./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:42:57,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:42:57,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:42:57,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:42:57,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:42:57,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:42:57,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:42:57,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:42:57,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:42:57,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:42:57,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:42:57,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:42:57,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:42:57,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:42:57,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:42:57,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:42:57,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:42:57,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:42:57,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:42:57,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:42:57,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:42:57,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:42:57,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:42:57,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:42:57,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:42:57,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:42:57,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:42:57,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:42:57,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:42:57,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:42:57,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:42:57,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:42:57,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:42:57,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:42:57,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:42:57,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:42:57,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:42:57,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:42:57,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:42:57,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:42:57,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:42:57,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:42:57,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:42:57,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:42:57,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:42:57,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:42:57,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:42:57,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:42:57,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:42:57,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:42:57,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:42:57,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:42:57,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:42:57,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:42:57,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:42:57,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:42:57,131 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_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 [2021-12-06 17:42:57,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:42:57,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:42:57,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:42:57,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:42:57,323 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:42:57,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-12-06 17:42:57,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/data/573ea003b/26c2626a6eda4668b9698742a4f539d8/FLAGc4deb177c [2021-12-06 17:42:57,831 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:42:57,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-12-06 17:42:57,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/data/573ea003b/26c2626a6eda4668b9698742a4f539d8/FLAGc4deb177c [2021-12-06 17:42:57,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/data/573ea003b/26c2626a6eda4668b9698742a4f539d8 [2021-12-06 17:42:57,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:42:57,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:42:57,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:42:57,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:42:57,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:42:57,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:42:57" (1/1) ... [2021-12-06 17:42:57,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a58a2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:57, skipping insertion in model container [2021-12-06 17:42:57,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:42:57" (1/1) ... [2021-12-06 17:42:57,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:42:57,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:42:58,109 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_776ca0e4-d4d1-42d1-abe5-b212e224b02e/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-12-06 17:42:58,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:42:58,117 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:42:58,145 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_776ca0e4-d4d1-42d1-abe5-b212e224b02e/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-12-06 17:42:58,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:42:58,166 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:42:58,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58 WrapperNode [2021-12-06 17:42:58,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:42:58,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:42:58,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:42:58,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:42:58,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,200 INFO L137 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2021-12-06 17:42:58,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:42:58,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:42:58,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:42:58,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:42:58,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:42:58,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:42:58,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:42:58,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:42:58,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (1/1) ... [2021-12-06 17:42:58,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:42:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:58,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:42:58,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:42:58,290 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-06 17:42:58,290 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-06 17:42:58,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:42:58,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:42:58,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:42:58,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:42:58,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:42:58,359 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:42:58,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:42:58,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-06 17:42:58,486 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:42:58,490 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:42:58,490 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 17:42:58,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:42:58 BoogieIcfgContainer [2021-12-06 17:42:58,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:42:58,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:42:58,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:42:58,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:42:58,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:42:57" (1/3) ... [2021-12-06 17:42:58,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d6c813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:42:58, skipping insertion in model container [2021-12-06 17:42:58,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:42:58" (2/3) ... [2021-12-06 17:42:58,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d6c813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:42:58, skipping insertion in model container [2021-12-06 17:42:58,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:42:58" (3/3) ... [2021-12-06 17:42:58,497 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2021-12-06 17:42:58,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:42:58,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:42:58,533 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:42:58,538 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:42:58,538 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:42:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 17:42:58,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:58,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:58,554 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1067882842, now seen corresponding path program 1 times [2021-12-06 17:42:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:58,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959855868] [2021-12-06 17:42:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:58,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:58,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959855868] [2021-12-06 17:42:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959855868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:42:58,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:42:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:42:58,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172587983] [2021-12-06 17:42:58,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:42:58,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:42:58,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:42:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:42:58,724 INFO L87 Difference]: Start difference. First operand has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:58,739 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-12-06 17:42:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:42:58,741 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-12-06 17:42:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:58,748 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:42:58,748 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 17:42:58,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:42:58,755 INFO L933 BasicCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:58,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 17:42:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 17:42:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-06 17:42:58,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2021-12-06 17:42:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:58,785 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-06 17:42:58,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-06 17:42:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 17:42:58,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:58,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:58,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:42:58,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash -751387954, now seen corresponding path program 1 times [2021-12-06 17:42:58,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:58,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780647045] [2021-12-06 17:42:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:58,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:58,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780647045] [2021-12-06 17:42:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780647045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:42:58,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:42:58,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:42:58,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128845290] [2021-12-06 17:42:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:42:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:42:58,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:42:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:42:58,846 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:58,861 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-12-06 17:42:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:42:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-12-06 17:42:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:58,863 INFO L225 Difference]: With dead ends: 38 [2021-12-06 17:42:58,863 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 17:42:58,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:42:58,865 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:58,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 17:42:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-06 17:42:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-06 17:42:58,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2021-12-06 17:42:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:58,872 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-06 17:42:58,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-06 17:42:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:42:58,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:58,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:58,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:42:58,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash -799744514, now seen corresponding path program 1 times [2021-12-06 17:42:58,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:58,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464161304] [2021-12-06 17:42:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:58,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:58,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464161304] [2021-12-06 17:42:58,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464161304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:42:58,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:42:58,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:42:58,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592770609] [2021-12-06 17:42:58,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:42:58,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:42:58,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:42:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:42:58,934 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:58,949 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-12-06 17:42:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:42:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2021-12-06 17:42:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:58,950 INFO L225 Difference]: With dead ends: 43 [2021-12-06 17:42:58,950 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 17:42:58,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:42:58,951 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:58,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 17:42:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-06 17:42:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-06 17:42:58,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2021-12-06 17:42:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:58,956 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-06 17:42:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-06 17:42:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:42:58,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:58,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:58,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:42:58,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash -119686144, now seen corresponding path program 1 times [2021-12-06 17:42:58,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:58,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028218751] [2021-12-06 17:42:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:58,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:59,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028218751] [2021-12-06 17:42:59,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028218751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055037904] [2021-12-06 17:42:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:59,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:59,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:59,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:42:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:42:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:59,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055037904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:59,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:59,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-12-06 17:42:59,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663701939] [2021-12-06 17:42:59,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:59,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:42:59,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:42:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:42:59,146 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:59,161 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-12-06 17:42:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:42:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:42:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:59,163 INFO L225 Difference]: With dead ends: 39 [2021-12-06 17:42:59,163 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:42:59,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:42:59,165 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:59,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:42:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 17:42:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 17:42:59,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2021-12-06 17:42:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:59,170 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 17:42:59,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 17:42:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:42:59,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:59,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:59,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:42:59,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:59,373 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash 624479244, now seen corresponding path program 1 times [2021-12-06 17:42:59,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:59,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511306814] [2021-12-06 17:42:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:59,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:42:59,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:59,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511306814] [2021-12-06 17:42:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511306814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:42:59,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:42:59,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:42:59,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837546686] [2021-12-06 17:42:59,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:42:59,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:42:59,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:42:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:42:59,566 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:59,581 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-12-06 17:42:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:42:59,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2021-12-06 17:42:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:59,583 INFO L225 Difference]: With dead ends: 37 [2021-12-06 17:42:59,583 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 17:42:59,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:42:59,584 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:59,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 17:42:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-12-06 17:42:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-06 17:42:59,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-12-06 17:42:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-06 17:42:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-06 17:42:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:42:59,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:59,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:59,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:42:59,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -823741135, now seen corresponding path program 1 times [2021-12-06 17:42:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:59,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427113129] [2021-12-06 17:42:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:59,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:42:59,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:59,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427113129] [2021-12-06 17:42:59,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427113129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:59,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306981326] [2021-12-06 17:42:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:59,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:59,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:59,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:59,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:42:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:42:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:42:59,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:42:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306981326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:59,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:59,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-06 17:42:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127135945] [2021-12-06 17:42:59,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:59,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:42:59,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:42:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:42:59,826 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:59,849 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-12-06 17:42:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:42:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 23 [2021-12-06 17:42:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:59,850 INFO L225 Difference]: With dead ends: 38 [2021-12-06 17:42:59,850 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 17:42:59,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:42:59,852 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:59,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 54 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:42:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 17:42:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 17:42:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-06 17:42:59,858 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2021-12-06 17:42:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:59,858 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-06 17:42:59,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-06 17:42:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:42:59,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:59,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:59,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:43:00,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:00,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:43:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1350466602, now seen corresponding path program 2 times [2021-12-06 17:43:00,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:00,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203649177] [2021-12-06 17:43:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:00,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:43:00,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203649177] [2021-12-06 17:43:00,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203649177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:00,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:00,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:43:00,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591008602] [2021-12-06 17:43:00,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:00,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:00,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:00,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:00,235 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:00,288 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-12-06 17:43:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 27 [2021-12-06 17:43:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:00,290 INFO L225 Difference]: With dead ends: 48 [2021-12-06 17:43:00,290 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 17:43:00,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:43:00,291 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:00,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 17:43:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 17:43:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 17:43:00,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2021-12-06 17:43:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:00,297 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 17:43:00,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 17:43:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:43:00,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:00,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:00,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:43:00,298 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:43:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1124171660, now seen corresponding path program 1 times [2021-12-06 17:43:00,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:00,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363657107] [2021-12-06 17:43:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:00,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:00,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:00,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363657107] [2021-12-06 17:43:00,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363657107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:00,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579554061] [2021-12-06 17:43:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:00,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:00,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:00,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:43:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:43:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:00,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2021-12-06 17:43:00,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:00,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2021-12-06 17:43:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:43:00,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:43:00,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579554061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:00,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:43:00,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-12-06 17:43:00,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387875303] [2021-12-06 17:43:00,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:00,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:00,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:43:00,810 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:00,827 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-06 17:43:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 33 [2021-12-06 17:43:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:00,827 INFO L225 Difference]: With dead ends: 53 [2021-12-06 17:43:00,828 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 17:43:00,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:43:00,828 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:00,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-12-06 17:43:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 17:43:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 17:43:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 17:43:00,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 33 [2021-12-06 17:43:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:00,833 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 17:43:00,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 17:43:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:43:00,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:00,834 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:00,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:43:01,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:01,036 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:43:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 441053932, now seen corresponding path program 1 times [2021-12-06 17:43:01,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175081890] [2021-12-06 17:43:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:01,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:01,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175081890] [2021-12-06 17:43:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175081890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627082405] [2021-12-06 17:43:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:01,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:01,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:01,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:01,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:43:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:43:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:01,810 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-12-06 17:43:01,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2021-12-06 17:43:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:01,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2021-12-06 17:43:01,966 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-12-06 17:43:01,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 34 [2021-12-06 17:43:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2021-12-06 17:43:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:01,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:02,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:02,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 137 [2021-12-06 17:43:02,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 307 treesize of output 280 [2021-12-06 17:43:08,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2021-12-06 17:43:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:08,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627082405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:08,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:08,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2021-12-06 17:43:08,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656133724] [2021-12-06 17:43:08,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:08,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 17:43:08,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 17:43:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:43:08,972 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:09,876 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-12-06 17:43:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:43:09,877 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 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 37 [2021-12-06 17:43:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:09,877 INFO L225 Difference]: With dead ends: 60 [2021-12-06 17:43:09,877 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 17:43:09,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:43:09,879 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 337 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:09,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 109 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 206 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2021-12-06 17:43:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 17:43:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-06 17:43:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-12-06 17:43:09,883 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2021-12-06 17:43:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:09,883 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-12-06 17:43:09,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-12-06 17:43:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 17:43:09,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:09,884 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:09,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:10,086 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:43:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1086283439, now seen corresponding path program 2 times [2021-12-06 17:43:10,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:10,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613104639] [2021-12-06 17:43:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:10,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:43:10,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613104639] [2021-12-06 17:43:10,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613104639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209534803] [2021-12-06 17:43:10,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:10,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:10,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:10,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ca0e4-d4d1-42d1-abe5-b212e224b02e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:43:10,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 17:43:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:10,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:43:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:10,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-06 17:43:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:43:10,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:10,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:43:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:10,979 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 17:43:10,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:43:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:11,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 16 treesize of output 21 [2021-12-06 17:43:11,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:43:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:11,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 21 [2021-12-06 17:43:11,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 17:43:11,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:11,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:11,147 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:43:11,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 86 [2021-12-06 17:43:11,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:11,157 INFO L354 Elim1Store]: treesize reduction 58, result has 18.3 percent of original size [2021-12-06 17:43:11,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 65 [2021-12-06 17:43:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:43:11,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:12,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:12,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:12,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 624 treesize of output 480 [2021-12-06 17:43:12,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:12,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:12,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 484 treesize of output 340 [2021-12-06 17:43:12,276 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse9 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse5 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)))) (.cse2 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse7 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_dll_create_~head~0#1.base| (select v_arrayElimArr_3 .cse0))) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_4 .cse0))) (not (= .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (let ((.cse6 (+ .cse7 4))) (let ((.cse3 (select (select .cse2 .cse1) .cse6)) (.cse4 (+ (select (select .cse5 .cse1) .cse6) 4))) (and (= (select (select .cse2 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0)))) (not (= .cse7 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))))))) is different from false [2021-12-06 17:43:12,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|v_ULTIMATE.start_dll_create_~new_head~0#1.base_16| Int)) (let ((.cse7 (select v_arrayElimArr_4 4))) (let ((.cse9 (+ .cse7 8))) (let ((.cse0 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_16| v_arrayElimArr_4))) (store .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse9 0)))) (.cse3 (let ((.cse8 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_16| v_arrayElimArr_3))) (store .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse9 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_16|))))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_16|) 0)) (let ((.cse5 (+ .cse6 4))) (let ((.cse1 (select (select .cse3 .cse4) .cse5)) (.cse2 (+ (select (select .cse0 .cse4) .cse5) 4))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= (select (select .cse3 .cse1) .cse2) 0)))) (not (= |v_ULTIMATE.start_dll_create_~new_head~0#1.base_16| .cse4)) (not (= .cse6 0)) (= |v_ULTIMATE.start_dll_create_~new_head~0#1.base_16| 0) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select v_arrayElimArr_3 4))) (not (= .cse7 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)))))))) is different from false [2021-12-06 17:43:13,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:13,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:13,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 804 treesize of output 584 [2021-12-06 17:43:13,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:13,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:13,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 594 treesize of output 374 [2021-12-06 17:43:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:14,328 INFO L354 Elim1Store]: treesize reduction 686, result has 47.2 percent of original size [2021-12-06 17:43:14,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 77 case distinctions, treesize of input 80648 treesize of output 72276 [2021-12-06 17:43:16,091 INFO L244 Elim1Store]: Index analysis took 125 ms [2021-12-06 17:44:06,172 WARN L227 SmtUtils]: Spent 50.03s on a formula simplification. DAG size of input: 2335 DAG size of output: 919 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 17:44:06,175 INFO L354 Elim1Store]: treesize reduction 7169, result has 31.9 percent of original size [2021-12-06 17:44:06,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 0 disjoint index pairs (out of 561 index pairs), introduced 48 new quantified variables, introduced 561 case distinctions, treesize of input 4621760 treesize of output 4102673 [2021-12-06 17:44:21,113 WARN L227 SmtUtils]: Spent 14.91s on a formula simplification that was a NOOP. DAG size: 10163 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 17:44:35,522 WARN L227 SmtUtils]: Spent 14.31s on a formula simplification that was a NOOP. DAG size: 10069 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 17:45:24,686 WARN L227 SmtUtils]: Spent 47.48s on a formula simplification. DAG size of input: 1583 DAG size of output: 823 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 17:45:24,688 INFO L354 Elim1Store]: treesize reduction 2390, result has 46.0 percent of original size [2021-12-06 17:45:24,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 28 select indices, 28 select index equivalence classes, 0 disjoint index pairs (out of 378 index pairs), introduced 45 new quantified variables, introduced 378 case distinctions, treesize of input 7033298 treesize of output 5175629 [2021-12-06 17:50:58,146 WARN L227 SmtUtils]: Spent 5.56m on a formula simplification. DAG size of input: 11635 DAG size of output: 11593 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 17:51:26,878 WARN L227 SmtUtils]: Spent 28.50s on a formula simplification that was a NOOP. DAG size: 11534 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 17:51:30,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:51:45,499 INFO L244 Elim1Store]: Index analysis took 14518 ms [2021-12-06 17:53:10,064 WARN L227 SmtUtils]: Spent 1.41m on a formula simplification. DAG size of input: 1601 DAG size of output: 861 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 17:53:10,067 INFO L354 Elim1Store]: treesize reduction 4043, result has 47.1 percent of original size [2021-12-06 17:53:10,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 28 select indices, 28 select index equivalence classes, 0 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 378 case distinctions, treesize of input 5209433 treesize of output 4855472