./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:49:10,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:49:10,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:49:10,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:49:10,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:49:10,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:49:10,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:49:10,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:49:10,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:49:10,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:49:10,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:49:10,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:49:10,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:49:10,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:49:10,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:49:10,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:49:10,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:49:10,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:49:10,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:49:10,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:49:10,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:49:10,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:49:10,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:49:10,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:49:10,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:49:10,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:49:10,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:49:10,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:49:10,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:49:10,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:49:10,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:49:10,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:49:10,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:49:10,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:49:10,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:49:10,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:49:10,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:49:10,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:49:10,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:49:10,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:49:10,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:49:10,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:49:10,830 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:49:10,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:49:10,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:49:10,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:49:10,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:49:10,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:49:10,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:49:10,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:49:10,840 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:49:10,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:49:10,841 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:49:10,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:49:10,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:49:10,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:49:10,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:49:10,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:49:10,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:49:10,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:49:10,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:49:10,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:49:10,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:49:10,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:49:10,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:49:10,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:49:10,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:49:10,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:49:10,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:49:10,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:49:10,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:49:10,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:49:10,849 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:49:10,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:49:10,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:49:10,851 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_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 [2022-11-20 11:49:11,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:49:11,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:49:11,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:49:11,269 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:49:11,270 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:49:11,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2018/Problem16.c [2022-11-20 11:49:14,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:49:19,126 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:49:19,127 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/sv-benchmarks/c/eca-rers2018/Problem16.c [2022-11-20 11:49:19,825 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/data/a02fd6f6c/e5fe93ff3c474295a284b6de3a95d68d/FLAGc5589898f [2022-11-20 11:49:19,846 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/data/a02fd6f6c/e5fe93ff3c474295a284b6de3a95d68d [2022-11-20 11:49:19,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:49:19,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:49:19,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:49:19,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:49:19,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:49:19,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:19" (1/1) ... [2022-11-20 11:49:19,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0c574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:19, skipping insertion in model container [2022-11-20 11:49:19,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:19" (1/1) ... [2022-11-20 11:49:19,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:49:22,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:49:24,173 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791] [2022-11-20 11:49:24,302 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830] [2022-11-20 11:51:23,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:51:23,304 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:51:23,316 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791] [2022-11-20 11:51:23,327 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830] [2022-11-20 11:51:30,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:51:34,879 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:51:34,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34 WrapperNode [2022-11-20 11:51:34,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:51:34,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:51:34,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:51:34,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:51:34,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:36,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:43,269 INFO L138 Inliner]: procedures = 1385, calls = 1376, calls flagged for inlining = 1272, calls inlined = 1272, statements flattened = 632995 [2022-11-20 11:51:43,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:51:43,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:51:43,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:51:43,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:51:43,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:43,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:44,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:44,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:47,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:48,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:49,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:49,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:51,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:51:51,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:51:51,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:51:51,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:51:51,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (1/1) ... [2022-11-20 11:51:51,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:51:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:51,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:51:51,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c0c60a-2eeb-4714-b346-98698b855603/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:51:51,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:51:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:51:51,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:51:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-20 11:51:51,130 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-20 11:51:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-20 11:51:51,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-20 11:51:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:51:52,029 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:51:52,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:53:55,272 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:53:55,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:53:55,344 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:53:55,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:53:55 BoogieIcfgContainer [2022-11-20 11:53:55,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:53:55,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:53:55,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:53:55,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:53:55,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:49:19" (1/3) ... [2022-11-20 11:53:55,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0b2c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:53:55, skipping insertion in model container [2022-11-20 11:53:55,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:51:34" (2/3) ... [2022-11-20 11:53:55,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0b2c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:53:55, skipping insertion in model container [2022-11-20 11:53:55,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:53:55" (3/3) ... [2022-11-20 11:53:55,366 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16.c [2022-11-20 11:53:55,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:53:55,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 11:53:55,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:53:55,630 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@644d2637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:53:55,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:53:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-20 11:53:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:53:55,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:55,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:53:55,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2026736529, now seen corresponding path program 1 times [2022-11-20 11:53:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:55,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893070396] [2022-11-20 11:53:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:56,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893070396] [2022-11-20 11:53:56,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893070396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:53:56,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:53:56,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:53:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445555395] [2022-11-20 11:53:56,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:53:56,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:53:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:53:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:53:56,959 INFO L87 Difference]: Start difference. First operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:44,977 INFO L93 Difference]: Finished difference Result 19853 states and 36836 transitions. [2022-11-20 11:54:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:54:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:54:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:45,067 INFO L225 Difference]: With dead ends: 19853 [2022-11-20 11:54:45,068 INFO L226 Difference]: Without dead ends: 11228 [2022-11-20 11:54:45,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:54:45,088 INFO L413 NwaCegarLoop]: 14954 mSDtfsCounter, 3501 mSDsluCounter, 11506 mSDsCounter, 0 mSdLazyCounter, 25181 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 26460 SdHoareTripleChecker+Invalid, 25542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 25181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:45,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 26460 Invalid, 25542 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [361 Valid, 25181 Invalid, 0 Unknown, 0 Unchecked, 46.8s Time] [2022-11-20 11:54:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2022-11-20 11:54:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 10284. [2022-11-20 11:54:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10182 states have (on average 1.8511098016106855) internal successors, (18848), 10281 states have internal predecessors, (18848), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 18948 transitions. [2022-11-20 11:54:45,431 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 18948 transitions. Word has length 13 [2022-11-20 11:54:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:45,431 INFO L495 AbstractCegarLoop]: Abstraction has 10284 states and 18948 transitions. [2022-11-20 11:54:45,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 18948 transitions. [2022-11-20 11:54:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:54:45,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:45,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:54:45,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash -93322037, now seen corresponding path program 1 times [2022-11-20 11:54:45,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:45,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613529533] [2022-11-20 11:54:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613529533] [2022-11-20 11:54:45,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613529533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:45,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:45,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:54:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283868984] [2022-11-20 11:54:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:54:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:54:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:54:45,986 INFO L87 Difference]: Start difference. First operand 10284 states and 18948 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:48,707 INFO L93 Difference]: Finished difference Result 28172 states and 51666 transitions. [2022-11-20 11:55:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:55:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:55:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:48,836 INFO L225 Difference]: With dead ends: 28172 [2022-11-20 11:55:48,837 INFO L226 Difference]: Without dead ends: 17890 [2022-11-20 11:55:48,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:55:48,852 INFO L413 NwaCegarLoop]: 18437 mSDtfsCounter, 8827 mSDsluCounter, 12977 mSDsCounter, 0 mSdLazyCounter, 33252 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8827 SdHoareTripleChecker+Valid, 31414 SdHoareTripleChecker+Invalid, 34404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 33252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:48,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8827 Valid, 31414 Invalid, 34404 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1152 Valid, 33252 Invalid, 0 Unknown, 0 Unchecked, 61.6s Time] [2022-11-20 11:55:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17890 states. [2022-11-20 11:55:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17890 to 15292. [2022-11-20 11:55:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15292 states, 15190 states have (on average 1.8283080974325214) internal successors, (27772), 15289 states have internal predecessors, (27772), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15292 states to 15292 states and 27872 transitions. [2022-11-20 11:55:49,261 INFO L78 Accepts]: Start accepts. Automaton has 15292 states and 27872 transitions. Word has length 20 [2022-11-20 11:55:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:49,265 INFO L495 AbstractCegarLoop]: Abstraction has 15292 states and 27872 transitions. [2022-11-20 11:55:49,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 15292 states and 27872 transitions. [2022-11-20 11:55:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:55:49,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:49,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:55:49,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2128878770, now seen corresponding path program 1 times [2022-11-20 11:55:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:49,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747281363] [2022-11-20 11:55:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:49,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:49,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:49,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747281363] [2022-11-20 11:55:49,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747281363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:49,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:49,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:55:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128161036] [2022-11-20 11:55:49,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:49,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:49,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:49,619 INFO L87 Difference]: Start difference. First operand 15292 states and 27872 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:51,249 INFO L93 Difference]: Finished difference Result 44345 states and 80786 transitions. [2022-11-20 11:55:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 11:55:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:51,330 INFO L225 Difference]: With dead ends: 44345 [2022-11-20 11:55:51,331 INFO L226 Difference]: Without dead ends: 29055 [2022-11-20 11:55:51,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:51,359 INFO L413 NwaCegarLoop]: 16236 mSDtfsCounter, 14909 mSDsluCounter, 15334 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14909 SdHoareTripleChecker+Valid, 31570 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:51,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14909 Valid, 31570 Invalid, 331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [134 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:55:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29055 states. [2022-11-20 11:55:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 28947. [2022-11-20 11:55:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28947 states, 28845 states have (on average 1.826486392789045) internal successors, (52685), 28944 states have internal predecessors, (52685), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28947 states to 28947 states and 52785 transitions. [2022-11-20 11:55:52,176 INFO L78 Accepts]: Start accepts. Automaton has 28947 states and 52785 transitions. Word has length 33 [2022-11-20 11:55:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:52,177 INFO L495 AbstractCegarLoop]: Abstraction has 28947 states and 52785 transitions. [2022-11-20 11:55:52,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 28947 states and 52785 transitions. [2022-11-20 11:55:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:55:52,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:52,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:52,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:55:52,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash -495105420, now seen corresponding path program 1 times [2022-11-20 11:55:52,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:52,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594975422] [2022-11-20 11:55:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:52,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:52,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594975422] [2022-11-20 11:55:52,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594975422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:52,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:52,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:52,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063878463] [2022-11-20 11:55:52,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:52,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:55:52,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:55:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:55:52,679 INFO L87 Difference]: Start difference. First operand 28947 states and 52785 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)