./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/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_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 279a162aa90145a7316b3266460570a8e3cad8e6 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/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_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 279a162aa90145a7316b3266460570a8e3cad8e6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:05:49,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:05:49,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:05:49,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:05:49,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:05:49,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:05:49,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:05:49,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:05:49,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:05:49,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:05:49,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:05:49,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:05:49,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:05:49,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:05:49,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:05:49,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:05:49,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:05:49,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:05:49,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:05:49,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:05:49,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:05:49,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:05:49,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:05:49,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:05:49,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:05:49,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:05:49,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:05:49,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:05:49,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:05:49,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:05:49,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:05:49,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:05:49,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:05:49,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:05:49,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:05:49,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:05:49,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:05:49,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:05:49,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:05:49,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:05:49,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:05:49,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:05:49,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:05:49,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:05:49,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:05:49,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:05:49,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:05:49,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:05:49,742 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:05:49,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:05:49,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:05:49,743 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:05:49,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:05:49,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:05:49,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:05:49,744 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:05:49,745 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:05:49,745 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:05:49,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:05:49,745 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:05:49,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:05:49,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:05:49,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:05:49,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:05:49,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:05:49,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:05:49,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:05:49,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:05:49,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:05:49,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:05:49,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:05:49,748 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_5a85f201-a2a8-4259-97b6-4387d93c6634/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-10-13 00:05:50,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:05:50,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:05:50,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:05:50,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:05:50,046 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:05:50,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 00:05:50,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/cf543e0e9/9ed95fd27203474e9df4c63d22e3bb27/FLAG8009e8531 [2021-10-13 00:05:50,774 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:05:50,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 00:05:50,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/cf543e0e9/9ed95fd27203474e9df4c63d22e3bb27/FLAG8009e8531 [2021-10-13 00:05:51,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/cf543e0e9/9ed95fd27203474e9df4c63d22e3bb27 [2021-10-13 00:05:51,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:05:51,033 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:05:51,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:05:51,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:05:51,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:05:51,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2275005b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51, skipping insertion in model container [2021-10-13 00:05:51,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:05:51,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:05:51,436 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_5a85f201-a2a8-4259-97b6-4387d93c6634/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 00:05:51,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:05:51,450 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:05:51,515 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_5a85f201-a2a8-4259-97b6-4387d93c6634/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 00:05:51,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:05:51,563 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:05:51,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51 WrapperNode [2021-10-13 00:05:51,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:05:51,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:05:51,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:05:51,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:05:51,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:05:51,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:05:51,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:05:51,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:05:51,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (1/1) ... [2021-10-13 00:05:51,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:05:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:51,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:51,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:05:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:05:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:05:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:05:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:05:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:05:51,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 00:05:51,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 00:05:51,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 00:05:51,785 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-13 00:05:51,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:05:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:05:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:05:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:05:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:05:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:05:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:05:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:05:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:05:51,787 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:05:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:05:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:05:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:05:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:05:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 00:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 00:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 00:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:05:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:05:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:05:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:05:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:05:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:05:51,795 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:05:51,795 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:05:51,795 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:05:51,795 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:05:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:05:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:05:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:05:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:05:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:05:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:05:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:05:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:05:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:05:51,798 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:05:51,798 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:05:51,799 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:05:51,799 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:05:51,800 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:05:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:05:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:05:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:05:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:05:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:05:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:05:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:05:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:05:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:05:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:05:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:05:51,803 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:05:51,803 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:05:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:05:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:05:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:05:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:05:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:05:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:05:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:05:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:05:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:05:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:05:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:05:51,806 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:05:51,806 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:05:51,806 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:05:51,806 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:05:51,806 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:05:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:05:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:05:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:05:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:05:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:05:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:05:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:05:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:05:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:05:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:05:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:05:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:05:51,813 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:05:51,813 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:05:51,813 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:05:51,813 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:05:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-13 00:05:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:05:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:05:51,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:05:51,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:05:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:05:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:05:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:05:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:05:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:05:51,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:05:52,172 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-13 00:05:52,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:05:52,378 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 00:05:52,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:52 BoogieIcfgContainer [2021-10-13 00:05:52,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:05:52,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:05:52,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:05:52,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:05:52,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:05:51" (1/3) ... [2021-10-13 00:05:52,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ae6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:05:52, skipping insertion in model container [2021-10-13 00:05:52,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:51" (2/3) ... [2021-10-13 00:05:52,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ae6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:05:52, skipping insertion in model container [2021-10-13 00:05:52,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:52" (3/3) ... [2021-10-13 00:05:52,390 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-13 00:05:52,396 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:05:52,396 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-13 00:05:52,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:05:52,453 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:05:52,453 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-13 00:05:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:05:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:05:52,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:52,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:52,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1752578520, now seen corresponding path program 1 times [2021-10-13 00:05:52,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:52,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666979182] [2021-10-13 00:05:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:52,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:52,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:52,711 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 00:05:52,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:52,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666979182] [2021-10-13 00:05:52,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666979182] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:52,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:52,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:05:52,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543145484] [2021-10-13 00:05:52,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:05:52,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:05:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:05:52,738 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:52,906 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-10-13 00:05:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:05:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 00:05:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:52,922 INFO L225 Difference]: With dead ends: 50 [2021-10-13 00:05:52,922 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:05:52,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:05:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:05:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-13 00:05:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-10-13 00:05:52,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2021-10-13 00:05:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:52,961 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-10-13 00:05:52,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-10-13 00:05:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:05:52,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:52,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:52,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:05:52,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:52,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1503990498, now seen corresponding path program 1 times [2021-10-13 00:05:52,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:52,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852937772] [2021-10-13 00:05:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:52,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:53,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:53,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852937772] [2021-10-13 00:05:53,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852937772] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:53,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:53,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:05:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17842985] [2021-10-13 00:05:53,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:05:53,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:53,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:05:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:05:53,076 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:53,163 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-13 00:05:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:05:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 00:05:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:53,166 INFO L225 Difference]: With dead ends: 40 [2021-10-13 00:05:53,166 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 00:05:53,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:05:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 00:05:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-10-13 00:05:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-13 00:05:53,173 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 10 [2021-10-13 00:05:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-13 00:05:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-13 00:05:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:05:53,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:53,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:53,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:05:53,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1503991813, now seen corresponding path program 1 times [2021-10-13 00:05:53,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:53,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292840412] [2021-10-13 00:05:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:53,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,269 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 00:05:53,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:53,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292840412] [2021-10-13 00:05:53,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292840412] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:53,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:53,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:05:53,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324598624] [2021-10-13 00:05:53,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:05:53,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:05:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:05:53,274 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:53,338 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-13 00:05:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:05:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 00:05:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:53,340 INFO L225 Difference]: With dead ends: 29 [2021-10-13 00:05:53,340 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:05:53,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:05:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:05:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:05:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-13 00:05:53,345 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2021-10-13 00:05:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:53,346 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-13 00:05:53,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-13 00:05:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:05:53,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:53,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:53,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:05:53,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1503991814, now seen corresponding path program 1 times [2021-10-13 00:05:53,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:53,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468856583] [2021-10-13 00:05:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:53,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,431 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 00:05:53,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:53,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468856583] [2021-10-13 00:05:53,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468856583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:53,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:53,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:05:53,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766716717] [2021-10-13 00:05:53,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:05:53,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:53,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:05:53,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:05:53,435 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:53,487 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-13 00:05:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:05:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 00:05:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:53,489 INFO L225 Difference]: With dead ends: 27 [2021-10-13 00:05:53,489 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:05:53,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:05:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:05:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 00:05:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 00:05:53,494 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2021-10-13 00:05:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:53,495 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 00:05:53,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 00:05:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:05:53,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:53,497 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:53,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:05:53,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629249, now seen corresponding path program 1 times [2021-10-13 00:05:53,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:53,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552213875] [2021-10-13 00:05:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:53,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:53,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:53,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552213875] [2021-10-13 00:05:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552213875] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:53,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:53,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:05:53,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666463969] [2021-10-13 00:05:53,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:05:53,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:05:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:05:53,593 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:53,691 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-10-13 00:05:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:05:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:05:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:53,694 INFO L225 Difference]: With dead ends: 42 [2021-10-13 00:05:53,694 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:05:53,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:05:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:05:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-10-13 00:05:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 00:05:53,702 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-10-13 00:05:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:53,703 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 00:05:53,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 00:05:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:05:53,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:53,704 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:53,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:05:53,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:53,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629292, now seen corresponding path program 1 times [2021-10-13 00:05:53,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:53,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545282167] [2021-10-13 00:05:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:53,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:53,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:53,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545282167] [2021-10-13 00:05:53,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545282167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:53,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:53,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:05:53,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428892578] [2021-10-13 00:05:53,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:05:53,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:05:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:05:53,850 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:53,961 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-10-13 00:05:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:05:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:05:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:53,963 INFO L225 Difference]: With dead ends: 33 [2021-10-13 00:05:53,963 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 00:05:53,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:05:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 00:05:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-13 00:05:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-13 00:05:53,967 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-10-13 00:05:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:53,968 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-13 00:05:53,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-13 00:05:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:05:53,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:53,969 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:53,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:05:53,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629293, now seen corresponding path program 1 times [2021-10-13 00:05:53,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:53,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272582405] [2021-10-13 00:05:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:53,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:54,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272582405] [2021-10-13 00:05:54,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272582405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:54,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:05:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267205877] [2021-10-13 00:05:54,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:05:54,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:05:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:05:54,113 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:54,222 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-13 00:05:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:05:54,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:05:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:54,226 INFO L225 Difference]: With dead ends: 37 [2021-10-13 00:05:54,226 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 00:05:54,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:05:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 00:05:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-13 00:05:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-13 00:05:54,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-10-13 00:05:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:54,239 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-13 00:05:54,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-13 00:05:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:05:54,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:54,241 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:54,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:05:54,241 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2029074739, now seen corresponding path program 1 times [2021-10-13 00:05:54,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:54,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818255047] [2021-10-13 00:05:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:54,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:54,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:54,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:54,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818255047] [2021-10-13 00:05:54,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818255047] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:54,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:54,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:05:54,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813263584] [2021-10-13 00:05:54,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:05:54,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:05:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:05:54,379 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:54,499 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-13 00:05:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:05:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-13 00:05:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:54,501 INFO L225 Difference]: With dead ends: 34 [2021-10-13 00:05:54,501 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 00:05:54,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:05:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 00:05:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-13 00:05:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-13 00:05:54,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-10-13 00:05:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:54,506 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-13 00:05:54,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-13 00:05:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:05:54,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:05:54,508 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:54,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:05:54,508 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:05:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -790989135, now seen corresponding path program 1 times [2021-10-13 00:05:54,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:54,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274647327] [2021-10-13 00:05:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:54,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:54,527 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:54,570 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:54,570 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:05:54,571 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:05:54,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:05:54,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:05:54,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:05:54,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:05:54,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:05:54,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:05:54,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:05:54,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:05:54,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:05:54,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:05:54,582 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:05:54,591 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 00:05:54,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:05:54 BoogieIcfgContainer [2021-10-13 00:05:54,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:05:54,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:05:54,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:05:54,606 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:05:54,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:52" (3/4) ... [2021-10-13 00:05:54,609 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:05:54,610 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:05:54,611 INFO L168 Benchmark]: Toolchain (without parser) took 3577.43 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 70.0 MB in the beginning and 71.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:54,612 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 111.1 MB. Free memory was 88.0 MB in the beginning and 87.9 MB in the end (delta: 78.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:54,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 531.51 ms. Allocated memory is still 111.1 MB. Free memory was 69.8 MB in the beginning and 80.4 MB in the end (delta: -10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:54,613 INFO L168 Benchmark]: Boogie Preprocessor took 119.47 ms. Allocated memory is still 111.1 MB. Free memory was 80.4 MB in the beginning and 78.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:54,614 INFO L168 Benchmark]: RCFGBuilder took 692.53 ms. Allocated memory is still 111.1 MB. Free memory was 77.7 MB in the beginning and 58.6 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:54,614 INFO L168 Benchmark]: TraceAbstraction took 2222.62 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 58.0 MB in the beginning and 72.3 MB in the end (delta: -14.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:54,615 INFO L168 Benchmark]: Witness Printer took 4.28 ms. Allocated memory is still 134.2 MB. Free memory was 72.3 MB in the beginning and 71.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:54,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 111.1 MB. Free memory was 88.0 MB in the beginning and 87.9 MB in the end (delta: 78.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 531.51 ms. Allocated memory is still 111.1 MB. Free memory was 69.8 MB in the beginning and 80.4 MB in the end (delta: -10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 119.47 ms. Allocated memory is still 111.1 MB. Free memory was 80.4 MB in the beginning and 78.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 692.53 ms. Allocated memory is still 111.1 MB. Free memory was 77.7 MB in the beginning and 58.6 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2222.62 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 58.0 MB in the beginning and 72.3 MB in the end (delta: -14.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.28 ms. Allocated memory is still 134.2 MB. Free memory was 72.3 MB in the beginning and 71.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * 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: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [p={0:0}, t={-1:0}] [L538] t->n = p VAL [p={0:0}, t={-1:0}] [L539] p = t VAL [p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={-1:0}, p->n={0:0}, t={-1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 54 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 2135.9ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 18.2ms, AutomataDifference: 880.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 151 SDtfs, 202 SDslu, 103 SDs, 0 SdLazy, 402 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 499.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 278.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 60.7ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.9ms SsaConstructionTime, 160.8ms SatisfiabilityAnalysisTime, 685.4ms InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 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 00:05:54,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/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 00:05:57,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:05:57,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:05:57,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:05:57,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:05:57,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:05:57,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:05:57,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:05:57,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:05:57,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:05:57,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:05:57,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:05:57,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:05:57,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:05:57,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:05:57,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:05:57,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:05:57,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:05:57,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:05:57,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:05:57,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:05:57,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:05:57,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:05:57,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:05:57,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:05:57,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:05:57,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:05:57,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:05:57,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:05:57,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:05:57,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:05:57,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:05:57,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:05:57,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:05:57,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:05:57,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:05:57,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:05:57,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:05:57,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:05:57,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:05:57,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:05:57,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 00:05:57,572 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:05:57,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:05:57,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:05:57,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:05:57,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:05:57,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:05:57,577 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:05:57,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:05:57,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:05:57,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:05:57,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:05:57,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:05:57,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:05:57,579 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:05:57,580 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:05:57,580 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:05:57,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:05:57,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:05:57,581 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:05:57,581 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:05:57,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:05:57,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:05:57,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:05:57,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:05:57,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:05:57,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:05:57,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:05:57,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:05:57,584 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:05:57,584 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:05:57,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:05:57,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:05:57,585 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_5a85f201-a2a8-4259-97b6-4387d93c6634/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-10-13 00:05:58,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:05:58,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:05:58,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:05:58,070 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:05:58,072 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:05:58,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 00:05:58,163 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/c350c63a2/adb777e8da1c4ce48c7956b530a2bcf7/FLAGfda4c7917 [2021-10-13 00:05:58,950 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:05:58,951 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 00:05:58,971 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/c350c63a2/adb777e8da1c4ce48c7956b530a2bcf7/FLAGfda4c7917 [2021-10-13 00:05:59,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/data/c350c63a2/adb777e8da1c4ce48c7956b530a2bcf7 [2021-10-13 00:05:59,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:05:59,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:05:59,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:05:59,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:05:59,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:05:59,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29796bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59, skipping insertion in model container [2021-10-13 00:05:59,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:05:59,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:05:59,648 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_5a85f201-a2a8-4259-97b6-4387d93c6634/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 00:05:59,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:05:59,665 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:05:59,709 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_5a85f201-a2a8-4259-97b6-4387d93c6634/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 00:05:59,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:05:59,755 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:05:59,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59 WrapperNode [2021-10-13 00:05:59,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:05:59,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:05:59,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:05:59,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:05:59,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:05:59,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:05:59,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:05:59,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:05:59,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (1/1) ... [2021-10-13 00:05:59,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:05:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:59,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:59,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:05:59,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:05:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:05:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 00:05:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:05:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:05:59,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:05:59,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 00:05:59,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 00:05:59,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 00:05:59,943 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-13 00:05:59,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:05:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:05:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:05:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:05:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:05:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:05:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:05:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:05:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:05:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:05:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:05:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:05:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:05:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:05:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:05:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:05:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:05:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:05:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:05:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:05:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:05:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:05:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:05:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:05:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:05:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:05:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 00:05:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 00:05:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 00:05:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:05:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:05:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:05:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:05:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:05:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:05:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:05:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:05:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:05:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:05:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:05:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:05:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:05:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:05:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:05:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:05:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:05:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:05:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:05:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:05:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:05:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:05:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:05:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:05:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:05:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:05:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:05:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:05:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:05:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:05:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:05:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:05:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:05:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:05:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:05:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:05:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:05:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:05:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:05:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:05:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:05:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:05:59,958 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:05:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:05:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:05:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:05:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:05:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:05:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:05:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:05:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:05:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:05:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:05:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:05:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:05:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:05:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:05:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:05:59,962 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:05:59,962 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:05:59,962 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:05:59,962 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:05:59,962 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:05:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:05:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:05:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:05:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:05:59,964 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:05:59,964 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:05:59,964 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:05:59,964 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:05:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:05:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:05:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:05:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:05:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:05:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:05:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:05:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:05:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:05:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:05:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:05:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:05:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:05:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:05:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-13 00:05:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:05:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:05:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 00:05:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:05:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:05:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:05:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:05:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:05:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:05:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 00:05:59,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 00:05:59,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 00:05:59,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:06:00,290 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-13 00:06:00,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:06:00,501 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 00:06:00,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:06:00 BoogieIcfgContainer [2021-10-13 00:06:00,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:06:00,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:06:00,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:06:00,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:06:00,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:05:59" (1/3) ... [2021-10-13 00:06:00,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47939a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:06:00, skipping insertion in model container [2021-10-13 00:06:00,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:59" (2/3) ... [2021-10-13 00:06:00,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47939a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:06:00, skipping insertion in model container [2021-10-13 00:06:00,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:06:00" (3/3) ... [2021-10-13 00:06:00,517 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-13 00:06:00,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:06:00,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-13 00:06:00,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:06:00,602 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:06:00,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-13 00:06:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:06:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:06:00,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:00,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:00,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1599181994, now seen corresponding path program 1 times [2021-10-13 00:06:00,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:00,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993707345] [2021-10-13 00:06:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:00,662 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:00,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:00,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:00,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:06:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:06:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:00,963 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 00:06:00,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:01,015 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 00:06:01,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:01,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993707345] [2021-10-13 00:06:01,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993707345] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:01,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:01,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:06:01,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635598045] [2021-10-13 00:06:01,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:06:01,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:06:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:06:01,068 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:01,187 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-10-13 00:06:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:06:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 00:06:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:01,198 INFO L225 Difference]: With dead ends: 47 [2021-10-13 00:06:01,198 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 00:06:01,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:06:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 00:06:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-13 00:06:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-10-13 00:06:01,236 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 9 [2021-10-13 00:06:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:01,236 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-10-13 00:06:01,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-10-13 00:06:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:06:01,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:01,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:01,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:01,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:01,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:01,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1599182037, now seen corresponding path program 1 times [2021-10-13 00:06:01,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:01,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219433620] [2021-10-13 00:06:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:01,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:01,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:01,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:06:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:01,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:06:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:01,700 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 00:06:01,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:01,810 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 00:06:01,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:01,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219433620] [2021-10-13 00:06:01,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219433620] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:01,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:01,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 00:06:01,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889613073] [2021-10-13 00:06:01,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:06:01,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:06:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:06:01,814 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:01,869 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-10-13 00:06:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:06:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 00:06:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:01,871 INFO L225 Difference]: With dead ends: 38 [2021-10-13 00:06:01,871 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 00:06:01,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:06:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 00:06:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-13 00:06:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.6875) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-13 00:06:01,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2021-10-13 00:06:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:01,878 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-13 00:06:01,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-13 00:06:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:06:01,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:01,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:01,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:02,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1599183352, now seen corresponding path program 1 times [2021-10-13 00:06:02,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:02,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885567876] [2021-10-13 00:06:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:02,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:02,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:02,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:06:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:06:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:02,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:06:02,363 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 00:06:02,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:02,402 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 00:06:02,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:02,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885567876] [2021-10-13 00:06:02,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885567876] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:02,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:02,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:06:02,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23281754] [2021-10-13 00:06:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:06:02,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:06:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:06:02,406 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:02,463 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-13 00:06:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:06:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 00:06:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:02,465 INFO L225 Difference]: With dead ends: 27 [2021-10-13 00:06:02,465 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:06:02,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:06:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:06:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 00:06:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.5625) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 00:06:02,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2021-10-13 00:06:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:02,471 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 00:06:02,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 00:06:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:06:02,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:02,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:02,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:02,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:02,683 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1599183353, now seen corresponding path program 1 times [2021-10-13 00:06:02,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:02,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899809633] [2021-10-13 00:06:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:02,685 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:02,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:02,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:06:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:06:02,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:06:02,933 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 00:06:02,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:03,034 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 00:06:03,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:03,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899809633] [2021-10-13 00:06:03,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899809633] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:03,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:03,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 00:06:03,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399831261] [2021-10-13 00:06:03,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:06:03,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:06:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:06:03,038 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:03,100 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-13 00:06:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:06:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 00:06:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:03,104 INFO L225 Difference]: With dead ends: 25 [2021-10-13 00:06:03,104 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 00:06:03,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:06:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 00:06:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-13 00:06:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-13 00:06:03,108 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2021-10-13 00:06:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:03,109 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-13 00:06:03,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-13 00:06:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:06:03,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:03,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:03,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:03,320 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042382, now seen corresponding path program 1 times [2021-10-13 00:06:03,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:03,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672201477] [2021-10-13 00:06:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:03,322 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:03,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:03,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:06:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:06:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:03,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:03,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:03,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672201477] [2021-10-13 00:06:03,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672201477] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:03,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:03,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 00:06:03,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797643553] [2021-10-13 00:06:03,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:06:03,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:06:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:06:03,652 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:03,780 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-13 00:06:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:06:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-13 00:06:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:03,782 INFO L225 Difference]: With dead ends: 40 [2021-10-13 00:06:03,782 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 00:06:03,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:06:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 00:06:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-10-13 00:06:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-13 00:06:03,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2021-10-13 00:06:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:03,787 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-13 00:06:03,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-13 00:06:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:06:03,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:03,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:03,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:04,003 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042425, now seen corresponding path program 1 times [2021-10-13 00:06:04,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:04,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58901102] [2021-10-13 00:06:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:04,004 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:04,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:04,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:04,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:06:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:06:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:04,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:06:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:04,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:04,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58901102] [2021-10-13 00:06:04,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58901102] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:04,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:04,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 00:06:04,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747020264] [2021-10-13 00:06:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:06:04,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:06:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:06:04,339 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:04,471 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-13 00:06:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:06:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-13 00:06:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:04,473 INFO L225 Difference]: With dead ends: 31 [2021-10-13 00:06:04,473 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 00:06:04,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:06:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 00:06:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-13 00:06:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-13 00:06:04,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-10-13 00:06:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:04,478 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-13 00:06:04,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-13 00:06:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:06:04,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:04,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:04,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:04,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:04,690 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:04,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042426, now seen corresponding path program 1 times [2021-10-13 00:06:04,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:04,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159180660] [2021-10-13 00:06:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:04,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:04,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:04,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 00:06:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:06:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:04,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:06:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:05,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:05,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159180660] [2021-10-13 00:06:05,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159180660] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:05,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:05,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 00:06:05,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618234721] [2021-10-13 00:06:05,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:06:05,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:06:05,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:06:05,216 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:05,443 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-13 00:06:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:06:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-13 00:06:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:05,445 INFO L225 Difference]: With dead ends: 35 [2021-10-13 00:06:05,445 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 00:06:05,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:06:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 00:06:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-13 00:06:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-13 00:06:05,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-10-13 00:06:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:05,451 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-13 00:06:05,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-13 00:06:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:06:05,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:05,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:05,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:05,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:05,661 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:05,662 INFO L82 PathProgramCache]: Analyzing trace with hash 52831098, now seen corresponding path program 1 times [2021-10-13 00:06:05,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:05,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728839686] [2021-10-13 00:06:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:05,662 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:05,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:05,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 00:06:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:06:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:06:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:06:05,918 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 11 treesize of output 7 [2021-10-13 00:06:05,965 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 00:06:05,966 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 27 treesize of output 11 [2021-10-13 00:06:06,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:06:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:06,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:06:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:06:06,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:06:06,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728839686] [2021-10-13 00:06:06,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728839686] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:06:06,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:06:06,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 00:06:06,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030123705] [2021-10-13 00:06:06,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:06:06,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:06:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:06:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:06:06,134 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:06:06,307 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-13 00:06:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:06:06,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:06:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:06:06,310 INFO L225 Difference]: With dead ends: 32 [2021-10-13 00:06:06,310 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 00:06:06,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:06:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 00:06:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-13 00:06:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.3) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 00:06:06,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-10-13 00:06:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:06:06,325 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 00:06:06,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:06:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 00:06:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:06:06,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:06:06,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:06:06,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 00:06:06,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:06,528 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-13 00:06:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:06:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1938067545, now seen corresponding path program 1 times [2021-10-13 00:06:06,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:06:06,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450225850] [2021-10-13 00:06:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:06:06,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:06:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:06:06,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:06:06,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 00:06:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:06:06,730 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:06:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:06:06,822 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-13 00:06:06,823 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:06:06,827 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:06:06,829 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:06:06,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:06:06,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:06:06,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:06:06,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:06:06,830 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:06:06,831 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:06:06,831 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:06:06,831 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:06:06,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:06:07,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:06:07,038 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:06:07,048 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 00:06:07,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:06:07 BoogieIcfgContainer [2021-10-13 00:06:07,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:06:07,073 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:06:07,073 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:06:07,074 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:06:07,074 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:06:00" (3/4) ... [2021-10-13 00:06:07,080 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:06:07,080 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:06:07,083 INFO L168 Benchmark]: Toolchain (without parser) took 7903.62 ms. Allocated memory was 65.0 MB in the beginning and 109.1 MB in the end (delta: 44.0 MB). Free memory was 43.4 MB in the beginning and 74.1 MB in the end (delta: -30.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:06:07,083 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 65.0 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:06:07,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 577.07 ms. Allocated memory is still 65.0 MB. Free memory was 43.1 MB in the beginning and 40.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:06:07,084 INFO L168 Benchmark]: Boogie Preprocessor took 87.89 ms. Allocated memory is still 65.0 MB. Free memory was 40.2 MB in the beginning and 37.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:06:07,085 INFO L168 Benchmark]: RCFGBuilder took 659.34 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 37.1 MB in the beginning and 60.3 MB in the end (delta: -23.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:06:07,086 INFO L168 Benchmark]: TraceAbstraction took 6564.89 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 59.5 MB in the beginning and 75.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:06:07,088 INFO L168 Benchmark]: Witness Printer took 7.06 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 74.1 MB in the end (delta: 898.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:06:07,090 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 65.0 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 577.07 ms. Allocated memory is still 65.0 MB. Free memory was 43.1 MB in the beginning and 40.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 87.89 ms. Allocated memory is still 65.0 MB. Free memory was 40.2 MB in the beginning and 37.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 659.34 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 37.1 MB in the beginning and 60.3 MB in the end (delta: -23.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6564.89 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 59.5 MB in the beginning and 75.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. * Witness Printer took 7.06 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 74.1 MB in the end (delta: 898.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * 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: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={1:0}] [L537] t->h = 1 VAL [p={0:0}, t={1:0}] [L538] t->n = p VAL [p={0:0}, t={1:0}] [L539] p = t VAL [p={1:0}, t={1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={1:0}, t={1:0}] [L542] EXPR p->h VAL [p={1:0}, p->h=1, t={1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={1:0}, p->n={0:0}, t={1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 59 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 6447.1ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 29.4ms, AutomataDifference: 1013.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 153 SDtfs, 203 SDslu, 118 SDs, 0 SdLazy, 193 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 632.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 277.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.3ms SsaConstructionTime, 301.2ms SatisfiabilityAnalysisTime, 1681.8ms InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 648 SizeOfPredicates, 9 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 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 00:06:07,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a85f201-a2a8-4259-97b6-4387d93c6634/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...