./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3 --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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3 --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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:07:54,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:07:54,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:07:54,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:07:54,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:07:54,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:07:54,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:07:54,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:07:54,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:07:54,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:07:54,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:07:54,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:07:54,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:07:54,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:07:54,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:07:54,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:07:54,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:07:54,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:07:54,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:07:54,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:07:54,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:07:54,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:07:54,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:07:54,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:07:54,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:07:54,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:07:54,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:07:54,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:07:54,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:07:54,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:07:54,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:07:54,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:07:54,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:07:54,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:07:54,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:07:54,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:07:54,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:07:54,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:07:54,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:07:54,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:07:54,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:07:54,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 20:07:54,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:07:54,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:07:54,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:07:54,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:07:54,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:07:54,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:07:54,736 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:07:54,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:07:54,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:07:54,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 20:07:54,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:07:54,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:07:54,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:07:54,739 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 20:07:54,739 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 20:07:54,739 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 20:07:54,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:07:54,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 20:07:54,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:07:54,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:07:54,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:07:54,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:07:54,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:07:54,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:07:54,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:07:54,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:07:54,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:07:54,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:07:54,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:07:54,743 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_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2021-10-15 20:07:55,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:07:55,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:07:55,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:07:55,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:07:55,067 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:07:55,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-15 20:07:55,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/a9ef01a1d/a2a299176046417f84eb88b9577c5155/FLAGf10cc4bc1 [2021-10-15 20:07:55,751 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:07:55,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-15 20:07:55,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/a9ef01a1d/a2a299176046417f84eb88b9577c5155/FLAGf10cc4bc1 [2021-10-15 20:07:56,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/a9ef01a1d/a2a299176046417f84eb88b9577c5155 [2021-10-15 20:07:56,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:07:56,131 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 20:07:56,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:07:56,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:07:56,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:07:56,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420d0fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56, skipping insertion in model container [2021-10-15 20:07:56,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:07:56,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:07:56,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:07:56,543 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:07:56,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:07:56,611 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:07:56,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56 WrapperNode [2021-10-15 20:07:56,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:07:56,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:07:56,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:07:56,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:07:56,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:07:56,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:07:56,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:07:56,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:07:56,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (1/1) ... [2021-10-15 20:07:56,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:07:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:56,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:07:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:07:56,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 20:07:56,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:07:56,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 20:07:56,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 20:07:56,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 20:07:56,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 20:07:56,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 20:07:56,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 20:07:56,826 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-15 20:07:56,826 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-15 20:07:56,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 20:07:56,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 20:07:56,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 20:07:56,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 20:07:56,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 20:07:56,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 20:07:56,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:07:56,828 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 20:07:56,828 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 20:07:56,828 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 20:07:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 20:07:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 20:07:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 20:07:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 20:07:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 20:07:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 20:07:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 20:07:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 20:07:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 20:07:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 20:07:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 20:07:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 20:07:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 20:07:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 20:07:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 20:07:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 20:07:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 20:07:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 20:07:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 20:07:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 20:07:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 20:07:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 20:07:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 20:07:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 20:07:56,833 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 20:07:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 20:07:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 20:07:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 20:07:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 20:07:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 20:07:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 20:07:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 20:07:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 20:07:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 20:07:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 20:07:56,837 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 20:07:56,837 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 20:07:56,837 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 20:07:56,837 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 20:07:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 20:07:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 20:07:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 20:07:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 20:07:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 20:07:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 20:07:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 20:07:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 20:07:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 20:07:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 20:07:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 20:07:56,842 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 20:07:56,842 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 20:07:56,842 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 20:07:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 20:07:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 20:07:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 20:07:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 20:07:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 20:07:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 20:07:56,844 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 20:07:56,844 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 20:07:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 20:07:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 20:07:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 20:07:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 20:07:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 20:07:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 20:07:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 20:07:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 20:07:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 20:07:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 20:07:56,847 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 20:07:56,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 20:07:56,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 20:07:56,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 20:07:56,847 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 20:07:56,848 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 20:07:56,848 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 20:07:56,848 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 20:07:56,848 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 20:07:56,848 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 20:07:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 20:07:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 20:07:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 20:07:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 20:07:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 20:07:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 20:07:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 20:07:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 20:07:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 20:07:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 20:07:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 20:07:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 20:07:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 20:07:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 20:07:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 20:07:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 20:07:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 20:07:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 20:07:56,853 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 20:07:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 20:07:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 20:07:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 20:07:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 20:07:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-15 20:07:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:07:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:07:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:07:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-15 20:07:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:07:56,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:07:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 20:07:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:07:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 20:07:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:07:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:07:57,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:07:57,538 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 20:07:57,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:57 BoogieIcfgContainer [2021-10-15 20:07:57,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:07:57,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:07:57,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:07:57,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:07:57,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:07:56" (1/3) ... [2021-10-15 20:07:57,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f32fff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:07:57, skipping insertion in model container [2021-10-15 20:07:57,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:56" (2/3) ... [2021-10-15 20:07:57,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f32fff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:07:57, skipping insertion in model container [2021-10-15 20:07:57,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:57" (3/3) ... [2021-10-15 20:07:57,579 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-10-15 20:07:57,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:07:57,585 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-15 20:07:57,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:07:57,650 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 [2021-10-15 20:07:57,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-15 20:07:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 20:07:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 20:07:57,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:07:57,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:57,678 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:07:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-15 20:07:57,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:57,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731080835] [2021-10-15 20:07:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:57,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:07:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:58,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:58,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731080835] [2021-10-15 20:07:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731080835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:58,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:58,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:07:58,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672866056] [2021-10-15 20:07:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:07:58,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:07:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:07:58,057 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-15 20:07:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:07:58,346 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-15 20:07:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:07:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-10-15 20:07:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:07:58,361 INFO L225 Difference]: With dead ends: 92 [2021-10-15 20:07:58,362 INFO L226 Difference]: Without dead ends: 89 [2021-10-15 20:07:58,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:07:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-15 20:07:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-15 20:07:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 20:07:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-15 20:07:58,416 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-15 20:07:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:07:58,416 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-15 20:07:58,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-15 20:07:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-15 20:07:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 20:07:58,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:07:58,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:58,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:07:58,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:07:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:58,420 INFO L82 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-15 20:07:58,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:58,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347929752] [2021-10-15 20:07:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:58,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:58,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:07:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:58,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:58,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347929752] [2021-10-15 20:07:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347929752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:58,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:58,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:07:58,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854022114] [2021-10-15 20:07:58,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:07:58,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:07:58,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:07:58,643 INFO L87 Difference]: Start difference. First operand 71 states and 88 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) [2021-10-15 20:07:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:07:58,950 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-15 20:07:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:07:58,950 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 [2021-10-15 20:07:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:07:58,955 INFO L225 Difference]: With dead ends: 91 [2021-10-15 20:07:58,955 INFO L226 Difference]: Without dead ends: 91 [2021-10-15 20:07:58,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-15 20:07:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-15 20:07:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 20:07:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-15 20:07:58,976 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-15 20:07:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:07:58,976 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-15 20:07:58,977 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) [2021-10-15 20:07:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-15 20:07:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 20:07:58,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:07:58,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:58,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:07:58,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:07:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:58,979 INFO L82 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-15 20:07:58,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:58,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683008135] [2021-10-15 20:07:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:58,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:59,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:07:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:59,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:59,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683008135] [2021-10-15 20:07:59,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683008135] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:59,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:59,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:07:59,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445429212] [2021-10-15 20:07:59,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:07:59,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:07:59,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:07:59,191 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-15 20:07:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:07:59,513 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-15 20:07:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:07:59,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 10 [2021-10-15 20:07:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:07:59,519 INFO L225 Difference]: With dead ends: 135 [2021-10-15 20:07:59,520 INFO L226 Difference]: Without dead ends: 135 [2021-10-15 20:07:59,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:07:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-15 20:07:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-15 20:07:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 20:07:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-15 20:07:59,540 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-15 20:07:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:07:59,540 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-15 20:07:59,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-15 20:07:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-15 20:07:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 20:07:59,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:07:59,542 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:59,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:07:59,542 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:07:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:59,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-15 20:07:59,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:59,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350956965] [2021-10-15 20:07:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:59,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:07:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:59,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:59,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350956965] [2021-10-15 20:07:59,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350956965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:59,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:59,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:07:59,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208793706] [2021-10-15 20:07:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:07:59,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:07:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:07:59,682 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-15 20:07:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:07:59,874 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-15 20:07:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:07:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-10-15 20:07:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:07:59,878 INFO L225 Difference]: With dead ends: 149 [2021-10-15 20:07:59,878 INFO L226 Difference]: Without dead ends: 144 [2021-10-15 20:07:59,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:07:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-15 20:07:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-15 20:07:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-15 20:07:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-15 20:07:59,909 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-15 20:07:59,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:07:59,909 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-15 20:07:59,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-15 20:07:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-15 20:07:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:07:59,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:07:59,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:59,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:07:59,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:07:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:59,912 INFO L82 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-15 20:07:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:59,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204986120] [2021-10-15 20:07:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:59,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:00,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:00,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204986120] [2021-10-15 20:08:00,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204986120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:00,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:00,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:08:00,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543403724] [2021-10-15 20:08:00,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:00,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:00,023 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:00,387 INFO L93 Difference]: Finished difference Result 174 states and 254 transitions. [2021-10-15 20:08:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-15 20:08:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:00,390 INFO L225 Difference]: With dead ends: 174 [2021-10-15 20:08:00,390 INFO L226 Difference]: Without dead ends: 174 [2021-10-15 20:08:00,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:08:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-15 20:08:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2021-10-15 20:08:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.7767857142857142) internal successors, (199), 139 states have internal predecessors, (199), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) [2021-10-15 20:08:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-10-15 20:08:00,419 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 13 [2021-10-15 20:08:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:00,419 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-10-15 20:08:00,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-10-15 20:08:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:08:00,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:00,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:00,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:08:00,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-15 20:08:00,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223697357] [2021-10-15 20:08:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:00,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:00,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:00,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:00,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223697357] [2021-10-15 20:08:00,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223697357] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:00,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:00,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:08:00,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953384816] [2021-10-15 20:08:00,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:00,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:00,551 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:00,908 INFO L93 Difference]: Finished difference Result 265 states and 403 transitions. [2021-10-15 20:08:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:08:00,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-15 20:08:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:00,912 INFO L225 Difference]: With dead ends: 265 [2021-10-15 20:08:00,912 INFO L226 Difference]: Without dead ends: 265 [2021-10-15 20:08:00,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-15 20:08:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 238. [2021-10-15 20:08:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 189 states have (on average 1.7195767195767195) internal successors, (325), 216 states have internal predecessors, (325), 17 states have call successors, (17), 12 states have call predecessors, (17), 14 states have return successors, (34), 10 states have call predecessors, (34), 16 states have call successors, (34) [2021-10-15 20:08:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 376 transitions. [2021-10-15 20:08:00,932 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 376 transitions. Word has length 13 [2021-10-15 20:08:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:00,933 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 376 transitions. [2021-10-15 20:08:00,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 376 transitions. [2021-10-15 20:08:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:08:00,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:00,934 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:00,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:08:00,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-15 20:08:00,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:00,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444569774] [2021-10-15 20:08:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:00,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:01,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:01,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:01,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444569774] [2021-10-15 20:08:01,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444569774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:01,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:01,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:08:01,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858056591] [2021-10-15 20:08:01,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:01,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:01,081 INFO L87 Difference]: Start difference. First operand 238 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:01,447 INFO L93 Difference]: Finished difference Result 329 states and 503 transitions. [2021-10-15 20:08:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:08:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-15 20:08:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:01,452 INFO L225 Difference]: With dead ends: 329 [2021-10-15 20:08:01,452 INFO L226 Difference]: Without dead ends: 329 [2021-10-15 20:08:01,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-10-15 20:08:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 305. [2021-10-15 20:08:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 253 states have (on average 1.683794466403162) internal successors, (426), 278 states have internal predecessors, (426), 17 states have call successors, (17), 17 states have call predecessors, (17), 19 states have return successors, (34), 10 states have call predecessors, (34), 16 states have call successors, (34) [2021-10-15 20:08:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 477 transitions. [2021-10-15 20:08:01,477 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 477 transitions. Word has length 13 [2021-10-15 20:08:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:01,477 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 477 transitions. [2021-10-15 20:08:01,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 477 transitions. [2021-10-15 20:08:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 20:08:01,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:01,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:01,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:08:01,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:01,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-15 20:08:01,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:01,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390620131] [2021-10-15 20:08:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:01,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:01,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:01,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:01,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390620131] [2021-10-15 20:08:01,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390620131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:01,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:01,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:08:01,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64970904] [2021-10-15 20:08:01,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:01,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:01,605 INFO L87 Difference]: Start difference. First operand 305 states and 477 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:01,834 INFO L93 Difference]: Finished difference Result 270 states and 379 transitions. [2021-10-15 20:08:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-15 20:08:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:01,838 INFO L225 Difference]: With dead ends: 270 [2021-10-15 20:08:01,838 INFO L226 Difference]: Without dead ends: 270 [2021-10-15 20:08:01,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:08:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-15 20:08:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2021-10-15 20:08:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 192 states have (on average 1.5989583333333333) internal successors, (307), 211 states have internal predecessors, (307), 14 states have call successors, (14), 14 states have call predecessors, (14), 17 states have return successors, (24), 9 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-15 20:08:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 345 transitions. [2021-10-15 20:08:01,853 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 345 transitions. Word has length 14 [2021-10-15 20:08:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:01,853 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 345 transitions. [2021-10-15 20:08:01,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 345 transitions. [2021-10-15 20:08:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 20:08:01,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:01,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:01,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:08:01,855 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:01,855 INFO L82 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-15 20:08:01,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:01,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971867230] [2021-10-15 20:08:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:01,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:01,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:01,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:01,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971867230] [2021-10-15 20:08:01,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971867230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:01,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:01,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:08:01,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161892240] [2021-10-15 20:08:01,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:01,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:01,955 INFO L87 Difference]: Start difference. First operand 235 states and 345 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:02,213 INFO L93 Difference]: Finished difference Result 402 states and 560 transitions. [2021-10-15 20:08:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:08:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 20:08:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:02,217 INFO L225 Difference]: With dead ends: 402 [2021-10-15 20:08:02,217 INFO L226 Difference]: Without dead ends: 402 [2021-10-15 20:08:02,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:08:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-10-15 20:08:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 376. [2021-10-15 20:08:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 305 states have (on average 1.498360655737705) internal successors, (457), 336 states have internal predecessors, (457), 24 states have call successors, (24), 24 states have call predecessors, (24), 35 states have return successors, (50), 15 states have call predecessors, (50), 23 states have call successors, (50) [2021-10-15 20:08:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 531 transitions. [2021-10-15 20:08:02,254 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 531 transitions. Word has length 15 [2021-10-15 20:08:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:02,255 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 531 transitions. [2021-10-15 20:08:02,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 531 transitions. [2021-10-15 20:08:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 20:08:02,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:02,260 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:02,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:08:02,261 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-15 20:08:02,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:02,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720361530] [2021-10-15 20:08:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:02,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:08:02,312 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:08:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:08:02,390 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:08:02,390 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:08:02,391 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 20:08:02,393 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-15 20:08:02,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-15 20:08:02,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-15 20:08:02,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-15 20:08:02,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-15 20:08:02,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-15 20:08:02,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-15 20:08:02,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-15 20:08:02,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-15 20:08:02,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-15 20:08:02,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-15 20:08:02,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-15 20:08:02,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-15 20:08:02,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-15 20:08:02,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 20:08:02,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 20:08:02,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:08:02,399 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:08:02,400 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:08:02,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:08:02,405 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:08:02,439 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-15 20:08:02,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:08:02 BoogieIcfgContainer [2021-10-15 20:08:02,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:08:02,484 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:08:02,484 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:08:02,485 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:08:02,485 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:57" (3/4) ... [2021-10-15 20:08:02,488 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:08:02,488 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:08:02,490 INFO L168 Benchmark]: Toolchain (without parser) took 6357.98 ms. Allocated memory was 90.2 MB in the beginning and 140.5 MB in the end (delta: 50.3 MB). Free memory was 53.3 MB in the beginning and 104.3 MB in the end (delta: -51.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:02,490 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 66.3 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:02,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 479.49 ms. Allocated memory is still 90.2 MB. Free memory was 53.0 MB in the beginning and 58.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:02,492 INFO L168 Benchmark]: Boogie Preprocessor took 123.57 ms. Allocated memory is still 90.2 MB. Free memory was 58.0 MB in the beginning and 55.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:02,492 INFO L168 Benchmark]: RCFGBuilder took 803.76 ms. Allocated memory is still 90.2 MB. Free memory was 55.0 MB in the beginning and 63.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:02,493 INFO L168 Benchmark]: TraceAbstraction took 4940.27 ms. Allocated memory was 90.2 MB in the beginning and 140.5 MB in the end (delta: 50.3 MB). Free memory was 63.3 MB in the beginning and 104.3 MB in the end (delta: -41.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:02,493 INFO L168 Benchmark]: Witness Printer took 4.24 ms. Allocated memory is still 140.5 MB. Free memory is still 104.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:02,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 66.3 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 479.49 ms. Allocated memory is still 90.2 MB. Free memory was 53.0 MB in the beginning and 58.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 123.57 ms. Allocated memory is still 90.2 MB. Free memory was 58.0 MB in the beginning and 55.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 803.76 ms. Allocated memory is still 90.2 MB. Free memory was 55.0 MB in the beginning and 63.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4940.27 ms. Allocated memory was 90.2 MB in the beginning and 140.5 MB in the end (delta: 50.3 MB). Free memory was 63.3 MB in the beginning and 104.3 MB in the end (delta: -41.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.24 ms. Allocated memory is still 140.5 MB. Free memory is still 104.3 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=49, \old(garbage)=60, \old(pc1)=55, \old(pc4)=52, \old(res4)=68, \old(S)=61, \old(S)=64, \old(t1)=71, \old(t1)=58, \old(t4)=65, \old(t4)=59, \old(x1)=67, \old(x1)=69, \old(x4)=57, \old(x4)=54, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - 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: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: 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: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 4764.0ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 24.9ms, AutomataDifference: 2769.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 813 SDtfs, 508 SDslu, 788 SDs, 0 SdLazy, 1208 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1623.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1017.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=9, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 223.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 215 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 51.2ms SsaConstructionTime, 238.0ms SatisfiabilityAnalysisTime, 1094.1ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 863 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 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 [2021-10-15 20:08:02,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/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-5709675 [2021-10-15 20:08:05,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:08:05,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:08:05,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:08:05,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:08:05,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:08:05,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:08:05,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:08:05,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:08:05,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:08:05,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:08:05,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:08:05,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:08:05,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:08:05,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:08:05,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:08:05,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:08:05,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:08:05,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:08:05,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:08:05,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:08:05,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:08:05,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:08:05,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:08:05,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:08:05,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:08:05,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:08:05,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:08:05,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:08:05,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:08:05,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:08:05,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:08:05,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:08:05,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:08:05,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:08:05,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:08:05,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:08:05,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:08:05,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:08:05,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:08:05,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:08:05,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-15 20:08:05,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:08:05,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:08:05,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:08:05,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:08:05,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:08:05,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:08:05,184 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:08:05,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:08:05,185 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:08:05,185 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 20:08:05,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:08:05,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:08:05,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:08:05,187 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 20:08:05,188 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 20:08:05,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 20:08:05,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:08:05,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 20:08:05,189 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 20:08:05,189 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 20:08:05,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:08:05,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:08:05,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:08:05,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:08:05,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:08:05,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:08:05,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:08:05,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:08:05,192 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 20:08:05,192 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 20:08:05,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:08:05,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 20:08:05,193 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_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2021-10-15 20:08:05,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:08:05,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:08:05,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:08:05,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:08:05,624 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:08:05,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-15 20:08:05,709 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/922e8968e/f7c87d04618d4e7e88fb587c1cc75bf8/FLAG41c9adb3b [2021-10-15 20:08:06,279 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:08:06,280 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-15 20:08:06,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/922e8968e/f7c87d04618d4e7e88fb587c1cc75bf8/FLAG41c9adb3b [2021-10-15 20:08:06,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/data/922e8968e/f7c87d04618d4e7e88fb587c1cc75bf8 [2021-10-15 20:08:06,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:08:06,584 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 20:08:06,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:08:06,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:08:06,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:08:06,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2195e69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06, skipping insertion in model container [2021-10-15 20:08:06,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:08:06,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:08:07,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:08:07,137 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:08:07,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:08:07,217 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:08:07,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07 WrapperNode [2021-10-15 20:08:07,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:08:07,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:08:07,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:08:07,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:08:07,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:08:07,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:08:07,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:08:07,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:08:07,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (1/1) ... [2021-10-15 20:08:07,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:08:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:07,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:08:07,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:08:07,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 20:08:07,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:08:07,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-15 20:08:07,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 20:08:07,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 20:08:07,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 20:08:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 20:08:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 20:08:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 20:08:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-15 20:08:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-15 20:08:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 20:08:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 20:08:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 20:08:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 20:08:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 20:08:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 20:08:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:08:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 20:08:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 20:08:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 20:08:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 20:08:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 20:08:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 20:08:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 20:08:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 20:08:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 20:08:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 20:08:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 20:08:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 20:08:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 20:08:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 20:08:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 20:08:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 20:08:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 20:08:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 20:08:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 20:08:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 20:08:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 20:08:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 20:08:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 20:08:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 20:08:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 20:08:07,389 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 20:08:07,390 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 20:08:07,390 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 20:08:07,390 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 20:08:07,390 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 20:08:07,391 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 20:08:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 20:08:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 20:08:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 20:08:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 20:08:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 20:08:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 20:08:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 20:08:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 20:08:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 20:08:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 20:08:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 20:08:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 20:08:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 20:08:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 20:08:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 20:08:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 20:08:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 20:08:07,397 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 20:08:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 20:08:07,398 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 20:08:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 20:08:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 20:08:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 20:08:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 20:08:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 20:08:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 20:08:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 20:08:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 20:08:07,401 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 20:08:07,401 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 20:08:07,401 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 20:08:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 20:08:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 20:08:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 20:08:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 20:08:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 20:08:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 20:08:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 20:08:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 20:08:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-15 20:08:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:08:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 20:08:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 20:08:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:08:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 20:08:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 20:08:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:08:07,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-15 20:08:07,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-15 20:08:07,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-15 20:08:08,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:08:08,114 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 20:08:08,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:08 BoogieIcfgContainer [2021-10-15 20:08:08,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:08:08,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:08:08,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:08:08,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:08:08,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:08:06" (1/3) ... [2021-10-15 20:08:08,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d017416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:08:08, skipping insertion in model container [2021-10-15 20:08:08,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:07" (2/3) ... [2021-10-15 20:08:08,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d017416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:08:08, skipping insertion in model container [2021-10-15 20:08:08,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:08" (3/3) ... [2021-10-15 20:08:08,144 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-10-15 20:08:08,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:08:08,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-15 20:08:08,199 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:08:08,208 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 [2021-10-15 20:08:08,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-15 20:08:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 20:08:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 20:08:08,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:08,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:08,241 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-15 20:08:08,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:08,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383902667] [2021-10-15 20:08:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:08,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:08,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:08,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 20:08:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-15 20:08:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:08,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:08,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:08,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383902667] [2021-10-15 20:08:08,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383902667] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:08,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:08,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 20:08:08,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703391302] [2021-10-15 20:08:08,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:08:08,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:08:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:08:08,652 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-15 20:08:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:08,670 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-15 20:08:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:08:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-10-15 20:08:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:08,682 INFO L225 Difference]: With dead ends: 72 [2021-10-15 20:08:08,682 INFO L226 Difference]: Without dead ends: 69 [2021-10-15 20:08:08,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:08:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-15 20:08:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-15 20:08:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 20:08:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-15 20:08:08,721 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-15 20:08:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:08,721 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-15 20:08:08,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-15 20:08:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-15 20:08:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 20:08:08,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:08,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:08,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:08,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:08,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-15 20:08:08,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:08,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989875700] [2021-10-15 20:08:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:08,943 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:08,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:08,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 20:08:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:08:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:09,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:09,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:09,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989875700] [2021-10-15 20:08:09,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989875700] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:09,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:09,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 20:08:09,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356530007] [2021-10-15 20:08:09,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:08:09,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:08:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:08:09,481 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-15 20:08:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:09,541 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-15 20:08:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:08:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 8 [2021-10-15 20:08:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:09,545 INFO L225 Difference]: With dead ends: 120 [2021-10-15 20:08:09,545 INFO L226 Difference]: Without dead ends: 120 [2021-10-15 20:08:09,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:08:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-15 20:08:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-15 20:08:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 20:08:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-15 20:08:09,563 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-15 20:08:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:09,563 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-15 20:08:09,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-15 20:08:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-15 20:08:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 20:08:09,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:09,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:09,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:09,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:09,777 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-15 20:08:09,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:09,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130033484] [2021-10-15 20:08:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:09,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:09,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:09,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 20:08:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:09,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:08:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:09,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:10,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:10,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130033484] [2021-10-15 20:08:10,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130033484] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:10,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:10,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 20:08:10,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535320515] [2021-10-15 20:08:10,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:08:10,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:08:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:08:10,016 INFO L87 Difference]: Start difference. First operand 102 states and 145 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), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:10,167 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-15 20:08:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:08:10,168 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 [2021-10-15 20:08:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:10,170 INFO L225 Difference]: With dead ends: 128 [2021-10-15 20:08:10,171 INFO L226 Difference]: Without dead ends: 125 [2021-10-15 20:08:10,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:08:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-15 20:08:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-15 20:08:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-15 20:08:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-15 20:08:10,187 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-15 20:08:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:10,188 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-15 20:08:10,188 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) [2021-10-15 20:08:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-15 20:08:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 20:08:10,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:10,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:10,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:10,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:10,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-15 20:08:10,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:10,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502614396] [2021-10-15 20:08:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:10,403 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:10,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:10,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 20:08:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:08:10,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:10,658 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 [2021-10-15 20:08:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:10,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:10,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:10,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502614396] [2021-10-15 20:08:10,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502614396] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:10,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:10,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 20:08:10,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059283861] [2021-10-15 20:08:10,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:08:10,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:08:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:08:10,724 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:10,916 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-15 20:08:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:08:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-15 20:08:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:10,924 INFO L225 Difference]: With dead ends: 198 [2021-10-15 20:08:10,925 INFO L226 Difference]: Without dead ends: 198 [2021-10-15 20:08:10,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:08:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-15 20:08:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-15 20:08:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-15 20:08:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-15 20:08:10,972 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-15 20:08:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:10,972 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-15 20:08:10,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-15 20:08:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 20:08:10,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:10,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:10,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:11,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:11,181 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-15 20:08:11,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:11,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961027395] [2021-10-15 20:08:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:11,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:11,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:11,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 20:08:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:08:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:11,390 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 [2021-10-15 20:08:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:11,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:11,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:11,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961027395] [2021-10-15 20:08:11,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961027395] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:11,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:11,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-15 20:08:11,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412037902] [2021-10-15 20:08:11,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:11,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:11,493 INFO L87 Difference]: Start difference. First operand 177 states and 276 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:11,802 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-15 20:08:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:08:11,804 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-15 20:08:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:11,807 INFO L225 Difference]: With dead ends: 333 [2021-10-15 20:08:11,807 INFO L226 Difference]: Without dead ends: 333 [2021-10-15 20:08:11,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-15 20:08:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-15 20:08:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-10-15 20:08:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-15 20:08:11,864 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-15 20:08:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:11,865 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-15 20:08:11,865 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-15 20:08:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 20:08:11,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:11,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:11,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:12,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:12,078 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:12,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-15 20:08:12,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:12,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170821683] [2021-10-15 20:08:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:12,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:12,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:12,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:12,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 20:08:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:08:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:12,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:12,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:12,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170821683] [2021-10-15 20:08:12,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170821683] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:12,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:12,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 20:08:12,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153505625] [2021-10-15 20:08:12,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:12,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:12,390 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:12,427 INFO L93 Difference]: Finished difference Result 212 states and 298 transitions. [2021-10-15 20:08:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:08:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-15 20:08:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:12,430 INFO L225 Difference]: With dead ends: 212 [2021-10-15 20:08:12,430 INFO L226 Difference]: Without dead ends: 212 [2021-10-15 20:08:12,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-15 20:08:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 181. [2021-10-15 20:08:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-15 20:08:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-15 20:08:12,442 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-15 20:08:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:12,442 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-15 20:08:12,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-15 20:08:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:08:12,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:12,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:12,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:12,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:12,658 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:12,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-15 20:08:12,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:12,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499784034] [2021-10-15 20:08:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:12,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:12,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:12,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 20:08:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:08:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:12,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:08:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:12,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:08:12,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499784034] [2021-10-15 20:08:12,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499784034] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:12,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:12,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 20:08:12,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136003101] [2021-10-15 20:08:12,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:12,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:08:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:12,939 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:12,985 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-10-15 20:08:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:08:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-15 20:08:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:12,992 INFO L225 Difference]: With dead ends: 281 [2021-10-15 20:08:12,992 INFO L226 Difference]: Without dead ends: 281 [2021-10-15 20:08:12,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-10-15 20:08:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-10-15 20:08:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-10-15 20:08:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-15 20:08:13,017 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-15 20:08:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:13,017 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-15 20:08:13,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-15 20:08:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-15 20:08:13,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:13,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:13,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:13,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:13,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-15 20:08:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-15 20:08:13,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:08:13,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654138127] [2021-10-15 20:08:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:13,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:08:13,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:08:13,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:08:13,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 20:08:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:08:13,431 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:08:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:08:13,572 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-15 20:08:13,572 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:08:13,573 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 20:08:13,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-15 20:08:13,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-15 20:08:13,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-15 20:08:13,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-15 20:08:13,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-15 20:08:13,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-15 20:08:13,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-15 20:08:13,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-15 20:08:13,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-15 20:08:13,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-15 20:08:13,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-15 20:08:13,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-15 20:08:13,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-15 20:08:13,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-15 20:08:13,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 20:08:13,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 20:08:13,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:08:13,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:08:13,592 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:08:13,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:13,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:08:13,808 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:08:13,825 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-15 20:08:13,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:08:13 BoogieIcfgContainer [2021-10-15 20:08:13,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:08:13,863 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:08:13,863 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:08:13,863 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:08:13,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:08" (3/4) ... [2021-10-15 20:08:13,866 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:08:13,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:08:13,868 INFO L168 Benchmark]: Toolchain (without parser) took 7282.84 ms. Allocated memory was 56.6 MB in the beginning and 98.6 MB in the end (delta: 41.9 MB). Free memory was 33.2 MB in the beginning and 54.2 MB in the end (delta: -21.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:13,869 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:13,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.45 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 33.0 MB in the beginning and 48.3 MB in the end (delta: -15.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:13,870 INFO L168 Benchmark]: Boogie Preprocessor took 72.91 ms. Allocated memory is still 73.4 MB. Free memory was 48.3 MB in the beginning and 45.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:13,871 INFO L168 Benchmark]: RCFGBuilder took 823.30 ms. Allocated memory is still 73.4 MB. Free memory was 44.9 MB in the beginning and 36.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:13,872 INFO L168 Benchmark]: TraceAbstraction took 5724.38 ms. Allocated memory was 73.4 MB in the beginning and 98.6 MB in the end (delta: 25.2 MB). Free memory was 53.1 MB in the beginning and 54.2 MB in the end (delta: -1.1 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:13,872 INFO L168 Benchmark]: Witness Printer took 3.95 ms. Allocated memory is still 98.6 MB. Free memory is still 54.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:13,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 631.45 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 33.0 MB in the beginning and 48.3 MB in the end (delta: -15.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.91 ms. Allocated memory is still 73.4 MB. Free memory was 48.3 MB in the beginning and 45.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 823.30 ms. Allocated memory is still 73.4 MB. Free memory was 44.9 MB in the beginning and 36.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5724.38 ms. Allocated memory was 73.4 MB in the beginning and 98.6 MB in the end (delta: 25.2 MB). Free memory was 53.1 MB in the beginning and 54.2 MB in the end (delta: -1.1 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.95 ms. Allocated memory is still 98.6 MB. Free memory is still 54.2 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=16, \old(pc4)=26, \old(res4)=20, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - 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: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: 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: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 5609.9ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 22.4ms, AutomataDifference: 883.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 668 SDtfs, 519 SDslu, 494 SDs, 0 SdLazy, 164 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 570.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=295occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 194.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 118 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 147.6ms SsaConstructionTime, 438.2ms SatisfiabilityAnalysisTime, 1048.7ms InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 296 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1050 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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 [2021-10-15 20:08:13,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e718bcf5-af89-4b60-9dfb-16f99e8c073a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...