./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skipped.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/skipped.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa --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 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 16:58:50,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 16:58:50,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 16:58:50,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 16:58:50,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 16:58:50,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 16:58:50,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 16:58:50,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 16:58:50,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 16:58:50,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 16:58:50,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 16:58:50,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 16:58:50,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 16:58:50,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 16:58:50,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 16:58:50,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 16:58:50,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 16:58:50,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 16:58:50,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 16:58:50,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 16:58:50,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 16:58:50,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 16:58:50,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 16:58:50,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 16:58:50,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 16:58:50,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 16:58:50,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 16:58:50,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 16:58:50,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 16:58:50,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 16:58:50,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 16:58:50,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 16:58:50,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 16:58:50,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 16:58:50,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 16:58:50,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 16:58:50,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 16:58:50,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 16:58:50,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 16:58:50,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 16:58:50,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 16:58:50,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 16:58:50,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 16:58:50,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 16:58:50,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 16:58:50,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 16:58:50,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 16:58:50,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 16:58:50,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 16:58:50,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 16:58:50,964 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 16:58:50,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 16:58:50,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 16:58:50,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 16:58:50,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 16:58:50,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 16:58:50,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 16:58:50,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 16:58:50,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 16:58:50,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 16:58:50,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 16:58:50,966 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 16:58:50,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 16:58:50,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 16:58:50,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 16:58:50,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 16:58:50,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:58:50,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 16:58:50,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 16:58:50,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 16:58:50,967 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_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 [2021-12-06 16:58:51,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 16:58:51,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 16:58:51,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 16:58:51,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 16:58:51,193 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 16:58:51,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/skipped.c [2021-12-06 16:58:51,237 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/data/b021c59f3/aa033833dcf94aa7930b2fc7c694730f/FLAGff9f1c8ff [2021-12-06 16:58:51,607 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 16:58:51,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/sv-benchmarks/c/array-tiling/skipped.c [2021-12-06 16:58:51,612 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/data/b021c59f3/aa033833dcf94aa7930b2fc7c694730f/FLAGff9f1c8ff [2021-12-06 16:58:51,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/data/b021c59f3/aa033833dcf94aa7930b2fc7c694730f [2021-12-06 16:58:51,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 16:58:51,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 16:58:51,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 16:58:51,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 16:58:51,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 16:58:51,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f96710c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51, skipping insertion in model container [2021-12-06 16:58:51,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 16:58:51,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 16:58:51,754 WARN L230 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_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2021-12-06 16:58:51,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:58:51,775 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 16:58:51,784 WARN L230 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_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2021-12-06 16:58:51,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:58:51,800 INFO L208 MainTranslator]: Completed translation [2021-12-06 16:58:51,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51 WrapperNode [2021-12-06 16:58:51,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 16:58:51,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 16:58:51,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 16:58:51,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 16:58:51,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,834 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-12-06 16:58:51,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 16:58:51,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 16:58:51,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 16:58:51,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 16:58:51,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 16:58:51,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 16:58:51,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 16:58:51,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 16:58:51,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:58:51,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:51,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 16:58:51,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 16:58:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 16:58:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 16:58:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 16:58:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 16:58:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 16:58:51,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 16:58:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 16:58:51,961 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 16:58:51,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 16:58:52,078 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 16:58:52,084 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 16:58:52,084 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 16:58:52,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:58:52 BoogieIcfgContainer [2021-12-06 16:58:52,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 16:58:52,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 16:58:52,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 16:58:52,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 16:58:52,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:58:51" (1/3) ... [2021-12-06 16:58:52,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec9f539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:58:52, skipping insertion in model container [2021-12-06 16:58:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51" (2/3) ... [2021-12-06 16:58:52,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec9f539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:58:52, skipping insertion in model container [2021-12-06 16:58:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:58:52" (3/3) ... [2021-12-06 16:58:52,092 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2021-12-06 16:58:52,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 16:58:52,097 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 16:58:52,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 16:58:52,139 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 16:58:52,139 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 16:58:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 16:58:52,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2021-12-06 16:58:52,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473314811] [2021-12-06 16:58:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:52,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473314811] [2021-12-06 16:58:52,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473314811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:58:52,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:58:52,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 16:58:52,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292069147] [2021-12-06 16:58:52,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:58:52,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 16:58:52,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 16:58:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:58:52,328 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:52,341 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-12-06 16:58:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 16:58:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 16:58:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:52,352 INFO L225 Difference]: With dead ends: 43 [2021-12-06 16:58:52,352 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 16:58:52,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:58:52,359 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:52,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:58:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 16:58:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 16:58:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-06 16:58:52,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-12-06 16:58:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:52,390 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-06 16:58:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-06 16:58:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 16:58:52,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 16:58:52,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2021-12-06 16:58:52,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:52,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013815117] [2021-12-06 16:58:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:52,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013815117] [2021-12-06 16:58:52,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013815117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:58:52,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:58:52,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:58:52,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888643780] [2021-12-06 16:58:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:58:52,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:58:52,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:58:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:58:52,450 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:52,486 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-12-06 16:58:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:58:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 16:58:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:52,487 INFO L225 Difference]: With dead ends: 37 [2021-12-06 16:58:52,487 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 16:58:52,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:58:52,489 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:52,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:58:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 16:58:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-06 16:58:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-06 16:58:52,496 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2021-12-06 16:58:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:52,496 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-06 16:58:52,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-06 16:58:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 16:58:52,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 16:58:52,497 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2021-12-06 16:58:52,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:52,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767316347] [2021-12-06 16:58:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767316347] [2021-12-06 16:58:52,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767316347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503933483] [2021-12-06 16:58:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:52,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:52,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 16:58:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 16:58:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503933483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:52,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 16:58:52,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23672429] [2021-12-06 16:58:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 16:58:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 16:58:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 16:58:52,749 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:52,792 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-06 16:58:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 16:58:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 16:58:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:52,794 INFO L225 Difference]: With dead ends: 39 [2021-12-06 16:58:52,794 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 16:58:52,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 16:58:52,795 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:52,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:58:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 16:58:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-06 16:58:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-06 16:58:52,799 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-12-06 16:58:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:52,800 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-06 16:58:52,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-06 16:58:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 16:58:52,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 16:58:53,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:53,003 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2021-12-06 16:58:53,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708148451] [2021-12-06 16:58:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:53,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:53,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:53,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708148451] [2021-12-06 16:58:53,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708148451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:58:53,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:58:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:58:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857353467] [2021-12-06 16:58:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:58:53,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 16:58:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 16:58:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 16:58:53,226 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:53,260 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-12-06 16:58:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 16:58:53,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 16:58:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:53,261 INFO L225 Difference]: With dead ends: 35 [2021-12-06 16:58:53,261 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 16:58:53,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 16:58:53,263 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:53,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:58:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 16:58:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-06 16:58:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-06 16:58:53,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-12-06 16:58:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:53,268 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-06 16:58:53,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-06 16:58:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 16:58:53,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:53,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:53,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 16:58:53,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2021-12-06 16:58:53,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:53,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641024622] [2021-12-06 16:58:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:53,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:53,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641024622] [2021-12-06 16:58:53,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641024622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492237414] [2021-12-06 16:58:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:53,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:53,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:53,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:53,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 16:58:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 16:58:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:53,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:58:53,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:58:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 16:58:53,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 16:58:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:53,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 16:58:53,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 16:58:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492237414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:53,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:53,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-06 16:58:53,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812944594] [2021-12-06 16:58:53,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:53,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 16:58:53,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 16:58:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 16:58:53,708 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:53,820 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-12-06 16:58:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 16:58:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 16:58:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:53,821 INFO L225 Difference]: With dead ends: 58 [2021-12-06 16:58:53,821 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 16:58:53,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-06 16:58:53,822 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:53,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 90 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 16:58:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2021-12-06 16:58:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-06 16:58:53,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2021-12-06 16:58:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:53,827 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-06 16:58:53,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-06 16:58:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 16:58:53,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:53,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:53,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 16:58:54,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:54,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2021-12-06 16:58:54,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:54,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184646984] [2021-12-06 16:58:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:54,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:54,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:54,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184646984] [2021-12-06 16:58:54,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184646984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:54,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845105838] [2021-12-06 16:58:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:54,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:54,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:54,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 16:58:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 16:58:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:54,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:58:54,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 16:58:54,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 16:58:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:54,444 INFO L354 Elim1Store]: treesize reduction 8, result has 38.5 percent of original size [2021-12-06 16:58:54,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 16:58:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:54,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845105838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:54,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:54,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2021-12-06 16:58:54,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779929855] [2021-12-06 16:58:54,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:54,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 16:58:54,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 16:58:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-06 16:58:54,459 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:54,555 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-06 16:58:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 16:58:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 16:58:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:54,557 INFO L225 Difference]: With dead ends: 53 [2021-12-06 16:58:54,557 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 16:58:54,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-12-06 16:58:54,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:54,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 57 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 16:58:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2021-12-06 16:58:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 16:58:54,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-12-06 16:58:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:54,564 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 16:58:54,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 16:58:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 16:58:54,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:54,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:54,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 16:58:54,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 16:58:54,767 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1653781302, now seen corresponding path program 1 times [2021-12-06 16:58:54,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:54,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735662223] [2021-12-06 16:58:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:54,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:54,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735662223] [2021-12-06 16:58:54,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735662223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380188415] [2021-12-06 16:58:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:54,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:54,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:54,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 16:58:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 16:58:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:55,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:58:55,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:58:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:55,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:55,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 16:58:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 16:58:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:55,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380188415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:55,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:55,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2021-12-06 16:58:55,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373967414] [2021-12-06 16:58:55,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 16:58:55,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 16:58:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 16:58:55,192 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:55,324 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-06 16:58:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 16:58:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 16:58:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:55,325 INFO L225 Difference]: With dead ends: 63 [2021-12-06 16:58:55,325 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 16:58:55,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-06 16:58:55,326 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:55,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 96 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 16:58:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-12-06 16:58:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-12-06 16:58:55,331 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 25 [2021-12-06 16:58:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:55,331 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-06 16:58:55,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-12-06 16:58:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 16:58:55,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:55,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:55,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 16:58:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:55,534 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2021-12-06 16:58:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274049893] [2021-12-06 16:58:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:55,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:55,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:55,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274049893] [2021-12-06 16:58:55,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274049893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:55,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128929368] [2021-12-06 16:58:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:55,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:55,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:55,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:55,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 16:58:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 16:58:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:55,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:58:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 16:58:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:55,893 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 16:58:55,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 16:58:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:58:55,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128929368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:55,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:55,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 14 [2021-12-06 16:58:55,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403017470] [2021-12-06 16:58:55,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:55,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 16:58:55,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 16:58:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 16:58:55,906 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:56,013 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-12-06 16:58:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 16:58:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 16:58:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:56,014 INFO L225 Difference]: With dead ends: 53 [2021-12-06 16:58:56,014 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 16:58:56,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-06 16:58:56,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:56,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 16:58:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-12-06 16:58:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 16:58:56,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2021-12-06 16:58:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:56,019 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 16:58:56,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 16:58:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 16:58:56,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:56,020 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:56,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 16:58:56,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:56,221 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 2 times [2021-12-06 16:58:56,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:56,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133604933] [2021-12-06 16:58:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:56,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 16:58:56,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133604933] [2021-12-06 16:58:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133604933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644373716] [2021-12-06 16:58:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 16:58:56,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:56,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:56,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 16:58:56,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 16:58:56,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:58:56,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 16:58:56,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 16:58:56,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 16:58:56,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644373716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:56,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:56,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 16:58:56,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138684655] [2021-12-06 16:58:56,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:56,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 16:58:56,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 16:58:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 16:58:56,442 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:56,545 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-12-06 16:58:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 16:58:56,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 16:58:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:56,546 INFO L225 Difference]: With dead ends: 88 [2021-12-06 16:58:56,546 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 16:58:56,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-06 16:58:56,547 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:56,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 16:58:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-12-06 16:58:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-06 16:58:56,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2021-12-06 16:58:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:56,552 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-06 16:58:56,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-06 16:58:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 16:58:56,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:56,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:56,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 16:58:56,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:56,755 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 3 times [2021-12-06 16:58:56,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:56,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489061494] [2021-12-06 16:58:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:56,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 16:58:56,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489061494] [2021-12-06 16:58:56,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489061494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253817124] [2021-12-06 16:58:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 16:58:56,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:56,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:56,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 16:58:56,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 16:58:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:58:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 16:58:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 16:58:57,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 16:58:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253817124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:57,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2021-12-06 16:58:57,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403690133] [2021-12-06 16:58:57,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 16:58:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 16:58:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-12-06 16:58:57,289 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:57,558 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-12-06 16:58:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 16:58:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 16:58:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:57,559 INFO L225 Difference]: With dead ends: 62 [2021-12-06 16:58:57,559 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 16:58:57,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 16:58:57,560 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 219 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:57,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 70 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 16:58:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2021-12-06 16:58:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-06 16:58:57,564 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2021-12-06 16:58:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:57,564 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-06 16:58:57,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-06 16:58:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 16:58:57,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:57,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:57,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 16:58:57,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:57,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 4 times [2021-12-06 16:58:57,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005242629] [2021-12-06 16:58:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:57,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 16:58:57,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005242629] [2021-12-06 16:58:57,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005242629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845847392] [2021-12-06 16:58:57,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 16:58:57,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:57,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:57,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:58,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 16:58:58,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 16:58:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:58:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 16:58:58,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 16:58:58,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 16:58:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845847392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:58,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2021-12-06 16:58:58,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368009293] [2021-12-06 16:58:58,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:58,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 16:58:58,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 16:58:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-06 16:58:58,335 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:58,495 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-06 16:58:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 16:58:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 16:58:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:58,496 INFO L225 Difference]: With dead ends: 76 [2021-12-06 16:58:58,496 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 16:58:58,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-12-06 16:58:58,497 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:58,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 58 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:58:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 16:58:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2021-12-06 16:58:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-12-06 16:58:58,501 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2021-12-06 16:58:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:58,501 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-12-06 16:58:58,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-12-06 16:58:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 16:58:58,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:58,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:58,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 16:58:58,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:58,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1453047458, now seen corresponding path program 5 times [2021-12-06 16:58:58,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91466066] [2021-12-06 16:58:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:58,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:59,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:59,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91466066] [2021-12-06 16:58:59,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91466066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:58:59,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671807973] [2021-12-06 16:58:59,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 16:58:59,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:59,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:59,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 16:58:59,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 16:58:59,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:58:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 16:58:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:58:59,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:58:59,242 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 16:58:59,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 16:58:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:58:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:58:59,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:59,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 16:58:59,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 16:58:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:58:59,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671807973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:59,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:59,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 29 [2021-12-06 16:58:59,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525113430] [2021-12-06 16:58:59,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:59,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 16:58:59,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 16:58:59,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-12-06 16:58:59,467 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:01,533 INFO L93 Difference]: Finished difference Result 265 states and 309 transitions. [2021-12-06 16:59:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 16:59:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 16:59:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:01,535 INFO L225 Difference]: With dead ends: 265 [2021-12-06 16:59:01,535 INFO L226 Difference]: Without dead ends: 263 [2021-12-06 16:59:01,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1423, Invalid=9083, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 16:59:01,538 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 553 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:01,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 222 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 16:59:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-06 16:59:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 68. [2021-12-06 16:59:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-12-06 16:59:01,546 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 38 [2021-12-06 16:59:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:01,546 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-12-06 16:59:01,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-12-06 16:59:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 16:59:01,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:01,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:01,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 16:59:01,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 16:59:01,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2021-12-06 16:59:01,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:01,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627772776] [2021-12-06 16:59:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:01,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:02,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627772776] [2021-12-06 16:59:02,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627772776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93031175] [2021-12-06 16:59:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:02,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:02,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:02,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 16:59:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 16:59:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:02,338 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 16:59:02,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 16:59:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:59:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:59:02,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:02,579 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 16:59:02,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 16:59:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:59:02,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93031175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:02,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:02,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 10] total 32 [2021-12-06 16:59:02,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771051370] [2021-12-06 16:59:02,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:02,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 16:59:02,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 16:59:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-12-06 16:59:02,605 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:04,105 INFO L93 Difference]: Finished difference Result 233 states and 281 transitions. [2021-12-06 16:59:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 16:59:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 16:59:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:04,107 INFO L225 Difference]: With dead ends: 233 [2021-12-06 16:59:04,107 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 16:59:04,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=985, Invalid=5495, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 16:59:04,109 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 385 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:04,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 164 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 16:59:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 16:59:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 60. [2021-12-06 16:59:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-06 16:59:04,116 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 38 [2021-12-06 16:59:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:04,116 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-06 16:59:04,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-06 16:59:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 16:59:04,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:04,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:04,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 16:59:04,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 16:59:04,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 409588504, now seen corresponding path program 6 times [2021-12-06 16:59:04,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:04,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516380462] [2021-12-06 16:59:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:04,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:59:04,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516380462] [2021-12-06 16:59:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516380462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547370727] [2021-12-06 16:59:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 16:59:04,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:04,502 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:04,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 16:59:04,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 16:59:04,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 16:59:04,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:04,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 16:59:04,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:59:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:59:04,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 16:59:04,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 16:59:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:59:04,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547370727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:04,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:04,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2021-12-06 16:59:04,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263732039] [2021-12-06 16:59:04,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:04,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 16:59:04,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:04,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 16:59:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-06 16:59:04,795 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:05,196 INFO L93 Difference]: Finished difference Result 160 states and 201 transitions. [2021-12-06 16:59:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 16:59:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 16:59:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:05,198 INFO L225 Difference]: With dead ends: 160 [2021-12-06 16:59:05,198 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 16:59:05,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 16:59:05,199 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:05,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 197 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 16:59:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 16:59:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 80. [2021-12-06 16:59:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-12-06 16:59:05,207 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 42 [2021-12-06 16:59:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:05,207 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-12-06 16:59:05,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-12-06 16:59:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 16:59:05,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:05,208 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:05,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 16:59:05,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 16:59:05,409 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 1 times [2021-12-06 16:59:05,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:05,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606774483] [2021-12-06 16:59:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:05,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:05,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:05,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606774483] [2021-12-06 16:59:05,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606774483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844663752] [2021-12-06 16:59:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:05,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:05,926 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:05,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 16:59:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 16:59:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:06,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:59:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 16:59:06,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:06,261 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 16:59:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 16:59:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 16:59:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844663752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:06,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:06,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 11] total 35 [2021-12-06 16:59:06,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539809235] [2021-12-06 16:59:06,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:06,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 16:59:06,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 16:59:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 16:59:06,284 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:07,431 INFO L93 Difference]: Finished difference Result 233 states and 285 transitions. [2021-12-06 16:59:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 16:59:07,431 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 16:59:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:07,432 INFO L225 Difference]: With dead ends: 233 [2021-12-06 16:59:07,432 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 16:59:07,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 16:59:07,434 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 307 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:07,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 197 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 16:59:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 16:59:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 63. [2021-12-06 16:59:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-12-06 16:59:07,441 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2021-12-06 16:59:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:07,441 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-12-06 16:59:07,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-12-06 16:59:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 16:59:07,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:07,442 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:07,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 16:59:07,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 16:59:07,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1670167694, now seen corresponding path program 7 times [2021-12-06 16:59:07,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:07,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195486481] [2021-12-06 16:59:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:07,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 16:59:07,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195486481] [2021-12-06 16:59:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195486481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316468688] [2021-12-06 16:59:07,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 16:59:07,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:07,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:07,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:07,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 16:59:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 16:59:07,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 16:59:07,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 16:59:07,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316468688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:07,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:07,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 16:59:07,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107331612] [2021-12-06 16:59:07,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:07,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 16:59:07,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 16:59:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 16:59:07,915 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:08,061 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-12-06 16:59:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 16:59:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 16:59:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:08,062 INFO L225 Difference]: With dead ends: 112 [2021-12-06 16:59:08,062 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 16:59:08,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-12-06 16:59:08,063 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 139 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:08,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 96 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:59:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 16:59:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-12-06 16:59:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-06 16:59:08,072 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 46 [2021-12-06 16:59:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:08,072 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-06 16:59:08,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-06 16:59:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 16:59:08,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:08,073 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:08,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 16:59:08,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 16:59:08,273 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1173702100, now seen corresponding path program 8 times [2021-12-06 16:59:08,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949059243] [2021-12-06 16:59:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:08,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 16:59:08,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949059243] [2021-12-06 16:59:08,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949059243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558280278] [2021-12-06 16:59:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 16:59:08,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:08,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:08,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 16:59:08,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 16:59:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 16:59:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 16:59:08,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 16:59:08,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558280278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:08,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:08,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2021-12-06 16:59:08,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813788409] [2021-12-06 16:59:08,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:08,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 16:59:08,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:08,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 16:59:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 16:59:08,893 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:09,304 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-12-06 16:59:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 16:59:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 16:59:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:09,305 INFO L225 Difference]: With dead ends: 81 [2021-12-06 16:59:09,305 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 16:59:09,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 16:59:09,306 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 286 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:09,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 138 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 16:59:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 16:59:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-06 16:59:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-06 16:59:09,312 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2021-12-06 16:59:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:09,312 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-06 16:59:09,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-06 16:59:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 16:59:09,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:09,313 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:09,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 16:59:09,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:09,514 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash -49846830, now seen corresponding path program 9 times [2021-12-06 16:59:09,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:09,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135802872] [2021-12-06 16:59:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:09,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 16:59:09,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135802872] [2021-12-06 16:59:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135802872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387653665] [2021-12-06 16:59:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 16:59:09,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:09,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:09,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:09,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 16:59:09,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 16:59:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 16:59:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:59:09,886 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 16:59:09,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 16:59:10,047 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 16:59:10,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-12-06 16:59:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 16:59:10,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:10,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 16:59:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 16:59:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 16:59:10,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387653665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:10,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:10,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 31 [2021-12-06 16:59:10,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954269992] [2021-12-06 16:59:10,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:10,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 16:59:10,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:10,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 16:59:10,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-12-06 16:59:10,242 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:11,585 INFO L93 Difference]: Finished difference Result 347 states and 424 transitions. [2021-12-06 16:59:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 16:59:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 16:59:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:11,587 INFO L225 Difference]: With dead ends: 347 [2021-12-06 16:59:11,587 INFO L226 Difference]: Without dead ends: 300 [2021-12-06 16:59:11,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=826, Invalid=6656, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 16:59:11,590 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 593 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:11,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 343 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 16:59:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-06 16:59:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 79. [2021-12-06 16:59:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 78 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2021-12-06 16:59:11,604 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 53 [2021-12-06 16:59:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:11,604 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2021-12-06 16:59:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2021-12-06 16:59:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 16:59:11,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:11,605 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:11,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 16:59:11,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 16:59:11,806 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:11,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2124223606, now seen corresponding path program 2 times [2021-12-06 16:59:11,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232376248] [2021-12-06 16:59:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:11,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:12,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:12,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232376248] [2021-12-06 16:59:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232376248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:12,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602715193] [2021-12-06 16:59:12,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 16:59:12,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:12,523 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:12,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 16:59:12,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 16:59:12,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 16:59:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:12,678 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 16:59:12,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 16:59:12,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:59:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 16:59:12,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:12,891 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 16:59:12,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 16:59:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 16:59:12,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602715193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:12,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:12,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 13] total 35 [2021-12-06 16:59:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040650985] [2021-12-06 16:59:12,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:12,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 16:59:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 16:59:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 16:59:12,924 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:14,623 INFO L93 Difference]: Finished difference Result 288 states and 376 transitions. [2021-12-06 16:59:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 16:59:14,623 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 16:59:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:14,625 INFO L225 Difference]: With dead ends: 288 [2021-12-06 16:59:14,625 INFO L226 Difference]: Without dead ends: 286 [2021-12-06 16:59:14,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=715, Invalid=5291, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 16:59:14,627 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 482 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:14,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 274 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 16:59:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-06 16:59:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 73. [2021-12-06 16:59:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-12-06 16:59:14,636 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 55 [2021-12-06 16:59:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:14,637 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-12-06 16:59:14,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-12-06 16:59:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 16:59:14,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:14,637 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:14,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 16:59:14,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:14,839 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 828798828, now seen corresponding path program 2 times [2021-12-06 16:59:14,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913741914] [2021-12-06 16:59:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:14,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:15,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:15,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913741914] [2021-12-06 16:59:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913741914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837433297] [2021-12-06 16:59:15,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 16:59:15,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:15,400 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:15,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 16:59:15,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 16:59:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 16:59:15,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:15,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:59:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 16:59:15,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:15,819 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 16:59:15,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 16:59:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 16:59:15,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837433297] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:15,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:15,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 14] total 39 [2021-12-06 16:59:15,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318799990] [2021-12-06 16:59:15,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 16:59:15,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 16:59:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 16:59:15,854 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:18,853 INFO L93 Difference]: Finished difference Result 464 states and 616 transitions. [2021-12-06 16:59:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 16:59:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 16:59:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:18,856 INFO L225 Difference]: With dead ends: 464 [2021-12-06 16:59:18,856 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 16:59:18,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1576, Invalid=12230, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 16:59:18,859 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1107 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:18,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 313 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 16:59:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 16:59:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 64. [2021-12-06 16:59:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-12-06 16:59:18,872 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 59 [2021-12-06 16:59:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:18,872 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-12-06 16:59:18,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-12-06 16:59:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 16:59:18,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:18,873 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:18,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 16:59:19,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:19,074 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2140830112, now seen corresponding path program 10 times [2021-12-06 16:59:19,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:19,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471278036] [2021-12-06 16:59:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:19,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 16:59:19,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471278036] [2021-12-06 16:59:19,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471278036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023636444] [2021-12-06 16:59:19,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 16:59:19,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:19,213 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:19,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 16:59:19,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 16:59:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:19,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 16:59:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 16:59:19,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 16:59:19,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023636444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:19,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:19,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-06 16:59:19,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001327389] [2021-12-06 16:59:19,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:19,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 16:59:19,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:19,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 16:59:19,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-06 16:59:19,456 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:19,662 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2021-12-06 16:59:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 16:59:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 16:59:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:19,663 INFO L225 Difference]: With dead ends: 176 [2021-12-06 16:59:19,663 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 16:59:19,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 16:59:19,664 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 293 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:19,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 116 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 16:59:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 16:59:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2021-12-06 16:59:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-12-06 16:59:19,674 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2021-12-06 16:59:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:19,674 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-12-06 16:59:19,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-12-06 16:59:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 16:59:19,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:19,675 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:19,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 16:59:19,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:19,876 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash -771049342, now seen corresponding path program 11 times [2021-12-06 16:59:19,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:19,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753299120] [2021-12-06 16:59:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:19,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 16:59:20,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:20,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753299120] [2021-12-06 16:59:20,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753299120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:20,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247350759] [2021-12-06 16:59:20,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 16:59:20,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:20,140 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:20,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 16:59:20,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 16:59:20,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 16:59:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 16:59:20,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 16:59:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247350759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:21,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:21,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2021-12-06 16:59:21,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443740365] [2021-12-06 16:59:21,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:21,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 16:59:21,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 16:59:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 16:59:21,150 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:21,494 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-12-06 16:59:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 16:59:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 16:59:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:21,495 INFO L225 Difference]: With dead ends: 112 [2021-12-06 16:59:21,495 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 16:59:21,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1945, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 16:59:21,497 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 303 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:21,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 111 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 16:59:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 16:59:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-12-06 16:59:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-12-06 16:59:21,507 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 65 [2021-12-06 16:59:21,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:21,507 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-12-06 16:59:21,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-12-06 16:59:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 16:59:21,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:21,508 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:21,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 16:59:21,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 16:59:21,709 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1827931244, now seen corresponding path program 12 times [2021-12-06 16:59:21,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:21,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758930033] [2021-12-06 16:59:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:21,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 16:59:22,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758930033] [2021-12-06 16:59:22,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758930033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215973746] [2021-12-06 16:59:22,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 16:59:22,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:22,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:22,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 16:59:22,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 16:59:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 16:59:22,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:59:22,365 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 16:59:22,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 16:59:22,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 16:59:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 16:59:22,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:22,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 16:59:22,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 16:59:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 16:59:22,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215973746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:22,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:22,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2021-12-06 16:59:22,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883361011] [2021-12-06 16:59:22,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:22,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 16:59:22,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 16:59:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 16:59:22,774 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 37 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:28,303 INFO L93 Difference]: Finished difference Result 781 states and 1040 transitions. [2021-12-06 16:59:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-12-06 16:59:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 37 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 16:59:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:28,306 INFO L225 Difference]: With dead ends: 781 [2021-12-06 16:59:28,306 INFO L226 Difference]: Without dead ends: 704 [2021-12-06 16:59:28,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15064 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3565, Invalid=35047, Unknown=0, NotChecked=0, Total=38612 [2021-12-06 16:59:28,309 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 2005 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 1452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1452 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:28,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 345 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1452 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 16:59:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-06 16:59:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 84. [2021-12-06 16:59:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-12-06 16:59:28,324 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 70 [2021-12-06 16:59:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:28,324 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-12-06 16:59:28,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 37 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-12-06 16:59:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 16:59:28,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:28,325 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:28,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 16:59:28,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 16:59:28,526 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash -803080396, now seen corresponding path program 3 times [2021-12-06 16:59:28,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494235720] [2021-12-06 16:59:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:28,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:29,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494235720] [2021-12-06 16:59:29,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494235720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294607707] [2021-12-06 16:59:29,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 16:59:29,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:29,516 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:29,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 16:59:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 16:59:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 16:59:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:29,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:59:29,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-12-06 16:59:29,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 16:59:29,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 16:59:29,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-12-06 16:59:30,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 16:59:30,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 16 [2021-12-06 16:59:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 16:59:30,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:30,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-12-06 16:59:30,759 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-12-06 16:59:30,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 72 [2021-12-06 16:59:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 102 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 16:59:30,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294607707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:30,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:30,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 17] total 53 [2021-12-06 16:59:30,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532560612] [2021-12-06 16:59:30,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:30,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 16:59:30,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 16:59:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2464, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 16:59:30,863 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:41,327 INFO L93 Difference]: Finished difference Result 1323 states and 1821 transitions. [2021-12-06 16:59:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-12-06 16:59:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-06 16:59:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:41,333 INFO L225 Difference]: With dead ends: 1323 [2021-12-06 16:59:41,333 INFO L226 Difference]: Without dead ends: 1321 [2021-12-06 16:59:41,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24037 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=5025, Invalid=60767, Unknown=0, NotChecked=0, Total=65792 [2021-12-06 16:59:41,338 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3100 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 2661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3100 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 5413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2661 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:41,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3100 Valid, 478 Invalid, 5413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2661 Valid, 2752 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 16:59:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-12-06 16:59:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 94. [2021-12-06 16:59:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 93 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2021-12-06 16:59:41,375 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 72 [2021-12-06 16:59:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:41,376 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2021-12-06 16:59:41,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2021-12-06 16:59:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 16:59:41,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:41,376 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:41,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 16:59:41,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:41,577 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash 578767658, now seen corresponding path program 3 times [2021-12-06 16:59:41,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:41,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945925033] [2021-12-06 16:59:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:41,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:42,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:42,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945925033] [2021-12-06 16:59:42,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945925033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:42,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196849944] [2021-12-06 16:59:42,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 16:59:42,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:42,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:42,652 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:42,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 16:59:42,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 16:59:42,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 16:59:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:59:43,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 16:59:44,149 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 16:59:44,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-12-06 16:59:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 106 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 16:59:44,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-12-06 16:59:52,320 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 16:59:52,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 222 [2021-12-06 16:59:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 84 proven. 48 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 16:59:54,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196849944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:54,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:54,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 23] total 72 [2021-12-06 16:59:54,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685676816] [2021-12-06 16:59:54,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:54,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 16:59:54,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 16:59:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=4507, Unknown=5, NotChecked=0, Total=5112 [2021-12-06 16:59:54,761 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 72 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:59,396 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2021-12-06 16:59:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 16:59:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 16:59:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:59,397 INFO L225 Difference]: With dead ends: 170 [2021-12-06 16:59:59,397 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 16:59:59,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1523, Invalid=11808, Unknown=9, NotChecked=0, Total=13340 [2021-12-06 16:59:59,399 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 168 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:59,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 561 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 658 Invalid, 0 Unknown, 286 Unchecked, 0.3s Time] [2021-12-06 16:59:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 16:59:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-06 16:59:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2021-12-06 16:59:59,419 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 76 [2021-12-06 16:59:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:59,419 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2021-12-06 16:59:59,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2021-12-06 16:59:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 16:59:59,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:59,420 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:59,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 16:59:59,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 16:59:59,621 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 660531224, now seen corresponding path program 4 times [2021-12-06 16:59:59,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:59,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884636645] [2021-12-06 16:59:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:59,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 16:59:59,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884636645] [2021-12-06 16:59:59,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884636645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976603937] [2021-12-06 16:59:59,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 16:59:59,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:59,953 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:59,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:00:00,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:00:00,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:00:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:00:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 55 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 17:00:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 55 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 17:00:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976603937] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:00,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:00:00,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 49 [2021-12-06 17:00:00,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636301415] [2021-12-06 17:00:00,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:00,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:00:00,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:00:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:00:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1862, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 17:00:00,751 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:01,323 INFO L93 Difference]: Finished difference Result 254 states and 302 transitions. [2021-12-06 17:00:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:00:01,324 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 17:00:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:01,324 INFO L225 Difference]: With dead ends: 254 [2021-12-06 17:00:01,325 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 17:00:01,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=857, Invalid=2925, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 17:00:01,325 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 295 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:01,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 108 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:00:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 17:00:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-12-06 17:00:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2021-12-06 17:00:01,346 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 81 [2021-12-06 17:00:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:01,346 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2021-12-06 17:00:01,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2021-12-06 17:00:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:00:01,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:01,347 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:01,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 17:00:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:00:01,548 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1793417948, now seen corresponding path program 5 times [2021-12-06 17:00:01,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:00:01,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749295450] [2021-12-06 17:00:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:01,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:00:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:00:01,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:00:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749295450] [2021-12-06 17:00:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749295450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:00:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561671703] [2021-12-06 17:00:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:00:01,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:00:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:00:01,951 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:00:01,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:00:02,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 17:00:02,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:00:02,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 17:00:02,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:02,590 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:00:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:00:02,603 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:00:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:00:02,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 17:00:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:00:02,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:02,969 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 17:00:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-12-06 17:00:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:00:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561671703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:03,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:00:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 19] total 36 [2021-12-06 17:00:03,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367988077] [2021-12-06 17:00:03,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 17:00:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:00:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 17:00:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:00:03,023 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:36,213 INFO L93 Difference]: Finished difference Result 6074 states and 8612 transitions. [2021-12-06 17:00:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 827 states. [2021-12-06 17:00:36,214 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:00:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:36,236 INFO L225 Difference]: With dead ends: 6074 [2021-12-06 17:00:36,236 INFO L226 Difference]: Without dead ends: 6072 [2021-12-06 17:00:36,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 156 SyntacticMatches, 19 SemanticMatches, 839 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336878 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=35169, Invalid=671271, Unknown=0, NotChecked=0, Total=706440 [2021-12-06 17:00:36,272 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 13647 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 10705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13647 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 13100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10705 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:36,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13647 Valid, 501 Invalid, 13100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10705 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 17:00:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-12-06 17:00:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 90. [2021-12-06 17:00:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.146067415730337) internal successors, (102), 89 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-12-06 17:00:36,317 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 85 [2021-12-06 17:00:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:36,317 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-12-06 17:00:36,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-12-06 17:00:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:00:36,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:36,318 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:36,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:00:36,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 17:00:36,519 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1687811988, now seen corresponding path program 13 times [2021-12-06 17:00:36,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:00:36,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952386246] [2021-12-06 17:00:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:36,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:00:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:00:37,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:00:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952386246] [2021-12-06 17:00:37,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952386246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:00:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643573666] [2021-12-06 17:00:37,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:00:37,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:00:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:00:37,302 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:00:37,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:00:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:37,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 17:00:37,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:37,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:00:37,535 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 17:00:37,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 17:00:37,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 17:00:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:00:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 17:00:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 17:00:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:00:38,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643573666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:38,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:00:38,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 47 [2021-12-06 17:00:38,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124387331] [2021-12-06 17:00:38,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:38,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:00:38,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:00:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:00:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 17:00:38,009 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 47 states, 47 states have (on average 3.4468085106382977) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:01:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:48,216 INFO L93 Difference]: Finished difference Result 3222 states and 4486 transitions. [2021-12-06 17:01:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1075 states. [2021-12-06 17:01:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4468085106382977) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 17:01:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:48,228 INFO L225 Difference]: With dead ends: 3222 [2021-12-06 17:01:48,228 INFO L226 Difference]: Without dead ends: 3220 [2021-12-06 17:01:48,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 162 SyntacticMatches, 4 SemanticMatches, 1108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574435 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=37632, Invalid=1193358, Unknown=0, NotChecked=0, Total=1230990 [2021-12-06 17:01:48,284 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 18181 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 14759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18181 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 17807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14759 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:48,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18181 Valid, 586 Invalid, 17807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14759 Valid, 3048 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-12-06 17:01:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-12-06 17:01:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 101. [2021-12-06 17:01:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:01:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2021-12-06 17:01:48,325 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 89 [2021-12-06 17:01:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:48,326 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2021-12-06 17:01:48,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4468085106382977) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:01:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2021-12-06 17:01:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:01:48,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:48,326 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:48,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 17:01:48,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:01:48,527 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2111458710, now seen corresponding path program 4 times [2021-12-06 17:01:48,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:01:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055654053] [2021-12-06 17:01:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:48,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:01:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:01:49,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:01:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055654053] [2021-12-06 17:01:49,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055654053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:01:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001115796] [2021-12-06 17:01:49,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:01:49,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:01:49,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:01:49,300 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:01:49,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:01:49,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:01:49,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:01:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:01:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:49,551 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 17:01:49,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 17:01:49,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 17:01:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:01:49,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:49,989 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 17:01:49,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 17:01:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:01:50,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001115796] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:50,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:01:50,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19, 19] total 50 [2021-12-06 17:01:50,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452640914] [2021-12-06 17:01:50,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:50,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 17:01:50,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:01:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 17:01:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:01:50,033 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:02:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:02:19,713 INFO L93 Difference]: Finished difference Result 3212 states and 4476 transitions. [2021-12-06 17:02:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2021-12-06 17:02:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 17:02:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:02:19,725 INFO L225 Difference]: With dead ends: 3212 [2021-12-06 17:02:19,725 INFO L226 Difference]: Without dead ends: 3210 [2021-12-06 17:02:19,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117524 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=12226, Invalid=261826, Unknown=0, NotChecked=0, Total=274052 [2021-12-06 17:02:19,734 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 8552 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 7227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8552 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 10397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7227 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:02:19,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8552 Valid, 514 Invalid, 10397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7227 Valid, 3170 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 17:02:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-12-06 17:02:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 94. [2021-12-06 17:02:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:02:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2021-12-06 17:02:19,783 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 89 [2021-12-06 17:02:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:02:19,783 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2021-12-06 17:02:19,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:02:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2021-12-06 17:02:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 17:02:19,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:02:19,784 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:02:19,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 17:02:19,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 17:02:19,984 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:02:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:02:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash 433996554, now seen corresponding path program 14 times [2021-12-06 17:02:19,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:02:19,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050945835] [2021-12-06 17:02:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:02:19,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:02:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:02:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:02:20,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:02:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050945835] [2021-12-06 17:02:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050945835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:02:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310982456] [2021-12-06 17:02:20,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:02:20,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:02:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:02:20,803 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:02:20,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:02:20,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:02:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:02:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 17:02:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:02:21,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 17:02:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:02:21,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:02:21,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 17:02:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 17:02:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:02:21,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310982456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:02:21,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:02:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 19] total 50 [2021-12-06 17:02:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858770584] [2021-12-06 17:02:21,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:02:21,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 17:02:21,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:02:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 17:02:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:02:21,418 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:25,534 INFO L93 Difference]: Finished difference Result 6431 states and 8975 transitions. [2021-12-06 17:05:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2148 states. [2021-12-06 17:05:25,535 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 17:05:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:25,560 INFO L225 Difference]: With dead ends: 6431 [2021-12-06 17:05:25,560 INFO L226 Difference]: Without dead ends: 6429 [2021-12-06 17:05:25,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2352 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 2181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333862 ImplicationChecksByTransitivity, 160.4s TimeCoverageRelationStatistics Valid=164476, Invalid=4598830, Unknown=0, NotChecked=0, Total=4763306 [2021-12-06 17:05:25,819 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29109 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 25167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29109 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 28878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25167 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:25,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29109 Valid, 656 Invalid, 28878 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25167 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2021-12-06 17:05:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2021-12-06 17:05:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 107. [2021-12-06 17:05:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.169811320754717) internal successors, (124), 106 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-12-06 17:05:25,884 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 93 [2021-12-06 17:05:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:25,884 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-12-06 17:05:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-12-06 17:05:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 17:05:25,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:25,884 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:25,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 17:05:26,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:26,086 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash -463396724, now seen corresponding path program 6 times [2021-12-06 17:05:26,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:26,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968103672] [2021-12-06 17:05:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:26,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:27,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968103672] [2021-12-06 17:05:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968103672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974379127] [2021-12-06 17:05:27,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:05:27,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:27,392 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:27,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:05:28,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 17:05:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:05:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 17:05:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:28,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:05:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:05:30,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:05:30,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:05:30,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 21 [2021-12-06 17:05:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 120 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:05:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-12-06 17:05:31,631 INFO L354 Elim1Store]: treesize reduction 9, result has 50.0 percent of original size [2021-12-06 17:05:31,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 92 [2021-12-06 17:05:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 84 proven. 133 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 17:05:32,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974379127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:32,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:32,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 24] total 88 [2021-12-06 17:05:32,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568654302] [2021-12-06 17:05:32,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:32,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 17:05:32,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 17:05:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=6943, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 17:05:32,169 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 88 states, 88 states have (on average 2.8863636363636362) internal successors, (254), 88 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:44,436 INFO L93 Difference]: Finished difference Result 365 states and 422 transitions. [2021-12-06 17:05:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 17:05:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.8863636363636362) internal successors, (254), 88 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 17:05:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:44,437 INFO L225 Difference]: With dead ends: 365 [2021-12-06 17:05:44,438 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 17:05:44,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 194 SyntacticMatches, 6 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9404 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3092, Invalid=27003, Unknown=7, NotChecked=0, Total=30102 [2021-12-06 17:05:44,440 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 404 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1790 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:44,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 832 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1193 Invalid, 0 Unknown, 1790 Unchecked, 0.5s Time] [2021-12-06 17:05:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 17:05:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 111. [2021-12-06 17:05:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-12-06 17:05:44,506 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 93 [2021-12-06 17:05:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:44,506 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-12-06 17:05:44,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.8863636363636362) internal successors, (254), 88 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-12-06 17:05:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 17:05:44,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:44,507 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:44,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-06 17:05:44,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:44,708 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1852795470, now seen corresponding path program 7 times [2021-12-06 17:05:44,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515259680] [2021-12-06 17:05:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:44,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 60 proven. 121 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 17:05:45,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515259680] [2021-12-06 17:05:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515259680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477998541] [2021-12-06 17:05:45,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:05:45,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:45,122 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:45,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:05:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:05:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 17:05:45,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 17:05:46,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477998541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:46,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:46,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 58 [2021-12-06 17:05:46,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304609535] [2021-12-06 17:05:46,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:46,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:05:46,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:05:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=2611, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:05:46,253 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:47,002 INFO L93 Difference]: Finished difference Result 276 states and 321 transitions. [2021-12-06 17:05:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 17:05:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-06 17:05:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:47,004 INFO L225 Difference]: With dead ends: 276 [2021-12-06 17:05:47,004 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 17:05:47,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1159, Invalid=3953, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 17:05:47,005 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 589 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:47,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 97 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:05:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 17:05:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 115. [2021-12-06 17:05:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-12-06 17:05:47,071 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 98 [2021-12-06 17:05:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:47,071 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-12-06 17:05:47,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-12-06 17:05:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 17:05:47,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:47,072 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 9, 9, 9, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:47,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 17:05:47,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 17:05:47,273 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash -316846070, now seen corresponding path program 8 times [2021-12-06 17:05:47,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495856084] [2021-12-06 17:05:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:47,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:47,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495856084] [2021-12-06 17:05:47,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495856084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418588406] [2021-12-06 17:05:47,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:05:47,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:47,773 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:47,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:05:47,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:05:47,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:05:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:05:47,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:47,988 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:05:47,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:05:47,999 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:05:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:05:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 17:05:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:05:48,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:48,804 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-12-06 17:05:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-12-06 17:05:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 17:05:48,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418588406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:48,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:48,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 23] total 43 [2021-12-06 17:05:48,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233118036] [2021-12-06 17:05:48,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:48,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:05:48,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:05:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1647, Unknown=1, NotChecked=0, Total=1806 [2021-12-06 17:05:48,875 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:20,702 INFO L93 Difference]: Finished difference Result 24108 states and 34316 transitions. [2021-12-06 17:10:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3191 states. [2021-12-06 17:10:20,702 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-06 17:10:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:20,744 INFO L225 Difference]: With dead ends: 24108 [2021-12-06 17:10:20,744 INFO L226 Difference]: Without dead ends: 24106 [2021-12-06 17:10:21,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3415 GetRequests, 188 SyntacticMatches, 21 SemanticMatches, 3206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5095740 ImplicationChecksByTransitivity, 208.9s TimeCoverageRelationStatistics Valid=282946, Invalid=10005109, Unknown=1, NotChecked=0, Total=10288056 [2021-12-06 17:10:21,456 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 66687 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 3973 mSolverCounterSat, 52711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66687 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 56688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52711 IncrementalHoareTripleChecker+Valid, 3973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:21,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66687 Valid, 756 Invalid, 56688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52711 Valid, 3973 Invalid, 0 Unknown, 4 Unchecked, 26.6s Time] [2021-12-06 17:10:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24106 states. [2021-12-06 17:10:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24106 to 107. [2021-12-06 17:10:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 106 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2021-12-06 17:10:21,591 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 102 [2021-12-06 17:10:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:21,591 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2021-12-06 17:10:21,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2021-12-06 17:10:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 17:10:21,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:21,592 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:21,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 17:10:21,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:10:21,793 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash 734215106, now seen corresponding path program 15 times [2021-12-06 17:10:21,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:21,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522684157] [2021-12-06 17:10:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:21,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:10:22,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:22,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522684157] [2021-12-06 17:10:22,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522684157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:10:22,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861828685] [2021-12-06 17:10:22,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:10:22,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:10:22,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:10:22,930 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:10:22,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf9132b-0a88-4dbc-8cd1-c88e8e34d409/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:10:24,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 17:10:24,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:10:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:10:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:10:24,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:10:24,475 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 17:10:24,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 17:10:24,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 17:10:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 17:10:24,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:10:25,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 17:10:25,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 17:10:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 17:10:25,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861828685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:10:25,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:10:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21, 21] total 55 [2021-12-06 17:10:25,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453041800] [2021-12-06 17:10:25,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:10:25,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 17:10:25,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 17:10:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 17:10:25,185 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 55 states, 55 states have (on average 3.4909090909090907) internal successors, (192), 55 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)