:00:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:20,411 INFO L93 Difference]: Finished difference Result 1084 states and 1624 transitions. [2021-10-13 00:00:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) Word has length 92 [2021-10-13 00:00:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:20,416 INFO L225 Difference]: With dead ends: 1084 [2021-10-13 00:00:20,416 INFO L226 Difference]: Without dead ends: 581 [2021-10-13 00:00:20,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-13 00:00:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-13 00:00:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5147347740667976) internal successors, (771), 509 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 771 transitions. [2021-10-13 00:00:20,434 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 771 transitions. Word has length 92 [2021-10-13 00:00:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:20,435 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 771 transitions. [2021-10-13 00:00:20,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-10-13 00:00:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 771 transitions. [2021-10-13 00:00:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 00:00:20,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:20,437 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:20,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 00:00:20,437 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash 397650314, now seen corresponding path program 1 times [2021-10-13 00:00:20,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:20,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138659986] [2021-10-13 00:00:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:20,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:20,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:20,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138659986] [2021-10-13 00:00:20,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138659986] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:20,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:20,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:20,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457033715] [2021-10-13 00:00:20,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:20,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:20,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:20,528 INFO L87 Difference]: Start difference. First operand 510 states and 771 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-10-13 00:00:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:24,845 INFO L93 Difference]: Finished difference Result 1084 states and 1618 transitions. [2021-10-13 00:00:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) Word has length 92 [2021-10-13 00:00:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:24,851 INFO L225 Difference]: With dead ends: 1084 [2021-10-13 00:00:24,851 INFO L226 Difference]: Without dead ends: 581 [2021-10-13 00:00:24,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-13 00:00:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-13 00:00:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5088408644400786) internal successors, (768), 509 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 768 transitions. [2021-10-13 00:00:24,870 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 768 transitions. Word has length 92 [2021-10-13 00:00:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:24,871 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 768 transitions. [2021-10-13 00:00:24,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-10-13 00:00:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 768 transitions. [2021-10-13 00:00:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 00:00:24,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:24,873 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:24,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 00:00:24,873 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1569413781, now seen corresponding path program 1 times [2021-10-13 00:00:24,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:24,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119862430] [2021-10-13 00:00:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:24,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:24,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:24,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119862430] [2021-10-13 00:00:24,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119862430] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:24,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:24,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:24,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370010450] [2021-10-13 00:00:24,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:24,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:24,964 INFO L87 Difference]: Start difference. First operand 510 states and 768 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:29,285 INFO L93 Difference]: Finished difference Result 1084 states and 1612 transitions. [2021-10-13 00:00:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-13 00:00:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:29,290 INFO L225 Difference]: With dead ends: 1084 [2021-10-13 00:00:29,290 INFO L226 Difference]: Without dead ends: 581 [2021-10-13 00:00:29,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-13 00:00:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-13 00:00:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5029469548133596) internal successors, (765), 509 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 765 transitions. [2021-10-13 00:00:29,310 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 765 transitions. Word has length 93 [2021-10-13 00:00:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:29,310 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 765 transitions. [2021-10-13 00:00:29,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 765 transitions. [2021-10-13 00:00:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-13 00:00:29,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:29,315 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:29,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 00:00:29,316 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 993375279, now seen corresponding path program 1 times [2021-10-13 00:00:29,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:29,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26991077] [2021-10-13 00:00:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:29,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:29,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:29,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26991077] [2021-10-13 00:00:29,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26991077] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:29,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:29,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:29,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289245031] [2021-10-13 00:00:29,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:29,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:29,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:29,421 INFO L87 Difference]: Start difference. First operand 510 states and 765 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:33,721 INFO L93 Difference]: Finished difference Result 1084 states and 1606 transitions. [2021-10-13 00:00:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:33,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 94 [2021-10-13 00:00:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:33,725 INFO L225 Difference]: With dead ends: 1084 [2021-10-13 00:00:33,726 INFO L226 Difference]: Without dead ends: 581 [2021-10-13 00:00:33,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-13 00:00:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-13 00:00:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4970530451866404) internal successors, (762), 509 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 762 transitions. [2021-10-13 00:00:33,744 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 762 transitions. Word has length 94 [2021-10-13 00:00:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:33,744 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 762 transitions. [2021-10-13 00:00:33,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 762 transitions. [2021-10-13 00:00:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-13 00:00:33,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:33,746 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:33,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 00:00:33,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2070050586, now seen corresponding path program 1 times [2021-10-13 00:00:33,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:33,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347398586] [2021-10-13 00:00:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:33,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:33,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:33,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347398586] [2021-10-13 00:00:33,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347398586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:33,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:33,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:33,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416331413] [2021-10-13 00:00:33,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:33,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:33,859 INFO L87 Difference]: Start difference. First operand 510 states and 762 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:38,143 INFO L93 Difference]: Finished difference Result 1057 states and 1567 transitions. [2021-10-13 00:00:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:38,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-10-13 00:00:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:38,147 INFO L225 Difference]: With dead ends: 1057 [2021-10-13 00:00:38,148 INFO L226 Difference]: Without dead ends: 554 [2021-10-13 00:00:38,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-13 00:00:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2021-10-13 00:00:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4911591355599214) internal successors, (759), 509 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 759 transitions. [2021-10-13 00:00:38,165 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 759 transitions. Word has length 95 [2021-10-13 00:00:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:38,166 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 759 transitions. [2021-10-13 00:00:38,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 759 transitions. [2021-10-13 00:00:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-13 00:00:38,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:38,168 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:38,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 00:00:38,169 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:38,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2066779273, now seen corresponding path program 1 times [2021-10-13 00:00:38,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:38,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860914118] [2021-10-13 00:00:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:38,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:38,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:38,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860914118] [2021-10-13 00:00:38,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860914118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:38,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:38,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:38,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070273344] [2021-10-13 00:00:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:38,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:38,276 INFO L87 Difference]: Start difference. First operand 510 states and 759 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:42,539 INFO L93 Difference]: Finished difference Result 1057 states and 1561 transitions. [2021-10-13 00:00:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-10-13 00:00:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:42,545 INFO L225 Difference]: With dead ends: 1057 [2021-10-13 00:00:42,546 INFO L226 Difference]: Without dead ends: 554 [2021-10-13 00:00:42,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-13 00:00:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2021-10-13 00:00:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4852652259332024) internal successors, (756), 509 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 756 transitions. [2021-10-13 00:00:42,566 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 756 transitions. Word has length 95 [2021-10-13 00:00:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:42,566 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 756 transitions. [2021-10-13 00:00:42,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 756 transitions. [2021-10-13 00:00:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-13 00:00:42,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:42,568 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:42,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 00:00:42,569 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 952822956, now seen corresponding path program 1 times [2021-10-13 00:00:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:42,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213140905] [2021-10-13 00:00:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:42,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:42,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:42,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213140905] [2021-10-13 00:00:42,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213140905] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:42,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:42,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:42,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490978000] [2021-10-13 00:00:42,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:42,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:42,643 INFO L87 Difference]: Start difference. First operand 510 states and 756 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,925 INFO L93 Difference]: Finished difference Result 1045 states and 1539 transitions. [2021-10-13 00:00:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:46,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-10-13 00:00:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,928 INFO L225 Difference]: With dead ends: 1045 [2021-10-13 00:00:46,928 INFO L226 Difference]: Without dead ends: 542 [2021-10-13 00:00:46,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-13 00:00:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2021-10-13 00:00:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4793713163064832) internal successors, (753), 509 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 753 transitions. [2021-10-13 00:00:46,969 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 753 transitions. Word has length 96 [2021-10-13 00:00:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,969 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 753 transitions. [2021-10-13 00:00:46,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 753 transitions. [2021-10-13 00:00:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:00:46,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,972 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 00:00:46,972 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1844388260, now seen corresponding path program 1 times [2021-10-13 00:00:46,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816712499] [2021-10-13 00:00:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:00:47,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816712499] [2021-10-13 00:00:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816712499] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:47,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:47,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:47,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475234724] [2021-10-13 00:00:47,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:47,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:47,056 INFO L87 Difference]: Start difference. First operand 510 states and 753 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:49,112 INFO L93 Difference]: Finished difference Result 1032 states and 1526 transitions. [2021-10-13 00:00:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:49,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-13 00:00:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:49,117 INFO L225 Difference]: With dead ends: 1032 [2021-10-13 00:00:49,117 INFO L226 Difference]: Without dead ends: 675 [2021-10-13 00:00:49,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-10-13 00:00:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2021-10-13 00:00:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.4776785714285714) internal successors, (993), 672 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 993 transitions. [2021-10-13 00:00:49,138 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 993 transitions. Word has length 98 [2021-10-13 00:00:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:49,138 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 993 transitions. [2021-10-13 00:00:49,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 993 transitions. [2021-10-13 00:00:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:00:49,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:49,141 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:49,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 00:00:49,141 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1703839650, now seen corresponding path program 1 times [2021-10-13 00:00:49,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:49,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220901986] [2021-10-13 00:00:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:49,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 00:00:49,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220901986] [2021-10-13 00:00:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220901986] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:49,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:49,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229752286] [2021-10-13 00:00:49,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:49,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:49,205 INFO L87 Difference]: Start difference. First operand 673 states and 993 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:51,269 INFO L93 Difference]: Finished difference Result 1191 states and 1757 transitions. [2021-10-13 00:00:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:51,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 98 [2021-10-13 00:00:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:51,274 INFO L225 Difference]: With dead ends: 1191 [2021-10-13 00:00:51,274 INFO L226 Difference]: Without dead ends: 671 [2021-10-13 00:00:51,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-10-13 00:00:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-10-13 00:00:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.4701492537313432) internal successors, (985), 670 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 985 transitions. [2021-10-13 00:00:51,294 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 985 transitions. Word has length 98 [2021-10-13 00:00:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:51,295 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 985 transitions. [2021-10-13 00:00:51,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 985 transitions. [2021-10-13 00:00:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 00:00:51,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:51,299 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 00:00:51,299 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:51,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-13 00:00:51,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:51,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550765058] [2021-10-13 00:00:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:51,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:00:51,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:51,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550765058] [2021-10-13 00:00:51,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550765058] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:51,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:51,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:51,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950885653] [2021-10-13 00:00:51,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:51,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:51,382 INFO L87 Difference]: Start difference. First operand 671 states and 985 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:55,694 INFO L93 Difference]: Finished difference Result 1492 states and 2185 transitions. [2021-10-13 00:00:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:55,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-13 00:00:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:55,700 INFO L225 Difference]: With dead ends: 1492 [2021-10-13 00:00:55,700 INFO L226 Difference]: Without dead ends: 828 [2021-10-13 00:00:55,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-10-13 00:00:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 743. [2021-10-13 00:00:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4973045822102427) internal successors, (1111), 742 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1111 transitions. [2021-10-13 00:00:55,747 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1111 transitions. Word has length 100 [2021-10-13 00:00:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:55,747 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1111 transitions. [2021-10-13 00:00:55,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1111 transitions. [2021-10-13 00:00:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 00:00:55,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:55,750 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:55,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-13 00:00:55,751 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-13 00:00:55,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:55,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892229913] [2021-10-13 00:00:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:55,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:00:55,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:55,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892229913] [2021-10-13 00:00:55,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892229913] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:55,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:55,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:55,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298460277] [2021-10-13 00:00:55,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:55,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:55,836 INFO L87 Difference]: Start difference. First operand 743 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:00,129 INFO L93 Difference]: Finished difference Result 1561 states and 2305 transitions. [2021-10-13 00:01:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 115 [2021-10-13 00:01:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:00,135 INFO L225 Difference]: With dead ends: 1561 [2021-10-13 00:01:00,135 INFO L226 Difference]: Without dead ends: 825 [2021-10-13 00:01:00,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-13 00:01:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-13 00:01:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4932614555256065) internal successors, (1108), 742 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1108 transitions. [2021-10-13 00:01:00,163 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1108 transitions. Word has length 115 [2021-10-13 00:01:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:00,164 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1108 transitions. [2021-10-13 00:01:00,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1108 transitions. [2021-10-13 00:01:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 00:01:00,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:00,166 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:00,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 00:01:00,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-13 00:01:00,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:00,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411349536] [2021-10-13 00:01:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:00,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:01:00,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:00,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411349536] [2021-10-13 00:01:00,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411349536] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:00,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:00,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:00,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132842505] [2021-10-13 00:01:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:00,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:00,306 INFO L87 Difference]: Start difference. First operand 743 states and 1108 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:04,554 INFO L93 Difference]: Finished difference Result 1561 states and 2299 transitions. [2021-10-13 00:01:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 115 [2021-10-13 00:01:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:04,559 INFO L225 Difference]: With dead ends: 1561 [2021-10-13 00:01:04,560 INFO L226 Difference]: Without dead ends: 825 [2021-10-13 00:01:04,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-13 00:01:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-13 00:01:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4892183288409704) internal successors, (1105), 742 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1105 transitions. [2021-10-13 00:01:04,586 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1105 transitions. Word has length 115 [2021-10-13 00:01:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:04,587 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1105 transitions. [2021-10-13 00:01:04,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1105 transitions. [2021-10-13 00:01:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-13 00:01:04,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:04,590 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:04,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-13 00:01:04,590 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -849536469, now seen corresponding path program 1 times [2021-10-13 00:01:04,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:04,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798840602] [2021-10-13 00:01:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:04,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:01:04,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798840602] [2021-10-13 00:01:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798840602] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:04,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:04,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:04,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435669165] [2021-10-13 00:01:04,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:04,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:04,691 INFO L87 Difference]: Start difference. First operand 743 states and 1105 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:08,956 INFO L93 Difference]: Finished difference Result 1561 states and 2293 transitions. [2021-10-13 00:01:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 116 [2021-10-13 00:01:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:08,962 INFO L225 Difference]: With dead ends: 1561 [2021-10-13 00:01:08,963 INFO L226 Difference]: Without dead ends: 825 [2021-10-13 00:01:08,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-13 00:01:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-13 00:01:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4851752021563343) internal successors, (1102), 742 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1102 transitions. [2021-10-13 00:01:08,987 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1102 transitions. Word has length 116 [2021-10-13 00:01:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:08,988 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1102 transitions. [2021-10-13 00:01:08,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1102 transitions. [2021-10-13 00:01:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-13 00:01:08,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:08,991 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:08,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-13 00:01:08,991 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:08,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1134529903, now seen corresponding path program 1 times [2021-10-13 00:01:08,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:08,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596269727] [2021-10-13 00:01:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:08,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:01:09,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:09,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596269727] [2021-10-13 00:01:09,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596269727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:09,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:09,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:09,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553334868] [2021-10-13 00:01:09,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:09,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:09,071 INFO L87 Difference]: Start difference. First operand 743 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:13,311 INFO L93 Difference]: Finished difference Result 1561 states and 2287 transitions. [2021-10-13 00:01:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 117 [2021-10-13 00:01:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:13,319 INFO L225 Difference]: With dead ends: 1561 [2021-10-13 00:01:13,319 INFO L226 Difference]: Without dead ends: 825 [2021-10-13 00:01:13,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-13 00:01:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-13 00:01:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4811320754716981) internal successors, (1099), 742 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1099 transitions. [2021-10-13 00:01:13,345 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1099 transitions. Word has length 117 [2021-10-13 00:01:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:13,345 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1099 transitions. [2021-10-13 00:01:13,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1099 transitions. [2021-10-13 00:01:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 00:01:13,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:13,348 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:13,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-13 00:01:13,348 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 182595248, now seen corresponding path program 1 times [2021-10-13 00:01:13,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:13,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842695741] [2021-10-13 00:01:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:13,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:01:13,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:13,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842695741] [2021-10-13 00:01:13,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842695741] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:13,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:13,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:13,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993007935] [2021-10-13 00:01:13,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:13,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:13,457 INFO L87 Difference]: Start difference. First operand 743 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2021-10-13 00:01:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:17,713 INFO L93 Difference]: Finished difference Result 1534 states and 2248 transitions. [2021-10-13 00:01:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:17,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) Word has length 118 [2021-10-13 00:01:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:17,719 INFO L225 Difference]: With dead ends: 1534 [2021-10-13 00:01:17,719 INFO L226 Difference]: Without dead ends: 798 [2021-10-13 00:01:17,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-10-13 00:01:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 743. [2021-10-13 00:01:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.477088948787062) internal successors, (1096), 742 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1096 transitions. [2021-10-13 00:01:17,742 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1096 transitions. Word has length 118 [2021-10-13 00:01:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:17,743 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1096 transitions. [2021-10-13 00:01:17,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2021-10-13 00:01:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1096 transitions. [2021-10-13 00:01:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 00:01:17,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:17,746 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:17,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-13 00:01:17,746 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1828816845, now seen corresponding path program 1 times [2021-10-13 00:01:17,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:17,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340332678] [2021-10-13 00:01:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:17,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 00:01:17,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:17,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340332678] [2021-10-13 00:01:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340332678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:17,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928265377] [2021-10-13 00:01:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:17,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:17,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:17,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:17,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:01:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:01:18,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:18,178 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:01:18,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:01:18,329 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:01:18,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:01:18,480 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:01:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:01:18,671 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:01:18,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:01:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 113 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-13 00:01:18,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928265377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:18,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:18,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-10-13 00:01:18,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844033092] [2021-10-13 00:01:18,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:01:18,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:01:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:01:18,760 INFO L87 Difference]: Start difference. First operand 743 states and 1096 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:34,828 INFO L93 Difference]: Finished difference Result 2253 states and 3254 transitions. [2021-10-13 00:01:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:01:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 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 118 [2021-10-13 00:01:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:34,837 INFO L225 Difference]: With dead ends: 2253 [2021-10-13 00:01:34,837 INFO L226 Difference]: Without dead ends: 1517 [2021-10-13 00:01:34,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:01:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-10-13 00:01:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1303. [2021-10-13 00:01:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 1.4746543778801844) internal successors, (1920), 1302 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1920 transitions. [2021-10-13 00:01:34,881 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1920 transitions. Word has length 118 [2021-10-13 00:01:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:34,882 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1920 transitions. [2021-10-13 00:01:34,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1920 transitions. [2021-10-13 00:01:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-13 00:01:34,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:34,885 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:34,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:35,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:35,114 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:35,114 INFO L82 PathProgramCache]: Analyzing trace with hash 467198890, now seen corresponding path program 1 times [2021-10-13 00:01:35,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:35,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606279399] [2021-10-13 00:01:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:35,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-13 00:01:35,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:35,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606279399] [2021-10-13 00:01:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606279399] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:35,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:35,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:35,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670022123] [2021-10-13 00:01:35,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:35,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:35,213 INFO L87 Difference]: Start difference. First operand 1303 states and 1920 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:39,574 INFO L93 Difference]: Finished difference Result 2700 states and 3962 transitions. [2021-10-13 00:01:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-13 00:01:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:39,583 INFO L225 Difference]: With dead ends: 2700 [2021-10-13 00:01:39,583 INFO L226 Difference]: Without dead ends: 1404 [2021-10-13 00:01:39,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-10-13 00:01:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1317. [2021-10-13 00:01:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.4817629179331306) internal successors, (1950), 1316 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1950 transitions. [2021-10-13 00:01:39,632 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1950 transitions. Word has length 119 [2021-10-13 00:01:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1950 transitions. [2021-10-13 00:01:39,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1950 transitions. [2021-10-13 00:01:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-13 00:01:39,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:39,636 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:39,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-13 00:01:39,637 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1731483519, now seen corresponding path program 1 times [2021-10-13 00:01:39,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:39,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674733316] [2021-10-13 00:01:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:39,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-13 00:01:39,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:39,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674733316] [2021-10-13 00:01:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674733316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:39,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:39,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:39,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793476015] [2021-10-13 00:01:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:39,717 INFO L87 Difference]: Start difference. First operand 1317 states and 1950 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:44,234 INFO L93 Difference]: Finished difference Result 2894 states and 4266 transitions. [2021-10-13 00:01:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 120 [2021-10-13 00:01:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:44,244 INFO L225 Difference]: With dead ends: 2894 [2021-10-13 00:01:44,244 INFO L226 Difference]: Without dead ends: 1584 [2021-10-13 00:01:44,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-10-13 00:01:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1321. [2021-10-13 00:01:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 1.4803030303030302) internal successors, (1954), 1320 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1954 transitions. [2021-10-13 00:01:44,312 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1954 transitions. Word has length 120 [2021-10-13 00:01:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:44,313 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1954 transitions. [2021-10-13 00:01:44,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1954 transitions. [2021-10-13 00:01:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-13 00:01:44,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:44,317 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:44,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 00:01:44,317 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1820752595, now seen corresponding path program 1 times [2021-10-13 00:01:44,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:44,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850309376] [2021-10-13 00:01:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:44,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-13 00:01:44,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:44,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850309376] [2021-10-13 00:01:44,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850309376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:44,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:44,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:01:44,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147839820] [2021-10-13 00:01:44,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:44,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:44,507 INFO L87 Difference]: Start difference. First operand 1321 states and 1954 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:46,764 INFO L93 Difference]: Finished difference Result 2639 states and 3902 transitions. [2021-10-13 00:01:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 122 [2021-10-13 00:01:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:46,772 INFO L225 Difference]: With dead ends: 2639 [2021-10-13 00:01:46,772 INFO L226 Difference]: Without dead ends: 1325 [2021-10-13 00:01:46,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-10-13 00:01:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1324. [2021-10-13 00:01:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.4792139077853363) internal successors, (1957), 1323 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1957 transitions. [2021-10-13 00:01:46,813 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1957 transitions. Word has length 122 [2021-10-13 00:01:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:46,813 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1957 transitions. [2021-10-13 00:01:46,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1957 transitions. [2021-10-13 00:01:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-13 00:01:46,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:46,817 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:46,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-13 00:01:46,818 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-13 00:01:46,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:46,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950034757] [2021-10-13 00:01:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:46,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:01:47,337 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:01:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:01:47,791 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:01:47,792 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:01:47,793 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:01:47,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-13 00:01:47,804 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:01:47,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:01:47 BoogieIcfgContainer [2021-10-13 00:01:47,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:01:47,981 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:01:47,981 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:01:47,981 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:01:47,982 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:35" (3/4) ... [2021-10-13 00:01:47,985 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:01:47,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:01:47,986 INFO L168 Benchmark]: Toolchain (without parser) took 137188.12 ms. Allocated memory was 104.9 MB in the beginning and 184.5 MB in the end (delta: 79.7 MB). Free memory was 64.3 MB in the beginning and 93.0 MB in the end (delta: -28.7 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:47,986 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 104.9 MB. Free memory is still 82.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:01:47,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 733.18 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 60.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:47,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.45 ms. Allocated memory is still 104.9 MB. Free memory was 60.7 MB in the beginning and 56.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:47,988 INFO L168 Benchmark]: Boogie Preprocessor took 135.67 ms. Allocated memory is still 104.9 MB. Free memory was 56.1 MB in the beginning and 49.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:47,988 INFO L168 Benchmark]: RCFGBuilder took 3329.09 ms. Allocated memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: 41.9 MB). Free memory was 49.2 MB in the beginning and 71.3 MB in the end (delta: -22.0 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:47,988 INFO L168 Benchmark]: TraceAbstraction took 132850.13 ms. Allocated memory was 146.8 MB in the beginning and 184.5 MB in the end (delta: 37.7 MB). Free memory was 70.2 MB in the beginning and 93.0 MB in the end (delta: -22.8 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:47,989 INFO L168 Benchmark]: Witness Printer took 3.83 ms. Allocated memory is still 184.5 MB. Free memory is still 93.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:01:47,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 104.9 MB. Free memory is still 82.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 733.18 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 60.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 127.45 ms. Allocated memory is still 104.9 MB. Free memory was 60.7 MB in the beginning and 56.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 135.67 ms. Allocated memory is still 104.9 MB. Free memory was 56.1 MB in the beginning and 49.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3329.09 ms. Allocated memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: 41.9 MB). Free memory was 49.2 MB in the beginning and 71.3 MB in the end (delta: -22.0 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 132850.13 ms. Allocated memory was 146.8 MB in the beginning and 184.5 MB in the end (delta: 37.7 MB). Free memory was 70.2 MB in the beginning and 93.0 MB in the end (delta: -22.8 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.83 ms. Allocated memory is still 184.5 MB. Free memory is still 93.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1658]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 1343. Possible FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={8:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={8:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={8:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={8:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={8:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={8:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={8:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={8:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={8:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={8:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={8:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={8:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={8:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={8:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={8:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={8:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={8:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 132610.0ms, OverallIterations: 31, TraceHistogramMax: 7, EmptinessCheckTime: 74.4ms, AutomataDifference: 126264.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6589 SDtfs, 1802 SDslu, 9494 SDs, 0 SdLazy, 5005 SolverSat, 177 SolverUnsat, 58 SolverUnknown, 0 SolverNotchecked, 122880.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 570.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1324occurred in iteration=30, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 736.7ms AutomataMinimizationTime, 30 MinimizatonAttempts, 1818 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 291.5ms SsaConstructionTime, 1637.7ms SatisfiabilityAnalysisTime, 2407.0ms InterpolantComputationTime, 2875 NumberOfCodeBlocks, 2875 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2707 ConstructedInterpolants, 0 QuantifiedInterpolants, 6410 SizeOfPredicates, 4 NumberOfNonLiveVariables, 517 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 31 InterpolantComputations, 29 PerfectInterpolantSequences, 3026/3066 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 00:01:48,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:01:50,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:01:50,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:01:50,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:01:50,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:01:50,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:01:50,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:01:50,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:01:50,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:01:50,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:01:50,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:01:50,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:01:50,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:01:50,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:01:50,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:01:50,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:01:50,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:01:50,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:01:50,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:01:50,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:01:50,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:01:50,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:01:50,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:01:50,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:01:50,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:01:50,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:01:50,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:01:50,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:01:50,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:01:50,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-10-13 00:01:50,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:01:50,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:01:50,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:01:50,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-13 00:01:50,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:01:50,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:01:50,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:01:50,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:01:50,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:01:50,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:01:50,630 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:01:50,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:01:50,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:01:50,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:01:50,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:01:50,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:01:50,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:01:50,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:01:50,633 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:01:50,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:01:50,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:01:50,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:01:50,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:01:50,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:01:50,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:01:50,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:01:50,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:01:50,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:01:50,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:01:50,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:01:50,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:01:50,636 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:01:50,637 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:01:50,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:01:50,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:01:50,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:01:50,638 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_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22366af6514966a73d28a63d2bc4f38bf02b60e4 [2021-10-13 00:01:51,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:01:51,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:01:51,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:01:51,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:01:51,062 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:01:51,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loops/s3.i [2021-10-13 00:01:51,131 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/a3853f619/ad9f87c52be842719ed6d674aa9adad9/FLAG3f2ca8751 [2021-10-13 00:01:51,875 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:01:51,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/sv-benchmarks/c/loops/s3.i [2021-10-13 00:01:51,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/a3853f619/ad9f87c52be842719ed6d674aa9adad9/FLAG3f2ca8751 [2021-10-13 00:01:51,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/data/a3853f619/ad9f87c52be842719ed6d674aa9adad9 [2021-10-13 00:01:51,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:01:51,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:01:51,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:01:51,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:01:51,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:01:51,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:01:51" (1/1) ... [2021-10-13 00:01:51,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b970e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:51, skipping insertion in model container [2021-10-13 00:01:51,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:01:51" (1/1) ... [2021-10-13 00:01:51,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:01:52,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:01:52,520 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-13 00:01:52,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:01:52,555 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:01:52,717 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-13 00:01:52,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:01:52,765 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:01:52,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52 WrapperNode [2021-10-13 00:01:52,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:01:52,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:01:52,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:01:52,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:01:52,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:01:52,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:01:52,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:01:52,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:01:52,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:01:52,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:01:52,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:01:52,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:01:52,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:01:52,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:53,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:01:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:01:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:01:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:01:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:01:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:01:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:01:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:01:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:01:53,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:01:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 00:01:53,299 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 00:01:57,555 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-13 00:01:57,555 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-13 00:01:57,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:01:57,564 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 00:01:57,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:57 BoogieIcfgContainer [2021-10-13 00:01:57,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:01:57,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:01:57,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:01:57,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:01:57,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:01:51" (1/3) ... [2021-10-13 00:01:57,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a9db2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:01:57, skipping insertion in model container [2021-10-13 00:01:57,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (2/3) ... [2021-10-13 00:01:57,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a9db2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:01:57, skipping insertion in model container [2021-10-13 00:01:57,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:57" (3/3) ... [2021-10-13 00:01:57,574 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-13 00:01:57,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:01:57,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:01:57,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:01:57,635 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:01:57,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:01:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:01:57,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:57,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:57,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:57,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-13 00:01:57,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:57,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650584529] [2021-10-13 00:01:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:57,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:57,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:57,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:01:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:01:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:58,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:58,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:58,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650584529] [2021-10-13 00:01:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650584529] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:58,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:58,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:01:58,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473435967] [2021-10-13 00:01:58,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:58,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:58,570 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 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) [2021-10-13 00:01:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:58,739 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-13 00:01:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:58,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 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) Word has length 24 [2021-10-13 00:01:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:58,753 INFO L225 Difference]: With dead ends: 375 [2021-10-13 00:01:58,754 INFO L226 Difference]: Without dead ends: 217 [2021-10-13 00:01:58,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-13 00:01:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-13 00:01:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4814814814814814) internal successors, (320), 216 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) [2021-10-13 00:01:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 320 transitions. [2021-10-13 00:01:58,810 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 320 transitions. Word has length 24 [2021-10-13 00:01:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:58,810 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 320 transitions. [2021-10-13 00:01:58,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 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) [2021-10-13 00:01:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 320 transitions. [2021-10-13 00:01:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 00:01:58,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:58,814 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:58,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:59,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:01:59,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1495258694, now seen corresponding path program 1 times [2021-10-13 00:01:59,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:59,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626104670] [2021-10-13 00:01:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:59,034 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:59,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:59,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:01:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:01:59,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:59,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:59,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:59,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626104670] [2021-10-13 00:01:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626104670] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:59,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:59,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:01:59,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452911699] [2021-10-13 00:01:59,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:59,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:59,905 INFO L87 Difference]: Start difference. First operand 217 states and 320 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:02,183 INFO L93 Difference]: Finished difference Result 628 states and 933 transitions. [2021-10-13 00:02:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:02:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 00:02:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:02,189 INFO L225 Difference]: With dead ends: 628 [2021-10-13 00:02:02,189 INFO L226 Difference]: Without dead ends: 521 [2021-10-13 00:02:02,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:02:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-10-13 00:02:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 421. [2021-10-13 00:02:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.480952380952381) internal successors, (622), 420 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 622 transitions. [2021-10-13 00:02:02,273 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 622 transitions. Word has length 41 [2021-10-13 00:02:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:02,274 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 622 transitions. [2021-10-13 00:02:02,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 622 transitions. [2021-10-13 00:02:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 00:02:02,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:02,281 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:02,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:02,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:02:02,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:02,491 INFO L82 PathProgramCache]: Analyzing trace with hash 924360661, now seen corresponding path program 1 times [2021-10-13 00:02:02,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:02:02,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126486352] [2021-10-13 00:02:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:02,492 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:02:02,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:02:02,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:02:02,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:02:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:02:02,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:02:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:02:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:02:03,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:02:03,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126486352] [2021-10-13 00:02:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126486352] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:02:03,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:02:03,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:02:03,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299905562] [2021-10-13 00:02:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:02:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:02:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:02:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:02:03,686 INFO L87 Difference]: Start difference. First operand 421 states and 622 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:05,895 INFO L93 Difference]: Finished difference Result 939 states and 1394 transitions. [2021-10-13 00:02:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:02:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 80 [2021-10-13 00:02:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:05,902 INFO L225 Difference]: With dead ends: 939 [2021-10-13 00:02:05,902 INFO L226 Difference]: Without dead ends: 628 [2021-10-13 00:02:05,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:02:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-10-13 00:02:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-10-13 00:02:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.4784688995215312) internal successors, (927), 627 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 927 transitions. [2021-10-13 00:02:05,988 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 927 transitions. Word has length 80 [2021-10-13 00:02:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:05,990 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 927 transitions. [2021-10-13 00:02:05,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 927 transitions. [2021-10-13 00:02:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 00:02:06,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:06,006 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:06,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 00:02:06,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:02:06,220 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1855651051, now seen corresponding path program 1 times [2021-10-13 00:02:06,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:02:06,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791729306] [2021-10-13 00:02:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:06,223 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:02:06,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:02:06,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:02:06,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:02:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:06,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:02:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:06,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:02:06,928 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:02:06,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 00:02:07,376 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:02:07,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:02:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 00:02:07,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:02:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 00:02:08,347 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:02:08,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791729306] [2021-10-13 00:02:08,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791729306] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:02:08,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:02:08,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-13 00:02:08,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455355093] [2021-10-13 00:02:08,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:02:08,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:02:08,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:02:08,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:02:08,350 INFO L87 Difference]: Start difference. First operand 628 states and 927 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:25,134 INFO L93 Difference]: Finished difference Result 2264 states and 3359 transitions. [2021-10-13 00:02:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:02:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-13 00:02:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:25,148 INFO L225 Difference]: With dead ends: 2264 [2021-10-13 00:02:25,148 INFO L226 Difference]: Without dead ends: 1643 [2021-10-13 00:02:25,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:02:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-10-13 00:02:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 753. [2021-10-13 00:02:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.5106382978723405) internal successors, (1136), 752 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1136 transitions. [2021-10-13 00:02:25,201 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1136 transitions. Word has length 100 [2021-10-13 00:02:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:25,202 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1136 transitions. [2021-10-13 00:02:25,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1136 transitions. [2021-10-13 00:02:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 00:02:25,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:25,206 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:25,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:25,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:02:25,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-13 00:02:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:02:25,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449739402] [2021-10-13 00:02:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:25,429 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:02:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:02:25,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:02:25,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:02:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:25,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:02:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:26,217 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:02:26,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:02:26,810 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:02:26,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:02:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:02:26,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:02:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:02:27,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:02:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449739402] [2021-10-13 00:02:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449739402] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:02:27,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:02:27,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 00:02:27,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294899787] [2021-10-13 00:02:27,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:02:27,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:02:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:02:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:02:27,371 INFO L87 Difference]: Start difference. First operand 753 states and 1136 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:38,105 INFO L93 Difference]: Finished difference Result 1757 states and 2634 transitions. [2021-10-13 00:02:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:02:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 100 [2021-10-13 00:02:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:38,117 INFO L225 Difference]: With dead ends: 1757 [2021-10-13 00:02:38,118 INFO L226 Difference]: Without dead ends: 1011 [2021-10-13 00:02:38,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:02:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-10-13 00:02:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 873. [2021-10-13 00:02:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5378440366972477) internal successors, (1341), 872 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1341 transitions. [2021-10-13 00:02:38,166 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1341 transitions. Word has length 100 [2021-10-13 00:02:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:38,167 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1341 transitions. [2021-10-13 00:02:38,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1341 transitions. [2021-10-13 00:02:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 00:02:38,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:38,171 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:38,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:38,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:02:38,382 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-13 00:02:38,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:02:38,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513348377] [2021-10-13 00:02:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:38,387 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:02:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:02:38,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:02:38,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:02:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:02:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:39,378 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:02:39,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:02:39,621 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:02:39,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:02:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:02:39,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:02:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:02:40,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:02:40,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513348377] [2021-10-13 00:02:40,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513348377] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:02:40,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:02:40,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:02:40,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115107461] [2021-10-13 00:02:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:02:40,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:02:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:02:40,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:02:40,544 INFO L87 Difference]: Start difference. First operand 873 states and 1341 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:56,182 INFO L93 Difference]: Finished difference Result 2405 states and 3628 transitions. [2021-10-13 00:02:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:02:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-10-13 00:02:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:56,196 INFO L225 Difference]: With dead ends: 2405 [2021-10-13 00:02:56,197 INFO L226 Difference]: Without dead ends: 1539 [2021-10-13 00:02:56,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:02:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-10-13 00:02:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 931. [2021-10-13 00:02:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5204301075268818) internal successors, (1414), 930 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1414 transitions. [2021-10-13 00:02:56,262 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1414 transitions. Word has length 115 [2021-10-13 00:02:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:56,263 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1414 transitions. [2021-10-13 00:02:56,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1414 transitions. [2021-10-13 00:02:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 00:02:56,266 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:56,266 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:56,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:56,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:02:56,482 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-13 00:02:56,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:02:56,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101659434] [2021-10-13 00:02:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:56,483 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:02:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:02:56,484 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:02:56,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 00:02:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:02:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:57,506 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:02:57,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:02:57,777 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:02:57,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:02:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:02:58,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:02:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:02:58,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:02:58,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101659434] [2021-10-13 00:02:58,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101659434] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:02:58,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:02:58,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:02:58,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59674915] [2021-10-13 00:02:58,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:02:58,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:02:58,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:02:58,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:02:58,546 INFO L87 Difference]: Start difference. First operand 931 states and 1414 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:03:07,922 INFO L93 Difference]: Finished difference Result 2452 states and 3665 transitions. [2021-10-13 00:03:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:03:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 115 [2021-10-13 00:03:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:03:07,937 INFO L225 Difference]: With dead ends: 2452 [2021-10-13 00:03:07,937 INFO L226 Difference]: Without dead ends: 1531 [2021-10-13 00:03:07,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:03:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-10-13 00:03:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 936. [2021-10-13 00:03:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5058823529411764) internal successors, (1408), 935 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1408 transitions. [2021-10-13 00:03:08,015 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1408 transitions. Word has length 115 [2021-10-13 00:03:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:03:08,017 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1408 transitions. [2021-10-13 00:03:08,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1408 transitions. [2021-10-13 00:03:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 00:03:08,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:03:08,024 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:03:08,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:03:08,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:03:08,251 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:03:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:03:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash -647023955, now seen corresponding path program 1 times [2021-10-13 00:03:08,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:03:08,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383066334] [2021-10-13 00:03:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:03:08,252 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:03:08,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:03:08,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:03:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 00:03:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:03:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:03:09,262 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:03:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:03:09,648 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:03:09,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:03:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:09,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:03:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:10,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:03:10,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383066334] [2021-10-13 00:03:10,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383066334] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:03:10,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:03:10,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:03:10,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653516452] [2021-10-13 00:03:10,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:03:10,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:03:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:03:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:03:10,460 INFO L87 Difference]: Start difference. First operand 936 states and 1408 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:03:23,982 INFO L93 Difference]: Finished difference Result 2418 states and 3597 transitions. [2021-10-13 00:03:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:03:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 115 [2021-10-13 00:03:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:03:23,996 INFO L225 Difference]: With dead ends: 2418 [2021-10-13 00:03:23,996 INFO L226 Difference]: Without dead ends: 1650 [2021-10-13 00:03:23,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:03:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-10-13 00:03:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1052. [2021-10-13 00:03:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 1.5052331113225499) internal successors, (1582), 1051 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1582 transitions. [2021-10-13 00:03:24,065 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1582 transitions. Word has length 115 [2021-10-13 00:03:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:03:24,066 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1582 transitions. [2021-10-13 00:03:24,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1582 transitions. [2021-10-13 00:03:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-13 00:03:24,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:03:24,070 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:03:24,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:03:24,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:03:24,286 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:03:24,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:03:24,286 INFO L82 PathProgramCache]: Analyzing trace with hash -849536469, now seen corresponding path program 1 times [2021-10-13 00:03:24,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:03:24,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711296306] [2021-10-13 00:03:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:03:24,287 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:03:24,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:03:24,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:03:24,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 00:03:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:03:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:03:25,335 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:03:25,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:03:25,611 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:03:25,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:03:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:25,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:03:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:26,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:03:26,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711296306] [2021-10-13 00:03:26,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711296306] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:03:26,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:03:26,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:03:26,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917976563] [2021-10-13 00:03:26,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:03:26,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:03:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:03:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:03:26,433 INFO L87 Difference]: Start difference. First operand 1052 states and 1582 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:03:38,913 INFO L93 Difference]: Finished difference Result 2669 states and 3951 transitions. [2021-10-13 00:03:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:03:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 116 [2021-10-13 00:03:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:03:38,927 INFO L225 Difference]: With dead ends: 2669 [2021-10-13 00:03:38,927 INFO L226 Difference]: Without dead ends: 1627 [2021-10-13 00:03:38,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:03:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-10-13 00:03:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1052. [2021-10-13 00:03:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 1.4843006660323501) internal successors, (1560), 1051 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1560 transitions. [2021-10-13 00:03:39,005 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1560 transitions. Word has length 116 [2021-10-13 00:03:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:03:39,006 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1560 transitions. [2021-10-13 00:03:39,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1560 transitions. [2021-10-13 00:03:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-13 00:03:39,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:03:39,010 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:03:39,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:03:39,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:03:39,226 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:03:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:03:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash -710278962, now seen corresponding path program 1 times [2021-10-13 00:03:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:03:39,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706049571] [2021-10-13 00:03:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:03:39,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:03:39,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:03:39,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:03:39,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 00:03:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:40,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:03:40,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:03:40,263 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:03:40,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:03:40,640 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:03:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:03:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:40,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:03:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:41,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:03:41,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706049571] [2021-10-13 00:03:41,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706049571] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:03:41,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:03:41,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:03:41,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346912445] [2021-10-13 00:03:41,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:03:41,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:03:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:03:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:03:41,386 INFO L87 Difference]: Start difference. First operand 1052 states and 1560 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:03:54,096 INFO L93 Difference]: Finished difference Result 2492 states and 3661 transitions. [2021-10-13 00:03:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:03:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 116 [2021-10-13 00:03:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:03:54,107 INFO L225 Difference]: With dead ends: 2492 [2021-10-13 00:03:54,108 INFO L226 Difference]: Without dead ends: 1628 [2021-10-13 00:03:54,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:03:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-10-13 00:03:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1068. [2021-10-13 00:03:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4751640112464854) internal successors, (1574), 1067 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1574 transitions. [2021-10-13 00:03:54,190 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1574 transitions. Word has length 116 [2021-10-13 00:03:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:03:54,191 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1574 transitions. [2021-10-13 00:03:54,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:03:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1574 transitions. [2021-10-13 00:03:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-13 00:03:54,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:03:54,195 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:03:54,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:03:54,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:03:54,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:03:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:03:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1134529903, now seen corresponding path program 1 times [2021-10-13 00:03:54,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:03:54,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889706058] [2021-10-13 00:03:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:03:54,412 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:03:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:03:54,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:03:54,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 00:03:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:03:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:03:55,517 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:03:55,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:03:55,814 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:03:55,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:03:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:56,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:03:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:03:56,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:03:56,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889706058] [2021-10-13 00:03:56,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889706058] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:03:56,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:03:56,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:03:56,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932399223] [2021-10-13 00:03:56,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:03:56,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:03:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:03:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:03:56,569 INFO L87 Difference]: Start difference. First operand 1068 states and 1574 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:06,299 INFO L93 Difference]: Finished difference Result 2680 states and 3906 transitions. [2021-10-13 00:04:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:04:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 117 [2021-10-13 00:04:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:06,309 INFO L225 Difference]: With dead ends: 2680 [2021-10-13 00:04:06,309 INFO L226 Difference]: Without dead ends: 1627 [2021-10-13 00:04:06,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:04:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-10-13 00:04:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1068. [2021-10-13 00:04:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4545454545454546) internal successors, (1552), 1067 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1552 transitions. [2021-10-13 00:04:06,376 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1552 transitions. Word has length 117 [2021-10-13 00:04:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:06,377 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1552 transitions. [2021-10-13 00:04:06,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1552 transitions. [2021-10-13 00:04:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 00:04:06,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:06,381 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:06,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:04:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:04:06,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:04:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:04:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash 182595248, now seen corresponding path program 1 times [2021-10-13 00:04:06,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:04:06,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935346960] [2021-10-13 00:04:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:06,605 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:04:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:04:06,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:04:06,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 00:04:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:07,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:04:07,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:04:07,977 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:04:07,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:04:08,291 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:04:08,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:04:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:08,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:04:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:09,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:04:09,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935346960] [2021-10-13 00:04:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935346960] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:04:09,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:04:09,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:04:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115283396] [2021-10-13 00:04:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:04:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:04:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:04:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:04:09,069 INFO L87 Difference]: Start difference. First operand 1068 states and 1552 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:17,263 INFO L93 Difference]: Finished difference Result 2632 states and 3802 transitions. [2021-10-13 00:04:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:04:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 118 [2021-10-13 00:04:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:17,275 INFO L225 Difference]: With dead ends: 2632 [2021-10-13 00:04:17,275 INFO L226 Difference]: Without dead ends: 1579 [2021-10-13 00:04:17,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:04:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-10-13 00:04:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1068. [2021-10-13 00:04:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4329896907216495) internal successors, (1529), 1067 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1529 transitions. [2021-10-13 00:04:17,357 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1529 transitions. Word has length 118 [2021-10-13 00:04:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:17,357 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1529 transitions. [2021-10-13 00:04:17,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1529 transitions. [2021-10-13 00:04:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 00:04:17,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:17,361 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:17,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:04:17,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:04:17,582 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:04:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:04:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1828816845, now seen corresponding path program 1 times [2021-10-13 00:04:17,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:04:17,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046944649] [2021-10-13 00:04:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:17,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:04:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:04:17,584 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:04:17,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 00:04:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:04:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:04:18,809 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:04:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:04:19,178 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:04:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:04:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:19,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:04:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:19,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:04:19,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046944649] [2021-10-13 00:04:19,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046944649] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:04:19,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:04:19,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:04:19,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678406425] [2021-10-13 00:04:19,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:04:19,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:04:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:04:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:04:19,948 INFO L87 Difference]: Start difference. First operand 1068 states and 1529 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:29,234 INFO L93 Difference]: Finished difference Result 2732 states and 3892 transitions. [2021-10-13 00:04:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:04:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-10-13 00:04:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:29,247 INFO L225 Difference]: With dead ends: 2732 [2021-10-13 00:04:29,247 INFO L226 Difference]: Without dead ends: 1679 [2021-10-13 00:04:29,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:04:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-10-13 00:04:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1163. [2021-10-13 00:04:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.4139414802065404) internal successors, (1643), 1162 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1643 transitions. [2021-10-13 00:04:29,332 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1643 transitions. Word has length 118 [2021-10-13 00:04:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:29,333 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1643 transitions. [2021-10-13 00:04:29,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1643 transitions. [2021-10-13 00:04:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-13 00:04:29,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:29,337 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:29,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:04:29,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:04:29,557 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:04:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:04:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1012937024, now seen corresponding path program 1 times [2021-10-13 00:04:29,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:04:29,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211040927] [2021-10-13 00:04:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:29,559 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:04:29,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:04:29,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:04:29,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 00:04:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:04:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:04:31,131 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:04:31,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:04:31,620 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:04:31,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:04:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:04:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:32,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:04:32,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211040927] [2021-10-13 00:04:32,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211040927] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:04:32,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:04:32,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:04:32,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977609736] [2021-10-13 00:04:32,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:04:32,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:04:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:04:32,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:04:32,423 INFO L87 Difference]: Start difference. First operand 1163 states and 1643 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:41,075 INFO L93 Difference]: Finished difference Result 2786 states and 3936 transitions. [2021-10-13 00:04:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:04:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 119 [2021-10-13 00:04:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:41,084 INFO L225 Difference]: With dead ends: 2786 [2021-10-13 00:04:41,084 INFO L226 Difference]: Without dead ends: 1638 [2021-10-13 00:04:41,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:04:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-10-13 00:04:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1179. [2021-10-13 00:04:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.4125636672325976) internal successors, (1664), 1178 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1664 transitions. [2021-10-13 00:04:41,170 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1664 transitions. Word has length 119 [2021-10-13 00:04:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:41,171 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1664 transitions. [2021-10-13 00:04:41,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1664 transitions. [2021-10-13 00:04:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-13 00:04:41,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:41,175 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:41,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 00:04:41,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:04:41,396 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:04:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:04:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash 405159276, now seen corresponding path program 1 times [2021-10-13 00:04:41,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:04:41,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134294193] [2021-10-13 00:04:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:41,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:04:41,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:04:41,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:04:41,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 00:04:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:04:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:04:42,773 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:04:42,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 00:04:43,174 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:04:43,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-13 00:04:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:43,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:04:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 00:04:43,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:04:43,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134294193] [2021-10-13 00:04:43,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134294193] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:04:43,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:04:43,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:04:43,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092879039] [2021-10-13 00:04:43,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:04:43,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:04:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:04:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:04:43,952 INFO L87 Difference]: Start difference. First operand 1179 states and 1664 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:55,451 INFO L93 Difference]: Finished difference Result 2780 states and 3917 transitions. [2021-10-13 00:04:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:04:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-13 00:04:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:55,460 INFO L225 Difference]: With dead ends: 2780 [2021-10-13 00:04:55,460 INFO L226 Difference]: Without dead ends: 1616 [2021-10-13 00:04:55,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:04:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-10-13 00:04:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1179. [2021-10-13 00:04:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.3989813242784381) internal successors, (1648), 1178 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1648 transitions. [2021-10-13 00:04:55,549 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1648 transitions. Word has length 119 [2021-10-13 00:04:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:55,549 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1648 transitions. [2021-10-13 00:04:55,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:04:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1648 transitions. [2021-10-13 00:04:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-13 00:04:55,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:55,553 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:55,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:04:55,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:04:55,768 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:04:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:04:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1820752595, now seen corresponding path program 1 times [2021-10-13 00:04:55,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:04:55,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636509487] [2021-10-13 00:04:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:55,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:04:55,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:04:55,771 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:04:55,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 00:04:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:04:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:04:57,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:04:57,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:04:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:04:57,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-10-13 00:04:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:04:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:04:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:04:57,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:04:57,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 34 [2021-10-13 00:04:57,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:04:57,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 00:04:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-13 00:04:58,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:04:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-13 00:04:59,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:04:59,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636509487] [2021-10-13 00:04:59,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636509487] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:04:59,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:04:59,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 00:04:59,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835048007] [2021-10-13 00:04:59,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:04:59,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:04:59,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:04:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:04:59,153 INFO L87 Difference]: Start difference. First operand 1179 states and 1648 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-10-13 00:05:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:02,927 INFO L93 Difference]: Finished difference Result 2344 states and 3275 transitions. [2021-10-13 00:05:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:05:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 122 [2021-10-13 00:05:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:02,936 INFO L225 Difference]: With dead ends: 2344 [2021-10-13 00:05:02,937 INFO L226 Difference]: Without dead ends: 1175 [2021-10-13 00:05:02,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:05:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-10-13 00:05:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1174. [2021-10-13 00:05:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.3981244671781756) internal successors, (1640), 1173 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:05:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1640 transitions. [2021-10-13 00:05:03,018 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1640 transitions. Word has length 122 [2021-10-13 00:05:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:03,018 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1640 transitions. [2021-10-13 00:05:03,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-10-13 00:05:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1640 transitions. [2021-10-13 00:05:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-13 00:05:03,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:03,023 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:03,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:03,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:05:03,237 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:05:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-13 00:05:03,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:05:03,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244141563] [2021-10-13 00:05:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:03,239 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:05:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:05:03,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:05:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 00:05:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:05,507 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:07,484 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-13 00:05:07,484 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:05:07,485 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:05:07,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:07,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:05:07,716 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:05:07,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:05:07 BoogieIcfgContainer [2021-10-13 00:05:07,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:05:07,946 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:05:07,946 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:05:07,946 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:05:07,947 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:57" (3/4) ... [2021-10-13 00:05:07,949 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:05:08,119 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:05:08,119 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:05:08,120 INFO L168 Benchmark]: Toolchain (without parser) took 196195.57 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 40.3 MB in the beginning and 25.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 46.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,121 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 62.9 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:08,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 838.77 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 40.0 MB in the beginning and 55.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.83 ms. Allocated memory is still 77.6 MB. Free memory was 55.1 MB in the beginning and 50.6 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,127 INFO L168 Benchmark]: Boogie Preprocessor took 99.17 ms. Allocated memory is still 77.6 MB. Free memory was 50.6 MB in the beginning and 43.9 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,127 INFO L168 Benchmark]: RCFGBuilder took 4594.51 ms. Allocated memory is still 77.6 MB. Free memory was 43.9 MB in the beginning and 35.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,128 INFO L168 Benchmark]: TraceAbstraction took 190377.35 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 34.3 MB in the beginning and 41.3 MB in the end (delta: -7.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,128 INFO L168 Benchmark]: Witness Printer took 173.59 ms. Allocated memory is still 94.4 MB. Free memory was 41.3 MB in the beginning and 25.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:08,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 62.9 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 838.77 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 40.0 MB in the beginning and 55.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 103.83 ms. Allocated memory is still 77.6 MB. Free memory was 55.1 MB in the beginning and 50.6 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 99.17 ms. Allocated memory is still 77.6 MB. Free memory was 50.6 MB in the beginning and 43.9 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4594.51 ms. Allocated memory is still 77.6 MB. Free memory was 43.9 MB in the beginning and 35.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 190377.35 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 34.3 MB in the beginning and 41.3 MB in the end (delta: -7.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. * Witness Printer took 173.59 ms. Allocated memory is still 94.4 MB. Free memory was 41.3 MB in the beginning and 25.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1658]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={-2147483569:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 190086.4ms, OverallIterations: 17, TraceHistogramMax: 7, EmptinessCheckTime: 79.2ms, AutomataDifference: 147285.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2979 SDtfs, 2714 SDslu, 6551 SDs, 0 SdLazy, 5444 SolverSat, 575 SolverUnsat, 36 SolverUnknown, 0 SolverNotchecked, 136974.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3262 GetRequests, 3179 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 3249.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1179occurred in iteration=14, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1141.0ms AutomataMinimizationTime, 16 MinimizatonAttempts, 6547 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 703.8ms SsaConstructionTime, 6568.6ms SatisfiabilityAnalysisTime, 21618.0ms InterpolantComputationTime, 1772 NumberOfCodeBlocks, 1772 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3238 ConstructedInterpolants, 5 QuantifiedInterpolants, 7532 SizeOfPredicates, 78 NumberOfNonLiveVariables, 4749 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 32 InterpolantComputations, 32 PerfectInterpolantSequences, 4372/4372 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 00:05:08,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc1d444-ae14-4168-a50e-76fb1bfd459b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...