./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/skipped.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:48:58,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:48:58,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:48:58,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:48:58,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:48:58,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:48:58,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:48:58,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:48:58,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:48:58,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:48:58,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:48:58,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:48:58,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:48:58,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:48:58,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:48:58,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:48:58,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:48:58,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:48:58,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:48:58,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:48:58,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:48:58,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:48:58,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:48:58,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:48:58,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:48:58,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:48:58,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:48:58,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:48:58,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:48:58,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:48:58,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:48:58,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:48:58,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:48:58,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:48:58,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:48:58,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:48:58,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:48:58,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:48:58,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:48:58,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:48:58,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:48:58,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:48:58,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:48:58,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:48:58,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:48:58,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:48:58,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:48:58,959 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:48:58,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:48:58,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:48:58,960 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:48:58,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:48:58,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:48:58,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:48:58,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:48:58,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:48:58,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:48:58,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:48:58,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:48:58,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:48:58,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:48:58,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:48:58,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:48:58,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:48:58,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:48:58,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:48:58,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:48:58,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:48:58,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:48:58,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:48:58,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:48:58,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:48:58,968 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:48:58,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:48:58,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:48:58,969 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_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 [2022-10-17 10:48:59,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:48:59,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:48:59,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:48:59,314 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:48:59,315 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:48:59,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/array-tiling/skipped.c [2022-10-17 10:48:59,396 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/data/d12e047e6/06293fcb52b34fc6bad143af62954854/FLAG96499f04d [2022-10-17 10:49:00,027 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:49:00,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/sv-benchmarks/c/array-tiling/skipped.c [2022-10-17 10:49:00,034 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/data/d12e047e6/06293fcb52b34fc6bad143af62954854/FLAG96499f04d [2022-10-17 10:49:00,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/data/d12e047e6/06293fcb52b34fc6bad143af62954854 [2022-10-17 10:49:00,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:49:00,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:49:00,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:49:00,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:49:00,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:49:00,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cfdf6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00, skipping insertion in model container [2022-10-17 10:49:00,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:49:00,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:49:00,632 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_471df2df-4a69-4738-aa44-c3151c1d980d/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2022-10-17 10:49:00,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:49:00,664 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:49:00,677 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_471df2df-4a69-4738-aa44-c3151c1d980d/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2022-10-17 10:49:00,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:49:00,701 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:49:00,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00 WrapperNode [2022-10-17 10:49:00,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:49:00,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:49:00,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:49:00,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:49:00,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,744 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-10-17 10:49:00,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:49:00,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:49:00,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:49:00,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:49:00,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:49:00,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:49:00,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:49:00,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:49:00,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (1/1) ... [2022-10-17 10:49:00,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:49:00,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:00,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:49:00,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:49:00,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:49:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:49:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:49:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:49:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:49:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:49:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:49:00,966 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:49:00,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:49:01,146 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:49:01,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:49:01,154 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:49:01,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:49:01 BoogieIcfgContainer [2022-10-17 10:49:01,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:49:01,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:49:01,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:49:01,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:49:01,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:49:00" (1/3) ... [2022-10-17 10:49:01,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ee4cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:49:01, skipping insertion in model container [2022-10-17 10:49:01,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:49:00" (2/3) ... [2022-10-17 10:49:01,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ee4cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:49:01, skipping insertion in model container [2022-10-17 10:49:01,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:49:01" (3/3) ... [2022-10-17 10:49:01,177 INFO L112 eAbstractionObserver]: Analyzing ICFG skipped.c [2022-10-17 10:49:01,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:49:01,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:49:01,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:49:01,270 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f2fd850, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:49:01,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:49:01,283 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) [2022-10-17 10:49:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:49:01,297 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:01,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:01,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2022-10-17 10:49:01,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:01,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389394853] [2022-10-17 10:49:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:01,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:01,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389394853] [2022-10-17 10:49:01,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389394853] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:49:01,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:49:01,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:49:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878001532] [2022-10-17 10:49:01,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:49:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:49:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:49:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:49:01,560 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) [2022-10-17 10:49:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:01,576 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2022-10-17 10:49:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:49:01,578 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 [2022-10-17 10:49:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:01,587 INFO L225 Difference]: With dead ends: 43 [2022-10-17 10:49:01,587 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 10:49:01,590 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:49:01,594 INFO L413 NwaCegarLoop]: 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 [2022-10-17 10:49:01,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:49:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 10:49:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-10-17 10:49:01,628 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) [2022-10-17 10:49:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-10-17 10:49:01,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2022-10-17 10:49:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:01,632 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-10-17 10:49:01,632 INFO L496 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) [2022-10-17 10:49:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-10-17 10:49:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:49:01,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:01,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:49:01,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2022-10-17 10:49:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:01,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060474964] [2022-10-17 10:49:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060474964] [2022-10-17 10:49:01,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060474964] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:49:01,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:49:01,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:49:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550010725] [2022-10-17 10:49:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:49:01,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:49:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:49:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:49:01,873 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) [2022-10-17 10:49:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:01,955 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-10-17 10:49:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:49:01,956 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 [2022-10-17 10:49:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:01,957 INFO L225 Difference]: With dead ends: 37 [2022-10-17 10:49:01,957 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 10:49:01,958 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:49:01,960 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:01,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 10:49:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-10-17 10:49:01,966 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) [2022-10-17 10:49:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-10-17 10:49:01,968 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-10-17 10:49:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:01,968 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-10-17 10:49:01,968 INFO L496 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) [2022-10-17 10:49:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-10-17 10:49:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 10:49:01,970 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:01,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:01,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:49:01,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:01,972 INFO L85 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2022-10-17 10:49:01,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:01,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581914896] [2022-10-17 10:49:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581914896] [2022-10-17 10:49:02,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581914896] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408052446] [2022-10-17 10:49:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:02,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:02,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:02,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:49:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:49:02,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:02,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408052446] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:02,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:02,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-17 10:49:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218897665] [2022-10-17 10:49:02,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:02,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:49:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:49:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:49:02,456 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) [2022-10-17 10:49:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:02,545 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-10-17 10:49:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:49:02,546 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 [2022-10-17 10:49:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:02,547 INFO L225 Difference]: With dead ends: 39 [2022-10-17 10:49:02,547 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 10:49:02,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:49:02,549 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:02,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 10:49:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-10-17 10:49:02,555 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) [2022-10-17 10:49:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-10-17 10:49:02,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2022-10-17 10:49:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:02,556 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-10-17 10:49:02,557 INFO L496 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) [2022-10-17 10:49:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-10-17 10:49:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:49:02,558 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:02,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:02,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:02,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:02,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2022-10-17 10:49:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159072241] [2022-10-17 10:49:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:03,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159072241] [2022-10-17 10:49:03,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159072241] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:49:03,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:49:03,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:49:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768142497] [2022-10-17 10:49:03,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:49:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:49:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:49:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:49:03,175 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) [2022-10-17 10:49:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:03,286 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-10-17 10:49:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:49:03,287 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 [2022-10-17 10:49:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:03,288 INFO L225 Difference]: With dead ends: 35 [2022-10-17 10:49:03,288 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 10:49:03,289 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:49:03,298 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:03,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 10:49:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-10-17 10:49:03,309 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) [2022-10-17 10:49:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-10-17 10:49:03,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-10-17 10:49:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:03,312 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-10-17 10:49:03,313 INFO L496 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) [2022-10-17 10:49:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-10-17 10:49:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:49:03,315 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:03,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:03,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:49:03,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2022-10-17 10:49:03,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:03,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840859343] [2022-10-17 10:49:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:03,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:03,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:03,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840859343] [2022-10-17 10:49:03,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840859343] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531771691] [2022-10-17 10:49:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:03,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:03,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:03,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:03,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:49:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:03,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:49:03,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:03,922 INFO L390 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 [2022-10-17 10:49:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:49:03,955 INFO L390 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 [2022-10-17 10:49:04,016 INFO L390 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 [2022-10-17 10:49:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:04,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:04,136 INFO L390 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 [2022-10-17 10:49:04,142 INFO L390 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 22 treesize of output 20 [2022-10-17 10:49:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:04,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531771691] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:04,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:04,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-10-17 10:49:04,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022926514] [2022-10-17 10:49:04,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:04,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:49:04,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:04,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:49:04,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:49:04,168 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) [2022-10-17 10:49:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:04,397 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-10-17 10:49:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:49:04,398 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 [2022-10-17 10:49:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:04,399 INFO L225 Difference]: With dead ends: 58 [2022-10-17 10:49:04,399 INFO L226 Difference]: Without dead ends: 56 [2022-10-17 10:49:04,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:49:04,402 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-10-17 10:49:04,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 90 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-17 10:49:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-10-17 10:49:04,410 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) [2022-10-17 10:49:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-10-17 10:49:04,412 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2022-10-17 10:49:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:04,412 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-10-17 10:49:04,412 INFO L496 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) [2022-10-17 10:49:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-10-17 10:49:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:49:04,414 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:04,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:04,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:04,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2022-10-17 10:49:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:04,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630475072] [2022-10-17 10:49:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:04,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:04,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630475072] [2022-10-17 10:49:04,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630475072] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543747581] [2022-10-17 10:49:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:04,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:04,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:04,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:49:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:49:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:05,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:49:05,119 INFO L390 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 [2022-10-17 10:49:05,178 INFO L390 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 [2022-10-17 10:49:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:05,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:05,309 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-17 10:49:05,309 INFO L390 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 [2022-10-17 10:49:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:05,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543747581] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:05,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:05,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2022-10-17 10:49:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764351284] [2022-10-17 10:49:05,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:05,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:49:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:49:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:49:05,326 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) [2022-10-17 10:49:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:05,529 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-10-17 10:49:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:49:05,530 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 [2022-10-17 10:49:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:05,531 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:49:05,532 INFO L226 Difference]: Without dead ends: 51 [2022-10-17 10:49:05,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:49:05,534 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-10-17 10:49:05,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 57 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-17 10:49:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2022-10-17 10:49:05,547 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) [2022-10-17 10:49:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-10-17 10:49:05,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2022-10-17 10:49:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:05,550 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-10-17 10:49:05,551 INFO L496 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) [2022-10-17 10:49:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-10-17 10:49:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:49:05,552 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:05,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:05,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:05,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1653781302, now seen corresponding path program 1 times [2022-10-17 10:49:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:05,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567031681] [2022-10-17 10:49:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567031681] [2022-10-17 10:49:06,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567031681] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:06,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935318272] [2022-10-17 10:49:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:06,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:06,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:06,178 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:06,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:49:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:49:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:06,288 INFO L390 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 [2022-10-17 10:49:06,371 INFO L390 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 [2022-10-17 10:49:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:06,465 INFO L390 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 [2022-10-17 10:49:06,471 INFO L390 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 24 treesize of output 20 [2022-10-17 10:49:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:06,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935318272] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:06,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:06,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2022-10-17 10:49:06,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787393815] [2022-10-17 10:49:06,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:49:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:49:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:49:06,499 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) [2022-10-17 10:49:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:06,778 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-10-17 10:49:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:49:06,778 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 [2022-10-17 10:49:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:06,780 INFO L225 Difference]: With dead ends: 63 [2022-10-17 10:49:06,780 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 10:49:06,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:49:06,781 INFO L413 NwaCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:06,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 96 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:49:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 10:49:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-10-17 10:49:06,792 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) [2022-10-17 10:49:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-10-17 10:49:06,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 25 [2022-10-17 10:49:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:06,793 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-10-17 10:49:06,794 INFO L496 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) [2022-10-17 10:49:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-10-17 10:49:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:49:06,795 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:06,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:06,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:07,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:07,018 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2022-10-17 10:49:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48690706] [2022-10-17 10:49:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:07,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48690706] [2022-10-17 10:49:07,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48690706] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:07,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900539708] [2022-10-17 10:49:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:07,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:07,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:49:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:49:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:07,751 INFO L390 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 [2022-10-17 10:49:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:49:07,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:07,861 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-17 10:49:07,862 INFO L390 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 [2022-10-17 10:49:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:07,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900539708] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:07,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:07,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 14 [2022-10-17 10:49:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462519454] [2022-10-17 10:49:07,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:07,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:49:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:07,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:49:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:49:07,888 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) [2022-10-17 10:49:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:08,124 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-10-17 10:49:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:49:08,125 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 [2022-10-17 10:49:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:08,126 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:49:08,126 INFO L226 Difference]: Without dead ends: 51 [2022-10-17 10:49:08,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:49:08,127 INFO L413 NwaCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:08,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:49:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-17 10:49:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-10-17 10:49:08,135 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) [2022-10-17 10:49:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-10-17 10:49:08,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2022-10-17 10:49:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:08,136 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-10-17 10:49:08,136 INFO L496 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) [2022-10-17 10:49:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-10-17 10:49:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:49:08,137 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:08,137 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:08,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:08,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:08,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 2 times [2022-10-17 10:49:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016557239] [2022-10-17 10:49:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:49:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016557239] [2022-10-17 10:49:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016557239] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587179574] [2022-10-17 10:49:08,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:49:08,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:08,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:08,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:08,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:49:08,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:49:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:49:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:49:08,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:49:08,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587179574] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:08,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:08,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-10-17 10:49:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494141284] [2022-10-17 10:49:08,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:49:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:49:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:49:08,770 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) [2022-10-17 10:49:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:08,987 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-10-17 10:49:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:49:08,988 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 [2022-10-17 10:49:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:08,988 INFO L225 Difference]: With dead ends: 88 [2022-10-17 10:49:08,989 INFO L226 Difference]: Without dead ends: 51 [2022-10-17 10:49:08,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:49:08,990 INFO L413 NwaCegarLoop]: 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 [2022-10-17 10:49:08,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:08,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-17 10:49:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2022-10-17 10:49:08,998 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) [2022-10-17 10:49:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-10-17 10:49:08,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-10-17 10:49:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:08,999 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-10-17 10:49:08,999 INFO L496 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) [2022-10-17 10:49:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-10-17 10:49:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-17 10:49:09,000 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:09,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:09,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:09,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:09,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 3 times [2022-10-17 10:49:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:09,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911047613] [2022-10-17 10:49:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:49:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:09,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911047613] [2022-10-17 10:49:09,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911047613] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:09,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702564274] [2022-10-17 10:49:09,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:49:09,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:09,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:09,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:49:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 10:49:09,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:49:09,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:49:09,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:49:10,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702564274] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:10,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:10,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2022-10-17 10:49:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827279505] [2022-10-17 10:49:10,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:49:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:49:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:49:10,096 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) [2022-10-17 10:49:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:10,559 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-10-17 10:49:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:49:10,560 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 [2022-10-17 10:49:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:10,561 INFO L225 Difference]: With dead ends: 62 [2022-10-17 10:49:10,561 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 10:49:10,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 10:49:10,563 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 219 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:10,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 70 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:49:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 10:49:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2022-10-17 10:49:10,571 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) [2022-10-17 10:49:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-10-17 10:49:10,572 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2022-10-17 10:49:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-10-17 10:49:10,573 INFO L496 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) [2022-10-17 10:49:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-10-17 10:49:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:49:10,574 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:10,574 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:10,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:10,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:49:10,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 4 times [2022-10-17 10:49:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:10,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383082579] [2022-10-17 10:49:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:49:11,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383082579] [2022-10-17 10:49:11,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383082579] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:11,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324864286] [2022-10-17 10:49:11,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:49:11,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:11,222 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:11,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:49:11,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:49:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:49:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:49:11,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:49:11,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324864286] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:11,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:11,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-10-17 10:49:11,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929144525] [2022-10-17 10:49:11,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:11,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:49:11,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:49:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:49:11,797 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) [2022-10-17 10:49:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:12,150 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-10-17 10:49:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:49:12,151 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 [2022-10-17 10:49:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:12,152 INFO L225 Difference]: With dead ends: 76 [2022-10-17 10:49:12,152 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 10:49:12,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-10-17 10:49:12,154 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:12,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 84 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:49:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 10:49:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2022-10-17 10:49:12,164 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) [2022-10-17 10:49:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-10-17 10:49:12,165 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2022-10-17 10:49:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:12,165 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-10-17 10:49:12,165 INFO L496 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) [2022-10-17 10:49:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-10-17 10:49:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:49:12,167 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:12,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:12,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:12,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:49:12,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1453047458, now seen corresponding path program 5 times [2022-10-17 10:49:12,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:12,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171682808] [2022-10-17 10:49:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:12,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:13,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:13,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171682808] [2022-10-17 10:49:13,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171682808] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:13,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918027765] [2022-10-17 10:49:13,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:49:13,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:13,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:13,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:13,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:49:13,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-10-17 10:49:13,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 10:49:13,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:13,862 INFO L390 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 [2022-10-17 10:49:13,929 INFO L390 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-17 10:49:14,075 INFO L390 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 [2022-10-17 10:49:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:49:14,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:14,312 INFO L390 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 [2022-10-17 10:49:14,316 INFO L390 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 24 treesize of output 20 [2022-10-17 10:49:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:49:14,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918027765] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:14,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:14,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 29 [2022-10-17 10:49:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689164922] [2022-10-17 10:49:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-17 10:49:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-17 10:49:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-10-17 10:49:14,356 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) [2022-10-17 10:49:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:18,362 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2022-10-17 10:49:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-10-17 10:49:18,363 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 [2022-10-17 10:49:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:18,366 INFO L225 Difference]: With dead ends: 289 [2022-10-17 10:49:18,366 INFO L226 Difference]: Without dead ends: 287 [2022-10-17 10:49:18,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1805, Invalid=11077, Unknown=0, NotChecked=0, Total=12882 [2022-10-17 10:49:18,374 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 619 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:18,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 234 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:49:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-10-17 10:49:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 68. [2022-10-17 10:49:18,392 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) [2022-10-17 10:49:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-10-17 10:49:18,393 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 38 [2022-10-17 10:49:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:18,393 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-10-17 10:49:18,394 INFO L496 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) [2022-10-17 10:49:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-10-17 10:49:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:49:18,395 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:18,395 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:49:18,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:18,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:49:18,622 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2022-10-17 10:49:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:18,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867623308] [2022-10-17 10:49:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867623308] [2022-10-17 10:49:19,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867623308] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864282404] [2022-10-17 10:49:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:19,890 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:19,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:49:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 10:49:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:20,166 INFO L390 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-17 10:49:20,328 INFO L390 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 [2022-10-17 10:49:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:49:20,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:20,616 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-17 10:49:20,617 INFO L390 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 [2022-10-17 10:49:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:49:20,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864282404] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:20,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:20,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 10] total 32 [2022-10-17 10:49:20,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775606602] [2022-10-17 10:49:20,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-17 10:49:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-17 10:49:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-10-17 10:49:20,655 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) [2022-10-17 10:49:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:23,245 INFO L93 Difference]: Finished difference Result 233 states and 281 transitions. [2022-10-17 10:49:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-10-17 10:49:23,245 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 [2022-10-17 10:49:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:23,247 INFO L225 Difference]: With dead ends: 233 [2022-10-17 10:49:23,247 INFO L226 Difference]: Without dead ends: 211 [2022-10-17 10:49:23,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=985, Invalid=5495, Unknown=0, NotChecked=0, Total=6480 [2022-10-17 10:49:23,251 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 333 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:23,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 211 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 10:49:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-10-17 10:49:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 60. [2022-10-17 10:49:23,268 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) [2022-10-17 10:49:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-10-17 10:49:23,269 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 38 [2022-10-17 10:49:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:23,269 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-10-17 10:49:23,269 INFO L496 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) [2022-10-17 10:49:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-10-17 10:49:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:49:23,271 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:23,271 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:23,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:23,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:49:23,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash 409588504, now seen corresponding path program 6 times [2022-10-17 10:49:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:23,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078998495] [2022-10-17 10:49:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078998495] [2022-10-17 10:49:24,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078998495] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:24,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735101490] [2022-10-17 10:49:24,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:49:24,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:24,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:24,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:49:24,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-10-17 10:49:24,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:24,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 10:49:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:24,767 INFO L390 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 [2022-10-17 10:49:24,948 INFO L390 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 [2022-10-17 10:49:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:49:24,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:25,151 INFO L390 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 [2022-10-17 10:49:25,155 INFO L390 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 24 treesize of output 20 [2022-10-17 10:49:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:49:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735101490] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:25,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:25,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 30 [2022-10-17 10:49:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84991785] [2022-10-17 10:49:25,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:25,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-17 10:49:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-17 10:49:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-10-17 10:49:25,194 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:27,293 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2022-10-17 10:49:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-10-17 10:49:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 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 [2022-10-17 10:49:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:27,295 INFO L225 Difference]: With dead ends: 205 [2022-10-17 10:49:27,295 INFO L226 Difference]: Without dead ends: 183 [2022-10-17 10:49:27,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=718, Invalid=4832, Unknown=0, NotChecked=0, Total=5550 [2022-10-17 10:49:27,297 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 276 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:27,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 244 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 10:49:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-10-17 10:49:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 77. [2022-10-17 10:49:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.25) internal successors, (95), 76 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) [2022-10-17 10:49:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-10-17 10:49:27,315 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 42 [2022-10-17 10:49:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:27,315 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-10-17 10:49:27,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-10-17 10:49:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:49:27,317 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:27,317 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:49:27,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:27,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:49:27,542 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 1 times [2022-10-17 10:49:27,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:27,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582185895] [2022-10-17 10:49:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:49:29,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582185895] [2022-10-17 10:49:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582185895] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699084322] [2022-10-17 10:49:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:29,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:29,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:29,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:29,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_471df2df-4a69-4738-aa44-c3151c1d980d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:49:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-17 10:49:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:29,911 INFO L390 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 [2022-10-17 10:49:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:49:29,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:30,252 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-17 10:49:30,252 INFO L390 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 [2022-10-17 10:49:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:49:30,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699084322] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:30,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:30,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 11] total 35 [2022-10-17 10:49:30,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228119575] [2022-10-17 10:49:30,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:30,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-17 10:49:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-17 10:49:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-10-17 10:49:30,289 INFO L87 Difference]: Start difference. First operand 77 states and 95 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)