./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/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_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:45:47,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:45:47,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:45:47,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:45:47,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:45:47,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:45:47,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:45:47,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:45:47,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:45:47,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:45:47,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:45:47,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:45:47,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:45:47,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:45:47,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:45:47,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:45:47,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:45:47,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:45:47,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:45:47,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:45:47,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:45:47,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:45:47,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:45:47,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:45:47,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:45:47,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:45:47,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:45:47,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:45:47,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:45:47,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:45:47,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:45:47,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:45:47,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:45:47,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:45:47,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:45:47,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:45:47,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:45:47,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:45:47,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:45:47,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:45:47,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:45:47,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:45:47,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:45:47,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:45:47,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:45:47,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:45:47,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:45:47,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:45:47,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:45:47,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:45:47,218 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:45:47,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:45:47,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:45:47,218 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:45:47,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:45:47,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:45:47,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:45:47,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:45:47,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:45:47,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:45:47,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:45:47,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:45:47,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:45:47,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:45:47,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:45:47,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:45:47,221 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_6f92c339-87a3-479d-bb20-e4fbee16c795/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2021-12-06 18:45:47,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:45:47,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:45:47,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:45:47,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:45:47,414 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:45:47,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2021-12-06 18:45:47,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/44b628f9c/9e973bb8696b4d58af3d0aaf548048e6/FLAG34b98e122 [2021-12-06 18:45:47,931 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:45:47,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2021-12-06 18:45:47,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/44b628f9c/9e973bb8696b4d58af3d0aaf548048e6/FLAG34b98e122 [2021-12-06 18:45:47,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/44b628f9c/9e973bb8696b4d58af3d0aaf548048e6 [2021-12-06 18:45:47,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:45:47,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:45:47,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:45:47,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:45:47,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:45:47,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:45:47" (1/1) ... [2021-12-06 18:45:47,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5c03bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:47, skipping insertion in model container [2021-12-06 18:45:47,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:45:47" (1/1) ... [2021-12-06 18:45:47,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:45:47,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:45:48,204 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_6f92c339-87a3-479d-bb20-e4fbee16c795/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2021-12-06 18:45:48,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:45:48,211 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:45:48,243 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_6f92c339-87a3-479d-bb20-e4fbee16c795/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2021-12-06 18:45:48,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:45:48,265 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:45:48,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48 WrapperNode [2021-12-06 18:45:48,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:45:48,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:45:48,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:45:48,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:45:48,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,302 INFO L137 Inliner]: procedures = 127, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 160 [2021-12-06 18:45:48,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:45:48,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:45:48,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:45:48,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:45:48,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:45:48,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:45:48,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:45:48,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:45:48,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (1/1) ... [2021-12-06 18:45:48,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:45:48,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:48,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:45:48,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 18:45:48,384 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:45:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:45:48,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:45:48,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:45:48,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:45:48,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:45:48,468 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:45:48,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:45:48,764 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:45:48,770 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:45:48,770 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:45:48,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:45:48 BoogieIcfgContainer [2021-12-06 18:45:48,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:45:48,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:45:48,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:45:48,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:45:48,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:45:47" (1/3) ... [2021-12-06 18:45:48,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d53558d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:45:48, skipping insertion in model container [2021-12-06 18:45:48,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:48" (2/3) ... [2021-12-06 18:45:48,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d53558d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:45:48, skipping insertion in model container [2021-12-06 18:45:48,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:45:48" (3/3) ... [2021-12-06 18:45:48,778 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2021-12-06 18:45:48,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:45:48,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-12-06 18:45:48,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:45:48,821 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:45:48,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-12-06 18:45:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:45:48,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:48,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:45:48,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash 896534515, now seen corresponding path program 1 times [2021-12-06 18:45:48,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:48,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242110675] [2021-12-06 18:45:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:48,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:48,998 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 18:45:48,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242110675] [2021-12-06 18:45:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242110675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:49,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:49,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:45:49,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439463595] [2021-12-06 18:45:49,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:49,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:49,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:49,027 INFO L87 Difference]: Start difference. First operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:45:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:49,135 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2021-12-06 18:45:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:45:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:49,143 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:45:49,143 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 18:45:49,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:49,147 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:49,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 240 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:45:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 18:45:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-06 18:45:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 75 states have (on average 2.026666666666667) internal successors, (152), 143 states have internal predecessors, (152), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2021-12-06 18:45:49,180 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 6 [2021-12-06 18:45:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:49,180 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2021-12-06 18:45:49,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:45:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2021-12-06 18:45:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:45:49,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:49,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:45:49,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:45:49,181 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 896534514, now seen corresponding path program 1 times [2021-12-06 18:45:49,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:49,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607741368] [2021-12-06 18:45:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:49,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,211 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 18:45:49,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607741368] [2021-12-06 18:45:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607741368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:49,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:49,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:45:49,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119949245] [2021-12-06 18:45:49,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:49,214 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:45:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:49,302 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2021-12-06 18:45:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:45:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:49,304 INFO L225 Difference]: With dead ends: 145 [2021-12-06 18:45:49,304 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 18:45:49,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:49,306 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:49,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:45:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 18:45:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-06 18:45:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-12-06 18:45:49,319 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 6 [2021-12-06 18:45:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:49,320 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-12-06 18:45:49,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:45:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-12-06 18:45:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:45:49,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:49,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:49,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:45:49,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 976905444, now seen corresponding path program 1 times [2021-12-06 18:45:49,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745208972] [2021-12-06 18:45:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:49,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,408 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 18:45:49,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745208972] [2021-12-06 18:45:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745208972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:49,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:49,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:45:49,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702916893] [2021-12-06 18:45:49,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:49,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:45:49,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:45:49,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:45:49,411 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:45:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:49,503 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-12-06 18:45:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:45:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 18:45:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:49,505 INFO L225 Difference]: With dead ends: 156 [2021-12-06 18:45:49,505 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 18:45:49,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:45:49,507 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:49,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 352 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:45:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 18:45:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-12-06 18:45:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 141 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2021-12-06 18:45:49,520 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 14 [2021-12-06 18:45:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:49,521 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2021-12-06 18:45:49,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:45:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2021-12-06 18:45:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:45:49,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:49,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:45:49,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 302098592, now seen corresponding path program 1 times [2021-12-06 18:45:49,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200172497] [2021-12-06 18:45:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:49,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:45:49,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:49,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200172497] [2021-12-06 18:45:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200172497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:49,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:49,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:49,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700779785] [2021-12-06 18:45:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:49,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:45:49,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:45:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:45:49,625 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:49,810 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-12-06 18:45:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:45:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 18:45:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:49,813 INFO L225 Difference]: With dead ends: 146 [2021-12-06 18:45:49,813 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 18:45:49,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:49,814 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 21 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:49,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 484 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:45:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 18:45:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-06 18:45:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-12-06 18:45:49,821 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 24 [2021-12-06 18:45:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:49,822 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-12-06 18:45:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-12-06 18:45:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:45:49,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:49,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:49,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:45:49,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:49,823 INFO L85 PathProgramCache]: Analyzing trace with hash 302098593, now seen corresponding path program 1 times [2021-12-06 18:45:49,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:49,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810853526] [2021-12-06 18:45:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:49,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:49,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:49,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810853526] [2021-12-06 18:45:49,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810853526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:49,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:49,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:49,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009085108] [2021-12-06 18:45:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:49,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:45:49,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:45:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:45:49,946 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:50,140 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-12-06 18:45:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:45:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 18:45:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:50,142 INFO L225 Difference]: With dead ends: 145 [2021-12-06 18:45:50,142 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 18:45:50,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:50,144 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 19 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:50,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 508 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:45:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 18:45:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-12-06 18:45:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 139 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2021-12-06 18:45:50,153 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 24 [2021-12-06 18:45:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:50,153 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2021-12-06 18:45:50,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2021-12-06 18:45:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:45:50,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:50,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:50,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:45:50,155 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029503, now seen corresponding path program 1 times [2021-12-06 18:45:50,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:50,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437431628] [2021-12-06 18:45:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:50,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:50,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:50,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437431628] [2021-12-06 18:45:50,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437431628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069633187] [2021-12-06 18:45:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:50,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:50,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:50,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:45:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:45:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:45:50,552 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:45:50,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 18:45:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:50,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:50,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069633187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:50,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:45:50,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-06 18:45:50,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563855159] [2021-12-06 18:45:50,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:50,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:45:50,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:45:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:45:50,628 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:50,899 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2021-12-06 18:45:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:45:50,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 18:45:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:50,900 INFO L225 Difference]: With dead ends: 169 [2021-12-06 18:45:50,900 INFO L226 Difference]: Without dead ends: 169 [2021-12-06 18:45:50,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:45:50,901 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 128 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:50,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 457 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 492 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2021-12-06 18:45:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-06 18:45:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2021-12-06 18:45:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.925) internal successors, (154), 143 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-12-06 18:45:50,910 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 26 [2021-12-06 18:45:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:50,911 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-12-06 18:45:50,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-12-06 18:45:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:45:50,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:50,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:50,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:45:51,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:51,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029502, now seen corresponding path program 1 times [2021-12-06 18:45:51,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:51,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100087218] [2021-12-06 18:45:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:51,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:51,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:51,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:51,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:51,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100087218] [2021-12-06 18:45:51,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100087218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587692013] [2021-12-06 18:45:51,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:51,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:51,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:51,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:51,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:45:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 18:45:51,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:51,399 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 18:45:51,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:51,618 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 14 treesize of output 16 [2021-12-06 18:45:51,625 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:45:51,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:45:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:51,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:51,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587692013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:51,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:45:51,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-12-06 18:45:51,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559398475] [2021-12-06 18:45:51,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:51,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:45:51,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:45:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:45:51,732 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:45:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:52,201 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2021-12-06 18:45:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:45:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-06 18:45:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:52,202 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:45:52,202 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 18:45:52,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:45:52,204 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 18 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:52,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 944 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1048 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2021-12-06 18:45:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 18:45:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-12-06 18:45:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.9125) internal successors, (153), 143 states have internal predecessors, (153), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2021-12-06 18:45:52,210 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 26 [2021-12-06 18:45:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:52,210 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2021-12-06 18:45:52,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:45:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2021-12-06 18:45:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:45:52,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:52,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:52,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:45:52,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 18:45:52,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1908047191, now seen corresponding path program 1 times [2021-12-06 18:45:52,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:52,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29676637] [2021-12-06 18:45:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:52,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:52,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:52,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:52,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:52,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29676637] [2021-12-06 18:45:52,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29676637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:52,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360844037] [2021-12-06 18:45:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:52,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:52,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:52,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:52,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:45:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:52,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:45:52,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360844037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:52,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:52,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-06 18:45:52,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403618259] [2021-12-06 18:45:52,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:45:52,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:45:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:45:52,620 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:45:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:52,719 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2021-12-06 18:45:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:45:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 18:45:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:52,721 INFO L225 Difference]: With dead ends: 150 [2021-12-06 18:45:52,721 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 18:45:52,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:52,722 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 4 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:52,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 754 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:45:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 18:45:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-12-06 18:45:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.9) internal successors, (152), 143 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2021-12-06 18:45:52,727 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 28 [2021-12-06 18:45:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:52,727 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2021-12-06 18:45:52,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:45:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2021-12-06 18:45:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:45:52,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:52,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:52,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:45:52,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:52,930 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -984859886, now seen corresponding path program 1 times [2021-12-06 18:45:52,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594770017] [2021-12-06 18:45:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:52,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:45:53,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:53,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594770017] [2021-12-06 18:45:53,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594770017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:53,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318160212] [2021-12-06 18:45:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:53,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:53,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:45:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:45:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:45:53,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:53,229 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:45:53,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 18:45:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:45:53,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318160212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:53,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:53,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-12-06 18:45:53,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311077951] [2021-12-06 18:45:53,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:53,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:53,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:53,256 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:53,381 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2021-12-06 18:45:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:45:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-06 18:45:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:53,383 INFO L225 Difference]: With dead ends: 154 [2021-12-06 18:45:53,383 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 18:45:53,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:53,383 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 13 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:53,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 351 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:45:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 18:45:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-12-06 18:45:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.891566265060241) internal successors, (157), 146 states have internal predecessors, (157), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2021-12-06 18:45:53,389 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 29 [2021-12-06 18:45:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2021-12-06 18:45:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2021-12-06 18:45:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:45:53,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:53,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:53,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:45:53,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:53,593 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash -984859885, now seen corresponding path program 1 times [2021-12-06 18:45:53,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:53,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325097271] [2021-12-06 18:45:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:53,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:53,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:53,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325097271] [2021-12-06 18:45:53,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325097271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:53,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579250923] [2021-12-06 18:45:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:53,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:53,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:53,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:45:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:45:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:53,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:45:53,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 18:45:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:54,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579250923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:54,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:54,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-12-06 18:45:54,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853840632] [2021-12-06 18:45:54,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:54,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:45:54,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:45:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:45:54,020 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 18:45:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:54,226 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2021-12-06 18:45:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:45:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-12-06 18:45:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:54,228 INFO L225 Difference]: With dead ends: 159 [2021-12-06 18:45:54,228 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 18:45:54,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:45:54,229 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 22 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:54,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1434 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:45:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 18:45:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-12-06 18:45:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.8795180722891567) internal successors, (156), 146 states have internal predecessors, (156), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2021-12-06 18:45:54,235 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 29 [2021-12-06 18:45:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:54,235 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2021-12-06 18:45:54,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 18:45:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2021-12-06 18:45:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:45:54,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:54,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:54,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:45:54,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:45:54,438 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:54,439 INFO L85 PathProgramCache]: Analyzing trace with hash -465885389, now seen corresponding path program 1 times [2021-12-06 18:45:54,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:54,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896459126] [2021-12-06 18:45:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:54,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:54,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:45:54,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:54,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896459126] [2021-12-06 18:45:54,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896459126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:54,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:54,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:45:54,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085715043] [2021-12-06 18:45:54,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:45:54,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:45:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:54,559 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:54,745 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-12-06 18:45:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:45:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 18:45:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:54,747 INFO L225 Difference]: With dead ends: 152 [2021-12-06 18:45:54,747 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 18:45:54,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:45:54,748 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 23 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:54,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 542 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:45:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 18:45:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-12-06 18:45:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 83 states have (on average 1.8674698795180722) internal successors, (155), 145 states have internal predecessors, (155), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2021-12-06 18:45:54,753 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 30 [2021-12-06 18:45:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:54,754 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2021-12-06 18:45:54,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2021-12-06 18:45:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:45:54,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:54,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:54,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:45:54,755 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash -465885388, now seen corresponding path program 1 times [2021-12-06 18:45:54,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:54,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316156044] [2021-12-06 18:45:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:54,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:54,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:54,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:54,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:54,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316156044] [2021-12-06 18:45:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316156044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:54,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:54,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:45:54,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074803050] [2021-12-06 18:45:54,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:45:54,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:45:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:54,849 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:55,058 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2021-12-06 18:45:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:45:55,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 18:45:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:55,060 INFO L225 Difference]: With dead ends: 150 [2021-12-06 18:45:55,060 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 18:45:55,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:45:55,061 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 20 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:55,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 572 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:45:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 18:45:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-06 18:45:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 83 states have (on average 1.855421686746988) internal successors, (154), 144 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:45:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2021-12-06 18:45:55,064 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 30 [2021-12-06 18:45:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:55,064 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2021-12-06 18:45:55,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:45:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2021-12-06 18:45:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:45:55,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:55,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:55,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:45:55,065 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1959133359, now seen corresponding path program 1 times [2021-12-06 18:45:55,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:55,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605707142] [2021-12-06 18:45:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:55,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:45:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:45:55,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605707142] [2021-12-06 18:45:55,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605707142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203037618] [2021-12-06 18:45:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:55,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:55,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:55,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:55,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:45:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:45:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:45:55,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:45:55,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203037618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:55,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:45:55,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-06 18:45:55,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257677339] [2021-12-06 18:45:55,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:55,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:45:55,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:45:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:55,253 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:55,261 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2021-12-06 18:45:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:45:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-06 18:45:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:55,262 INFO L225 Difference]: With dead ends: 138 [2021-12-06 18:45:55,262 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 18:45:55,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:55,263 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 170 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 18:45:55,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 170 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 18:45:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-12-06 18:45:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 133 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:45:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2021-12-06 18:45:55,266 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 41 [2021-12-06 18:45:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:55,267 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2021-12-06 18:45:55,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2021-12-06 18:45:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:45:55,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:55,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:55,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:45:55,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:45:55,468 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:45:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash -930567857, now seen corresponding path program 1 times [2021-12-06 18:45:55,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:55,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533502530] [2021-12-06 18:45:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:55,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:45:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:45:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:45:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:45:55,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533502530] [2021-12-06 18:45:55,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533502530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505925145] [2021-12-06 18:45:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:55,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:55,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:55,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:55,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:45:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:45:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:55,754 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 18:45:55,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:45:55,813 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:45:55,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:45:55,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:45:55,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 110745 column 46: unknown constant v_#valid_BEFORE_CALL_8 [2021-12-06 18:45:55,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:45:55,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-06 18:45:55,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854566948] [2021-12-06 18:45:55,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:55,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:45:55,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:45:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:45:55,980 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:45:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:45:55,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:45:55,982 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 18:45:55,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:56,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:45:56,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 18:45:56,184 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@78d53c3f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 18:45:56,191 INFO L158 Benchmark]: Toolchain (without parser) took 8231.87ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 88.5MB in the beginning and 94.6MB in the end (delta: -6.1MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. [2021-12-06 18:45:56,192 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 132.1MB. Free memory was 107.4MB in the beginning and 107.3MB in the end (delta: 140.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:45:56,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.70ms. Allocated memory is still 132.1MB. Free memory was 88.4MB in the beginning and 101.0MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 18:45:56,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.50ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:45:56,196 INFO L158 Benchmark]: Boogie Preprocessor took 26.73ms. Allocated memory is still 132.1MB. Free memory was 98.9MB in the beginning and 96.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:45:56,197 INFO L158 Benchmark]: RCFGBuilder took 441.57ms. Allocated memory is still 132.1MB. Free memory was 96.8MB in the beginning and 73.7MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-06 18:45:56,198 INFO L158 Benchmark]: TraceAbstraction took 7416.83ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 73.1MB in the beginning and 94.6MB in the end (delta: -21.6MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-06 18:45:56,203 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 132.1MB. Free memory was 107.4MB in the beginning and 107.3MB in the end (delta: 140.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.70ms. Allocated memory is still 132.1MB. Free memory was 88.4MB in the beginning and 101.0MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.50ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.73ms. Allocated memory is still 132.1MB. Free memory was 98.9MB in the beginning and 96.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 441.57ms. Allocated memory is still 132.1MB. Free memory was 96.8MB in the beginning and 73.7MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 7416.83ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 73.1MB in the beginning and 94.6MB in the end (delta: -21.6MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@78d53c3f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@78d53c3f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 18:45:56,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/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_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:45:57,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:45:57,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:45:57,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:45:57,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:45:57,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:45:57,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:45:57,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:45:57,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:45:57,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:45:57,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:45:57,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:45:57,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:45:57,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:45:57,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:45:57,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:45:57,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:45:57,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:45:57,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:45:57,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:45:57,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:45:57,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:45:57,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:45:57,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:45:57,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:45:57,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:45:57,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:45:57,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:45:57,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:45:57,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:45:57,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:45:57,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:45:57,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:45:57,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:45:57,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:45:57,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:45:57,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:45:57,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:45:57,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:45:57,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:45:57,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:45:57,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 18:45:57,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:45:57,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:45:57,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:45:57,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:45:57,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:45:57,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:45:57,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:45:57,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:45:57,995 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:45:57,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:45:57,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:45:57,995 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:45:57,996 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 18:45:57,997 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 18:45:57,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:45:57,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:45:57,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:45:57,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:45:57,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:45:57,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:45:57,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:45:57,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:45:57,998 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 18:45:57,998 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 18:45:57,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:45:57,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 18:45:57,998 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2021-12-06 18:45:58,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:45:58,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:45:58,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:45:58,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:45:58,233 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:45:58,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2021-12-06 18:45:58,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/7d14a9b6f/ff3d488dc7da4022b735d05652bc7590/FLAG3f5594410 [2021-12-06 18:45:58,748 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:45:58,748 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2021-12-06 18:45:58,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/7d14a9b6f/ff3d488dc7da4022b735d05652bc7590/FLAG3f5594410 [2021-12-06 18:45:59,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/data/7d14a9b6f/ff3d488dc7da4022b735d05652bc7590 [2021-12-06 18:45:59,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:45:59,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:45:59,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:45:59,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:45:59,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:45:59,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438a91fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59, skipping insertion in model container [2021-12-06 18:45:59,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:45:59,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:45:59,477 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_6f92c339-87a3-479d-bb20-e4fbee16c795/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2021-12-06 18:45:59,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:45:59,488 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:45:59,522 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_6f92c339-87a3-479d-bb20-e4fbee16c795/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2021-12-06 18:45:59,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:45:59,547 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:45:59,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59 WrapperNode [2021-12-06 18:45:59,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:45:59,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:45:59,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:45:59,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:45:59,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,588 INFO L137 Inliner]: procedures = 130, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 161 [2021-12-06 18:45:59,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:45:59,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:45:59,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:45:59,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:45:59,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:45:59,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:45:59,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:45:59,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:45:59,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (1/1) ... [2021-12-06 18:45:59,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:45:59,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:59,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:45:59,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:45:59,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 18:45:59,669 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 18:45:59,669 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 18:45:59,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:45:59,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:45:59,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:45:59,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:45:59,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:45:59,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:45:59,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:45:59,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:45:59,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:45:59,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:45:59,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:45:59,768 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:45:59,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:46:00,323 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:46:00,331 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:46:00,331 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:46:00,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:46:00 BoogieIcfgContainer [2021-12-06 18:46:00,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:46:00,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:46:00,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:46:00,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:46:00,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:45:59" (1/3) ... [2021-12-06 18:46:00,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e09a474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:46:00, skipping insertion in model container [2021-12-06 18:46:00,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:59" (2/3) ... [2021-12-06 18:46:00,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e09a474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:46:00, skipping insertion in model container [2021-12-06 18:46:00,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:46:00" (3/3) ... [2021-12-06 18:46:00,341 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2021-12-06 18:46:00,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:46:00,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-12-06 18:46:00,380 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:46:00,385 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:46:00,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-12-06 18:46:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:46:00,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:00,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:46:00,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash 896534515, now seen corresponding path program 1 times [2021-12-06 18:46:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262305556] [2021-12-06 18:46:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:00,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:00,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:00,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:00,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:46:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:46:00,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:00,569 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 18:46:00,597 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 18:46:00,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:00,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262305556] [2021-12-06 18:46:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262305556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:00,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:00,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:46:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110759174] [2021-12-06 18:46:00,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:00,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:46:00,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:46:00,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:46:00,633 INFO L87 Difference]: Start difference. First operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:46:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:00,962 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2021-12-06 18:46:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:46:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:46:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:00,971 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:46:00,971 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 18:46:00,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 18:46:00,974 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:00,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 240 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:46:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 18:46:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-06 18:46:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 75 states have (on average 2.026666666666667) internal successors, (152), 143 states have internal predecessors, (152), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2021-12-06 18:46:01,007 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 6 [2021-12-06 18:46:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2021-12-06 18:46:01,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:46:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2021-12-06 18:46:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:46:01,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:01,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:46:01,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:01,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:01,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:01,213 INFO L85 PathProgramCache]: Analyzing trace with hash 896534514, now seen corresponding path program 1 times [2021-12-06 18:46:01,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:01,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919126104] [2021-12-06 18:46:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:01,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:01,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:01,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:46:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:46:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:01,404 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 18:46:01,413 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 18:46:01,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:01,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919126104] [2021-12-06 18:46:01,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919126104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:01,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:01,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:46:01,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742513179] [2021-12-06 18:46:01,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:01,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:46:01,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:46:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:46:01,417 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:46:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:01,607 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2021-12-06 18:46:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:46:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:46:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:01,610 INFO L225 Difference]: With dead ends: 145 [2021-12-06 18:46:01,610 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 18:46:01,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 18:46:01,612 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:01,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:46:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 18:46:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-06 18:46:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-12-06 18:46:01,622 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 6 [2021-12-06 18:46:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:01,622 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-12-06 18:46:01,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 18:46:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-12-06 18:46:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:46:01,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:01,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:01,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:01,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:01,825 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash 976905444, now seen corresponding path program 1 times [2021-12-06 18:46:01,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:01,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235102413] [2021-12-06 18:46:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:01,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:01,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:01,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:46:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:01,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:46:01,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:01,955 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 18:46:01,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:01,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:01,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235102413] [2021-12-06 18:46:01,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235102413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:01,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:01,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:46:01,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334591223] [2021-12-06 18:46:01,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:01,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:46:01,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:46:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:46:01,957 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:46:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:01,966 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-12-06 18:46:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:46:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 18:46:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:01,968 INFO L225 Difference]: With dead ends: 156 [2021-12-06 18:46:01,968 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 18:46:01,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 18:46:01,969 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 303 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 18:46:01,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 303 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:46:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 18:46:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-12-06 18:46:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 141 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2021-12-06 18:46:01,978 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 14 [2021-12-06 18:46:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:01,978 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2021-12-06 18:46:01,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:46:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2021-12-06 18:46:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:46:01,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:01,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:01,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:46:02,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:02,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:02,181 INFO L85 PathProgramCache]: Analyzing trace with hash 302098592, now seen corresponding path program 1 times [2021-12-06 18:46:02,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284720600] [2021-12-06 18:46:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:02,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:02,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:02,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:46:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:46:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:02,293 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 18:46:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:02,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:02,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284720600] [2021-12-06 18:46:02,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284720600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:02,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:02,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:46:02,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395673477] [2021-12-06 18:46:02,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:02,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:46:02,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:46:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:02,333 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:02,839 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-12-06 18:46:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:46:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 18:46:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:02,841 INFO L225 Difference]: With dead ends: 146 [2021-12-06 18:46:02,841 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 18:46:02,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:02,842 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:02,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 439 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:46:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 18:46:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-06 18:46:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-12-06 18:46:02,849 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 24 [2021-12-06 18:46:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:02,849 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-12-06 18:46:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-12-06 18:46:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:46:02,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:02,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:02,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 18:46:03,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:03,052 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash 302098593, now seen corresponding path program 1 times [2021-12-06 18:46:03,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:03,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222630304] [2021-12-06 18:46:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:03,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:03,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:03,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:46:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:46:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:03,171 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 18:46:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:03,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:03,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:03,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222630304] [2021-12-06 18:46:03,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222630304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:03,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:03,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:46:03,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795109811] [2021-12-06 18:46:03,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:03,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:46:03,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:46:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:03,255 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:03,852 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-12-06 18:46:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:46:03,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-06 18:46:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:03,854 INFO L225 Difference]: With dead ends: 145 [2021-12-06 18:46:03,854 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 18:46:03,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:03,855 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:03,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 463 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:46:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 18:46:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-12-06 18:46:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 139 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2021-12-06 18:46:03,861 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 24 [2021-12-06 18:46:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:03,861 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2021-12-06 18:46:03,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2021-12-06 18:46:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:46:03,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:03,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:03,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 18:46:04,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:04,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029503, now seen corresponding path program 1 times [2021-12-06 18:46:04,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:04,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235219737] [2021-12-06 18:46:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:04,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:04,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:04,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:46:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:46:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:04,176 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 18:46:04,340 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:46:04,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:46:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:04,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:04,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:04,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235219737] [2021-12-06 18:46:04,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235219737] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:04,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:04,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-06 18:46:04,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056238461] [2021-12-06 18:46:04,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:04,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:46:04,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:46:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:46:04,599 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:46:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:05,166 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-12-06 18:46:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:46:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 18:46:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:05,168 INFO L225 Difference]: With dead ends: 159 [2021-12-06 18:46:05,168 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 18:46:05,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:46:05,170 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 7 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:05,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 499 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 327 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2021-12-06 18:46:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 18:46:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-12-06 18:46:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.8505747126436782) internal successors, (161), 150 states have internal predecessors, (161), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2021-12-06 18:46:05,177 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 26 [2021-12-06 18:46:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:05,178 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2021-12-06 18:46:05,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:46:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2021-12-06 18:46:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:46:05,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:05,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:05,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 18:46:05,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:05,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029502, now seen corresponding path program 1 times [2021-12-06 18:46:05,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:05,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731690301] [2021-12-06 18:46:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:05,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:05,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:05,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:05,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 18:46:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:46:05,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:05,553 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 18:46:05,559 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 18:46:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:05,754 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 18:46:05,762 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:46:05,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:46:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:05,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:06,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731690301] [2021-12-06 18:46:06,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731690301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2089278653] [2021-12-06 18:46:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:06,023 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:46:06,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:46:06,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-06 18:46:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:46:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:06,201 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 18:46:06,206 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 18:46:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:06,369 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 18:46:06,375 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:46:06,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:46:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:06,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2089278653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:06,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:06,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 18:46:06,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987938747] [2021-12-06 18:46:06,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:46:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:46:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:46:06,564 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:46:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:07,352 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-12-06 18:46:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:46:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-06 18:46:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:07,354 INFO L225 Difference]: With dead ends: 159 [2021-12-06 18:46:07,354 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 18:46:07,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:46:07,355 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:07,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 489 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2021-12-06 18:46:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 18:46:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-12-06 18:46:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.839080459770115) internal successors, (160), 150 states have internal predecessors, (160), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2021-12-06 18:46:07,359 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 26 [2021-12-06 18:46:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:07,360 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2021-12-06 18:46:07,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:46:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2021-12-06 18:46:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:46:07,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:07,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:07,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 18:46:07,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-12-06 18:46:07,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:07,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1908047191, now seen corresponding path program 1 times [2021-12-06 18:46:07,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:07,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474048258] [2021-12-06 18:46:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:07,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:07,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 18:46:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:46:07,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:07,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:07,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474048258] [2021-12-06 18:46:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474048258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:07,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:07,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 18:46:07,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023845641] [2021-12-06 18:46:07,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:46:07,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:46:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:07,959 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:46:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:08,079 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2021-12-06 18:46:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:46:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 18:46:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:08,081 INFO L225 Difference]: With dead ends: 158 [2021-12-06 18:46:08,081 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 18:46:08,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:08,082 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 4 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:08,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 709 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:46:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 18:46:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-12-06 18:46:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.8275862068965518) internal successors, (159), 150 states have internal predecessors, (159), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 167 transitions. [2021-12-06 18:46:08,086 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 167 transitions. Word has length 28 [2021-12-06 18:46:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 167 transitions. [2021-12-06 18:46:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:46:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 167 transitions. [2021-12-06 18:46:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:46:08,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:08,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:08,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 18:46:08,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:08,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash -984859886, now seen corresponding path program 1 times [2021-12-06 18:46:08,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:08,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863742789] [2021-12-06 18:46:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:08,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:08,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 18:46:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:46:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:46:08,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:08,436 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:46:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:46:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:46:08,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863742789] [2021-12-06 18:46:08,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863742789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:08,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:08,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-06 18:46:08,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569663308] [2021-12-06 18:46:08,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:08,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:46:08,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:46:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:46:08,461 INFO L87 Difference]: Start difference. First operand 157 states and 167 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:46:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:08,685 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2021-12-06 18:46:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:46:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-06 18:46:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:08,686 INFO L225 Difference]: With dead ends: 162 [2021-12-06 18:46:08,686 INFO L226 Difference]: Without dead ends: 162 [2021-12-06 18:46:08,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 1 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 18:46:08,687 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 363 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:46:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-06 18:46:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-12-06 18:46:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 90 states have (on average 1.8222222222222222) internal successors, (164), 153 states have internal predecessors, (164), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 172 transitions. [2021-12-06 18:46:08,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 172 transitions. Word has length 29 [2021-12-06 18:46:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 172 transitions. [2021-12-06 18:46:08,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:46:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 172 transitions. [2021-12-06 18:46:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:46:08,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:08,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:08,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 18:46:08,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:08,894 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash -984859885, now seen corresponding path program 1 times [2021-12-06 18:46:08,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:08,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526588483] [2021-12-06 18:46:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:08,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:08,899 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:08,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 18:46:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:46:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:09,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:09,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:46:09,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-12-06 18:46:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:09,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526588483] [2021-12-06 18:46:09,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526588483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:09,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:09,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 18:46:09,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586774025] [2021-12-06 18:46:09,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:09,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:46:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:09,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:46:09,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:46:09,614 INFO L87 Difference]: Start difference. First operand 160 states and 172 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:46:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:10,494 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-12-06 18:46:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:46:10,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-06 18:46:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:10,497 INFO L225 Difference]: With dead ends: 167 [2021-12-06 18:46:10,497 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 18:46:10,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:46:10,497 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 16 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:10,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1162 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:46:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 18:46:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-12-06 18:46:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 90 states have (on average 1.8111111111111111) internal successors, (163), 153 states have internal predecessors, (163), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2021-12-06 18:46:10,502 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 29 [2021-12-06 18:46:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:10,502 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2021-12-06 18:46:10,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:46:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2021-12-06 18:46:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:46:10,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:10,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:10,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:10,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:10,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -465885389, now seen corresponding path program 1 times [2021-12-06 18:46:10,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327901757] [2021-12-06 18:46:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:10,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:10,710 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:10,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 18:46:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:10,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:46:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:10,819 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 18:46:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:10,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:10,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327901757] [2021-12-06 18:46:10,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327901757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:10,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:10,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:46:10,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452263484] [2021-12-06 18:46:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:10,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:46:10,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:46:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:10,867 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:11,473 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2021-12-06 18:46:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:46:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 18:46:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:11,475 INFO L225 Difference]: With dead ends: 160 [2021-12-06 18:46:11,475 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 18:46:11,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:46:11,476 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 22 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:11,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 498 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:46:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 18:46:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-12-06 18:46:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.8) internal successors, (162), 152 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2021-12-06 18:46:11,479 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 30 [2021-12-06 18:46:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:11,480 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2021-12-06 18:46:11,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2021-12-06 18:46:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:46:11,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:11,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:11,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 18:46:11,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:11,682 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash -465885388, now seen corresponding path program 1 times [2021-12-06 18:46:11,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381528925] [2021-12-06 18:46:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:11,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:11,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:11,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:11,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 18:46:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:46:11,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:11,908 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 18:46:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:11,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:11,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381528925] [2021-12-06 18:46:11,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381528925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:11,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:11,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:46:11,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595713618] [2021-12-06 18:46:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:11,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:46:11,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:46:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:11,989 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:12,720 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-12-06 18:46:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:46:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 18:46:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:12,722 INFO L225 Difference]: With dead ends: 158 [2021-12-06 18:46:12,722 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 18:46:12,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:46:12,722 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 20 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:12,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 528 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:46:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 18:46:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-06 18:46:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.788888888888889) internal successors, (161), 151 states have internal predecessors, (161), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:46:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2021-12-06 18:46:12,726 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 30 [2021-12-06 18:46:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:12,726 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2021-12-06 18:46:12,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:46:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2021-12-06 18:46:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:46:12,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:12,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:12,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 18:46:12,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:12,928 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1959133359, now seen corresponding path program 1 times [2021-12-06 18:46:12,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:12,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8757958] [2021-12-06 18:46:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:12,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:12,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:12,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:12,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 18:46:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:13,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:46:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:46:13,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:46:13,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8757958] [2021-12-06 18:46:13,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8757958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:13,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:13,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 18:46:13,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239210993] [2021-12-06 18:46:13,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:13,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:46:13,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:46:13,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:13,186 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:46:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:13,201 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2021-12-06 18:46:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:46:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-06 18:46:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:13,203 INFO L225 Difference]: With dead ends: 146 [2021-12-06 18:46:13,203 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 18:46:13,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:13,203 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 124 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:13,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 309 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:46:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 18:46:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-06 18:46:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 140 states have internal predecessors, (147), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2021-12-06 18:46:13,207 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 41 [2021-12-06 18:46:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2021-12-06 18:46:13,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:46:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2021-12-06 18:46:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:46:13,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:13,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:13,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 18:46:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:13,409 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash -930567857, now seen corresponding path program 1 times [2021-12-06 18:46:13,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:13,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679427654] [2021-12-06 18:46:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:13,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:13,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:13,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:13,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 18:46:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:46:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:13,667 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 18:46:13,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:46:13,787 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:46:13,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-06 18:46:13,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:46:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:13,903 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 16 treesize of output 18 [2021-12-06 18:46:14,158 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:46:14,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-12-06 18:46:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:14,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:14,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679427654] [2021-12-06 18:46:14,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679427654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1571254297] [2021-12-06 18:46:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:14,443 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:46:14,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:46:14,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-06 18:46:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:46:14,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:14,741 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:46:14,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-06 18:46:14,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:46:14,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 18:46:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:14,875 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 18:46:14,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 35 [2021-12-06 18:46:14,951 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:46:14,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 18:46:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:15,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:15,171 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 18:46:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 44 [2021-12-06 18:46:15,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:46:15,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-12-06 18:46:15,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:15,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:15,767 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 18:46:15,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 49 [2021-12-06 18:46:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:46:16,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:16,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1571254297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:16,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:16,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-12-06 18:46:16,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966987662] [2021-12-06 18:46:16,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:16,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:46:16,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:46:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:46:16,176 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:46:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:23,116 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2021-12-06 18:46:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:46:23,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-06 18:46:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:23,117 INFO L225 Difference]: With dead ends: 153 [2021-12-06 18:46:23,117 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 18:46:23,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:46:23,118 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 11 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:23,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 903 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 262 Invalid, 0 Unknown, 500 Unchecked, 0.4s Time] [2021-12-06 18:46:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 18:46:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-12-06 18:46:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 90 states have (on average 1.7) internal successors, (153), 146 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 159 transitions. [2021-12-06 18:46:23,122 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 159 transitions. Word has length 43 [2021-12-06 18:46:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:23,122 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 159 transitions. [2021-12-06 18:46:23,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:46:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 159 transitions. [2021-12-06 18:46:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:46:23,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:23,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:23,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-12-06 18:46:23,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 18:46:23,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:23,524 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -930567856, now seen corresponding path program 1 times [2021-12-06 18:46:23,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:23,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039177674] [2021-12-06 18:46:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:23,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:23,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:23,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:23,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 18:46:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 18:46:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:23,820 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 18:46:23,826 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 18:46:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:46:23,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 18:46:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:25,985 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 18:46:25,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:46:25,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:46:26,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:46:28,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:28,198 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 18:46:28,467 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:46:28,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:46:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:28,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:28,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039177674] [2021-12-06 18:46:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039177674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150202064] [2021-12-06 18:46:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:28,809 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:46:28,809 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:46:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-06 18:46:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 18:46:29,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:29,123 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 18:46:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:46:29,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:29,245 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 18:46:29,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:46:31,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:31,553 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 18:46:31,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:46:31,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:31,988 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 18:46:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:46:32,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:36,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150202064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:36,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:36,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-06 18:46:36,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141689221] [2021-12-06 18:46:36,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:36,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:46:36,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:46:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=432, Unknown=5, NotChecked=0, Total=506 [2021-12-06 18:46:36,233 INFO L87 Difference]: Start difference. First operand 153 states and 159 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:46:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:39,260 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2021-12-06 18:46:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:46:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-06 18:46:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:39,261 INFO L225 Difference]: With dead ends: 152 [2021-12-06 18:46:39,261 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 18:46:39,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=112, Invalid=694, Unknown=6, NotChecked=0, Total=812 [2021-12-06 18:46:39,262 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 14 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:39,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 878 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 296 Invalid, 0 Unknown, 459 Unchecked, 0.7s Time] [2021-12-06 18:46:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 18:46:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-06 18:46:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 90 states have (on average 1.6888888888888889) internal successors, (152), 145 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2021-12-06 18:46:39,265 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 43 [2021-12-06 18:46:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:39,265 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2021-12-06 18:46:39,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:46:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2021-12-06 18:46:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 18:46:39,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:39,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:39,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:39,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:39,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:39,668 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883970, now seen corresponding path program 1 times [2021-12-06 18:46:39,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:39,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347484131] [2021-12-06 18:46:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:39,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:39,671 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:39,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 18:46:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:39,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 18:46:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:39,962 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 18:46:40,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-06 18:46:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:40,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-06 18:46:40,497 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 18:46:40,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 48 [2021-12-06 18:46:40,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-12-06 18:46:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:40,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:40,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347484131] [2021-12-06 18:46:40,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347484131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845748429] [2021-12-06 18:46:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:40,907 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:40,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:46:40,908 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:46:40,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-12-06 18:46:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:46:41,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:41,293 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 18:46:41,690 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 18 treesize of output 14 [2021-12-06 18:46:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-06 18:46:41,978 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 18:46:41,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 43 [2021-12-06 18:46:42,126 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 30 treesize of output 18 [2021-12-06 18:46:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:42,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845748429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:42,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:42,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-12-06 18:46:42,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142181222] [2021-12-06 18:46:42,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:42,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:46:42,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:46:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=601, Unknown=6, NotChecked=0, Total=702 [2021-12-06 18:46:42,408 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand has 25 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:46:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:43,780 INFO L93 Difference]: Finished difference Result 255 states and 268 transitions. [2021-12-06 18:46:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:46:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-06 18:46:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:43,782 INFO L225 Difference]: With dead ends: 255 [2021-12-06 18:46:43,782 INFO L226 Difference]: Without dead ends: 255 [2021-12-06 18:46:43,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=957, Unknown=10, NotChecked=0, Total=1122 [2021-12-06 18:46:43,783 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 132 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:43,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 479 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 524 Invalid, 0 Unknown, 180 Unchecked, 1.1s Time] [2021-12-06 18:46:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-06 18:46:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 159. [2021-12-06 18:46:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.7422680412371134) internal successors, (169), 152 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2021-12-06 18:46:43,787 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 46 [2021-12-06 18:46:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:43,787 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2021-12-06 18:46:43,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:46:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2021-12-06 18:46:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 18:46:43,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:43,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:43,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:44,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 18:46:44,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:44,189 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883971, now seen corresponding path program 1 times [2021-12-06 18:46:44,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:44,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006504314] [2021-12-06 18:46:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:44,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:44,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:44,195 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:44,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 18:46:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:46:44,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:44,538 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 18:46:44,545 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 18:46:44,955 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 28 treesize of output 20 [2021-12-06 18:46:44,960 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 7 treesize of output 3 [2021-12-06 18:46:45,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:45,386 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 16 treesize of output 18 [2021-12-06 18:46:45,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:45,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-06 18:46:45,417 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 18:46:45,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-12-06 18:46:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:45,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 16 [2021-12-06 18:46:45,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:46:45,562 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 25 treesize of output 13 [2021-12-06 18:46:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:45,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:46,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006504314] [2021-12-06 18:46:46,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006504314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649908740] [2021-12-06 18:46:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:46,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:46:46,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:46:46,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-06 18:46:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:46:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:46,916 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 18:46:46,923 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 18:46:47,560 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 28 treesize of output 20 [2021-12-06 18:46:47,565 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 7 treesize of output 3 [2021-12-06 18:46:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:47,930 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 16 treesize of output 18 [2021-12-06 18:46:47,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:46:47,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:47,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 18:46:47,971 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 18:46:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 18:46:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:46:48,156 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 25 treesize of output 13 [2021-12-06 18:46:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:48,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:48,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649908740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:48,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:48,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 27 [2021-12-06 18:46:48,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673169966] [2021-12-06 18:46:48,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:48,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:46:48,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:46:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=932, Unknown=7, NotChecked=0, Total=1056 [2021-12-06 18:46:48,756 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 28 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:46:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:50,939 INFO L93 Difference]: Finished difference Result 256 states and 268 transitions. [2021-12-06 18:46:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:46:50,939 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-06 18:46:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:50,941 INFO L225 Difference]: With dead ends: 256 [2021-12-06 18:46:50,941 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 18:46:50,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=188, Invalid=1441, Unknown=11, NotChecked=0, Total=1640 [2021-12-06 18:46:50,942 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 139 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:50,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 563 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 669 Invalid, 0 Unknown, 172 Unchecked, 1.5s Time] [2021-12-06 18:46:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 18:46:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 159. [2021-12-06 18:46:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.7216494845360826) internal successors, (167), 152 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 173 transitions. [2021-12-06 18:46:50,945 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 173 transitions. Word has length 46 [2021-12-06 18:46:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:50,946 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 173 transitions. [2021-12-06 18:46:50,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:46:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 173 transitions. [2021-12-06 18:46:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 18:46:50,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:50,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:50,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 18:46:51,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-12-06 18:46:51,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:46:51,348 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1771238793, now seen corresponding path program 1 times [2021-12-06 18:46:51,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:51,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248548423] [2021-12-06 18:46:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:51,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:51,353 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:51,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 18:46:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:51,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:46:51,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:46:51,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:51,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:51,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248548423] [2021-12-06 18:46:51,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248548423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:51,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:51,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:46:51,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807783307] [2021-12-06 18:46:51,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:51,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:46:51,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:51,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:46:51,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:46:51,568 INFO L87 Difference]: Start difference. First operand 159 states and 173 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:46:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:51,601 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2021-12-06 18:46:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:46:51,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-06 18:46:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:51,602 INFO L225 Difference]: With dead ends: 155 [2021-12-06 18:46:51,602 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 18:46:51,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 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 18:46:51,603 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 122 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:51,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 284 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:46:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 18:46:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-12-06 18:46:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 92 states have (on average 1.673913043478261) internal successors, (154), 147 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2021-12-06 18:46:51,606 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 47 [2021-12-06 18:46:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:51,607 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2021-12-06 18:46:51,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:46:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2021-12-06 18:46:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:46:51,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:51,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:51,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 18:46:51,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:51,808 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1351857860, now seen corresponding path program 1 times [2021-12-06 18:46:51,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:51,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683384678] [2021-12-06 18:46:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:51,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:51,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:51,809 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:51,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 18:46:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:51,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:46:51,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:46:52,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:46:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:46:52,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683384678] [2021-12-06 18:46:52,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683384678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:46:52,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:46:52,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 18:46:52,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758585561] [2021-12-06 18:46:52,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:46:52,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:46:52,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:46:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:46:52,651 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:46:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:52,694 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2021-12-06 18:46:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:46:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2021-12-06 18:46:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:52,695 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:46:52,696 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 18:46:52,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:46:52,696 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 224 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:52,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 372 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:46:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 18:46:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-06 18:46:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 144 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-12-06 18:46:52,699 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 49 [2021-12-06 18:46:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:52,700 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-12-06 18:46:52,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:46:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-12-06 18:46:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:46:52,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:52,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:52,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 18:46:52,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:52,901 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1042077693, now seen corresponding path program 1 times [2021-12-06 18:46:52,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:52,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127357120] [2021-12-06 18:46:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:52,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:52,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:52,902 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:52,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 18:46:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:53,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:46:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:46:53,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:53,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127357120] [2021-12-06 18:46:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127357120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:53,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:53,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:46:53,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905001980] [2021-12-06 18:46:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:53,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:46:53,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:46:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:46:53,122 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:53,423 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2021-12-06 18:46:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:46:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-06 18:46:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:53,424 INFO L225 Difference]: With dead ends: 168 [2021-12-06 18:46:53,424 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 18:46:53,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 18:46:53,425 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 103 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:53,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 197 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:46:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 18:46:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2021-12-06 18:46:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.6373626373626373) internal successors, (149), 143 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2021-12-06 18:46:53,428 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 50 [2021-12-06 18:46:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:53,428 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2021-12-06 18:46:53,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2021-12-06 18:46:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:46:53,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:53,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:53,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 18:46:53,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:53,630 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1042077694, now seen corresponding path program 1 times [2021-12-06 18:46:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043992464] [2021-12-06 18:46:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:53,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:53,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:53,635 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 18:46:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:53,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:46:53,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:46:53,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:53,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043992464] [2021-12-06 18:46:53,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043992464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:53,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:53,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:46:53,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926183126] [2021-12-06 18:46:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:53,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:46:53,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:46:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:46:53,962 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:54,457 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2021-12-06 18:46:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:46:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-06 18:46:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:54,459 INFO L225 Difference]: With dead ends: 149 [2021-12-06 18:46:54,459 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 18:46:54,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 18:46:54,459 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 106 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:54,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 195 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:46:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 18:46:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-06 18:46:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 142 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2021-12-06 18:46:54,462 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 50 [2021-12-06 18:46:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:54,463 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2021-12-06 18:46:54,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2021-12-06 18:46:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:46:54,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:54,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:54,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 18:46:54,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:54,664 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1042078141, now seen corresponding path program 1 times [2021-12-06 18:46:54,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:54,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476812571] [2021-12-06 18:46:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:54,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:54,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:54,668 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:54,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 18:46:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:46:54,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:46:54,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:54,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476812571] [2021-12-06 18:46:54,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476812571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:54,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:54,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:46:54,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106705675] [2021-12-06 18:46:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:54,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:46:54,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:46:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:46:54,926 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:55,152 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2021-12-06 18:46:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:46:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-06 18:46:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:55,153 INFO L225 Difference]: With dead ends: 161 [2021-12-06 18:46:55,153 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 18:46:55,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 18:46:55,154 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 95 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:55,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 112 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:46:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 18:46:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2021-12-06 18:46:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5604395604395604) internal successors, (142), 136 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2021-12-06 18:46:55,157 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 50 [2021-12-06 18:46:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:55,157 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2021-12-06 18:46:55,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2021-12-06 18:46:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:46:55,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:55,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:55,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 18:46:55,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:55,359 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1042078142, now seen corresponding path program 1 times [2021-12-06 18:46:55,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:55,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3880681] [2021-12-06 18:46:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:55,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:55,364 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:55,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 18:46:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:55,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:46:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:46:55,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:55,804 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3880681] [2021-12-06 18:46:55,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3880681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:55,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:55,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:46:55,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33856062] [2021-12-06 18:46:55,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:55,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:46:55,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:46:55,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:46:55,806 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:46:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:56,018 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-12-06 18:46:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:46:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-12-06 18:46:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:56,019 INFO L225 Difference]: With dead ends: 137 [2021-12-06 18:46:56,019 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 18:46:56,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:56,020 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 293 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:56,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 124 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:46:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 18:46:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-06 18:46:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 130 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2021-12-06 18:46:56,023 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 50 [2021-12-06 18:46:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:56,023 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2021-12-06 18:46:56,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:46:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2021-12-06 18:46:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:46:56,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:56,023 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:56,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:56,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:56,224 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:56,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2055329846, now seen corresponding path program 1 times [2021-12-06 18:46:56,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448288662] [2021-12-06 18:46:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:56,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:56,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:56,230 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:56,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 18:46:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:46:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:56,444 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 18:46:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:56,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:56,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448288662] [2021-12-06 18:46:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448288662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:56,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:46:56,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413670626] [2021-12-06 18:46:56,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:56,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:46:56,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:46:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:56,489 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:57,027 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-12-06 18:46:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:46:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-06 18:46:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:57,029 INFO L225 Difference]: With dead ends: 149 [2021-12-06 18:46:57,029 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 18:46:57,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:57,029 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:57,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 267 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:46:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 18:46:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2021-12-06 18:46:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 124 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2021-12-06 18:46:57,032 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 51 [2021-12-06 18:46:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:57,032 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2021-12-06 18:46:57,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2021-12-06 18:46:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:46:57,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:57,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:57,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:57,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:57,234 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2055329845, now seen corresponding path program 1 times [2021-12-06 18:46:57,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:57,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262038298] [2021-12-06 18:46:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:57,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:57,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:57,238 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:57,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 18:46:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:46:57,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:57,455 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 18:46:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:46:57,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:46:57,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:46:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262038298] [2021-12-06 18:46:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262038298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:57,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:46:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974231586] [2021-12-06 18:46:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:57,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:46:57,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:46:57,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:46:57,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:46:57,547 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:58,139 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-12-06 18:46:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:46:58,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-06 18:46:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:58,140 INFO L225 Difference]: With dead ends: 125 [2021-12-06 18:46:58,141 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 18:46:58,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:46:58,141 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 82 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:58,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 278 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:46:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 18:46:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-06 18:46:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 118 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:46:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2021-12-06 18:46:58,144 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 51 [2021-12-06 18:46:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:58,144 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2021-12-06 18:46:58,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:46:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2021-12-06 18:46:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 18:46:58,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:58,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:58,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-06 18:46:58,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:46:58,346 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:46:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 512975501, now seen corresponding path program 1 times [2021-12-06 18:46:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:46:58,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211595903] [2021-12-06 18:46:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:58,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:46:58,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:46:58,352 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:46:58,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 18:46:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 18:46:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:58,750 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 18:46:59,008 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:46:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:46:59,138 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 11 treesize of output 7 [2021-12-06 18:46:59,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:46:59,388 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:46:59,389 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 32 treesize of output 33 [2021-12-06 18:46:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2021-12-06 18:46:59,609 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:46:59,610 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 58 treesize of output 46 [2021-12-06 18:46:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 18:46:59,623 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 7 treesize of output 3 [2021-12-06 18:47:00,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:00,079 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:47:00,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 62 [2021-12-06 18:47:00,141 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-06 18:47:00,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 84 [2021-12-06 18:47:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:00,164 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 14 treesize of output 16 [2021-12-06 18:47:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:47:01,077 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:47:01,077 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 87 treesize of output 55 [2021-12-06 18:47:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:01,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:02,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:47:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211595903] [2021-12-06 18:47:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211595903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528465527] [2021-12-06 18:47:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:02,260 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:47:02,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:47:02,261 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:47:02,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-06 18:47:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 18:47:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:02,967 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 18:47:03,361 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:47:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 18:47:03,669 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 11 treesize of output 7 [2021-12-06 18:47:03,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:04,200 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:47:04,200 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 32 treesize of output 33 [2021-12-06 18:47:04,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:04,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2021-12-06 18:47:04,676 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:47:04,676 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 54 treesize of output 37 [2021-12-06 18:47:04,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 18:47:04,688 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 7 treesize of output 3 [2021-12-06 18:47:05,096 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-06 18:47:05,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 83 [2021-12-06 18:47:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:05,131 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:47:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-12-06 18:47:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:05,157 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 14 treesize of output 16 [2021-12-06 18:47:05,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:47:06,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:47:06,485 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 82 treesize of output 45 [2021-12-06 18:47:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:07,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:07,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528465527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:07,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:47:07,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2021-12-06 18:47:07,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362072759] [2021-12-06 18:47:07,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:07,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:47:07,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:47:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:47:07,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2044, Unknown=9, NotChecked=0, Total=2256 [2021-12-06 18:47:07,594 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:47:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:08,778 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2021-12-06 18:47:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:47:08,779 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-12-06 18:47:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:08,779 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:47:08,779 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 18:47:08,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=266, Invalid=2584, Unknown=12, NotChecked=0, Total=2862 [2021-12-06 18:47:08,781 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 25 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:08,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 498 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 255 Unchecked, 0.5s Time] [2021-12-06 18:47:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 18:47:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-06 18:47:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 117 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:47:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-12-06 18:47:08,783 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 53 [2021-12-06 18:47:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:08,783 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-12-06 18:47:08,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:47:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-12-06 18:47:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 18:47:08,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:08,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:08,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-06 18:47:09,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 18:47:09,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:47:09,186 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:47:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash 512975502, now seen corresponding path program 1 times [2021-12-06 18:47:09,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:47:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467946380] [2021-12-06 18:47:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:47:09,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:47:09,189 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:47:09,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 18:47:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:47:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:09,585 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 18:47:09,590 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 18:47:10,005 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:47:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:47:10,028 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 18:47:10,199 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 11 treesize of output 7 [2021-12-06 18:47:10,206 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 11 treesize of output 7 [2021-12-06 18:47:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:10,554 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:47:10,554 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 51 treesize of output 48 [2021-12-06 18:47:10,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:47:10,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:10,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:47:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 38 [2021-12-06 18:47:10,918 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:47:10,918 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 79 treesize of output 55 [2021-12-06 18:47:10,930 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:47:10,930 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:47:10,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-12-06 18:47:10,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-12-06 18:47:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:11,488 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:47:11,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 76 [2021-12-06 18:47:11,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:11,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:11,517 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:47:11,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 18:47:11,556 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:47:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2021-12-06 18:47:11,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-06 18:47:12,662 INFO L354 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2021-12-06 18:47:12,662 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 91 treesize of output 58 [2021-12-06 18:47:12,693 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-06 18:47:12,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-12-06 18:47:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:15,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:47:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467946380] [2021-12-06 18:47:15,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467946380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098098629] [2021-12-06 18:47:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:15,034 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:47:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:47:15,034 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:47:15,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-06 18:47:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 18:47:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:15,827 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 18:47:15,833 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 18:47:16,360 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:47:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:47:16,402 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:47:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:47:16,921 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 11 treesize of output 7 [2021-12-06 18:47:16,939 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 11 treesize of output 7 [2021-12-06 18:47:17,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:17,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:17,745 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:47:17,745 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 52 treesize of output 49 [2021-12-06 18:47:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:47:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2021-12-06 18:47:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:17,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:47:18,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:47:18,544 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 78 treesize of output 49 [2021-12-06 18:47:18,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 18:47:18,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-12-06 18:47:18,563 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:47:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:19,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 20 treesize of output 22 [2021-12-06 18:47:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:19,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 18:47:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:19,054 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:47:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 74 [2021-12-06 18:47:19,086 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:47:19,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 49 [2021-12-06 18:47:20,171 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:47:20,171 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 91 treesize of output 49 [2021-12-06 18:47:20,193 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:47:20,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 18:47:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:20,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:22,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098098629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:22,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:47:22,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2021-12-06 18:47:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904817283] [2021-12-06 18:47:22,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:22,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:47:22,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:47:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:47:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2062, Unknown=3, NotChecked=0, Total=2256 [2021-12-06 18:47:22,771 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:47:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:24,440 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-12-06 18:47:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:47:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-12-06 18:47:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:24,442 INFO L225 Difference]: With dead ends: 123 [2021-12-06 18:47:24,442 INFO L226 Difference]: Without dead ends: 123 [2021-12-06 18:47:24,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=261, Invalid=2702, Unknown=7, NotChecked=0, Total=2970 [2021-12-06 18:47:24,443 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 100 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:24,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 530 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 228 Invalid, 0 Unknown, 330 Unchecked, 0.6s Time] [2021-12-06 18:47:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-06 18:47:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-12-06 18:47:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 91 states have (on average 1.3406593406593406) internal successors, (122), 116 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:47:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2021-12-06 18:47:24,445 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 53 [2021-12-06 18:47:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:24,446 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2021-12-06 18:47:24,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:47:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2021-12-06 18:47:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:47:24,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:24,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:24,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-06 18:47:24,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-06 18:47:24,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:47:24,848 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:47:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -951779474, now seen corresponding path program 1 times [2021-12-06 18:47:24,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:47:24,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935177794] [2021-12-06 18:47:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:24,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:47:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:47:24,852 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:47:24,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 18:47:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:25,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:47:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:47:25,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:47:25,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:47:25,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935177794] [2021-12-06 18:47:25,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935177794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:25,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:25,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:25,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367453965] [2021-12-06 18:47:25,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:25,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:47:25,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:47:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:47:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:47:25,160 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:47:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:25,385 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2021-12-06 18:47:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:47:25,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-12-06 18:47:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:25,386 INFO L225 Difference]: With dead ends: 138 [2021-12-06 18:47:25,386 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 18:47:25,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 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 18:47:25,386 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 164 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:25,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 122 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:47:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 18:47:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-12-06 18:47:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 113 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:47:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-12-06 18:47:25,389 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 55 [2021-12-06 18:47:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:25,389 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-12-06 18:47:25,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:47:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-12-06 18:47:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:47:25,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:25,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:25,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-06 18:47:25,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:47:25,591 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:47:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash -951779473, now seen corresponding path program 1 times [2021-12-06 18:47:25,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:47:25,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082889254] [2021-12-06 18:47:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:25,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:47:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:47:25,595 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:47:25,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 18:47:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:47:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:47:25,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:47:25,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:47:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082889254] [2021-12-06 18:47:25,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082889254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:25,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:25,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:47:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052077889] [2021-12-06 18:47:25,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:25,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:25,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:47:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:25,960 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:47:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:26,225 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-12-06 18:47:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:47:26,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-12-06 18:47:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:26,226 INFO L225 Difference]: With dead ends: 117 [2021-12-06 18:47:26,226 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 18:47:26,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:47:26,227 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:26,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 124 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:47:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 18:47:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-06 18:47:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 110 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:47:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2021-12-06 18:47:26,229 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 55 [2021-12-06 18:47:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:26,229 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2021-12-06 18:47:26,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:47:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2021-12-06 18:47:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:47:26,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:26,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:26,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-06 18:47:26,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:47:26,431 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:47:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash 167962770, now seen corresponding path program 1 times [2021-12-06 18:47:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:47:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963912067] [2021-12-06 18:47:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:26,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:47:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:47:26,436 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:47:26,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 18:47:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:47:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:26,936 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 18:47:26,942 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 18:47:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:47:27,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:27,127 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 18:47:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:27,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:47:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:27,412 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 18:47:27,839 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 7 treesize of output 3 [2021-12-06 18:47:27,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:27,906 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 18:47:28,300 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:47:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:47:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:28,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:29,125 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:47:29,125 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 31 treesize of output 32 [2021-12-06 18:47:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:29,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 18:47:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:29,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 18:47:29,438 INFO L354 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2021-12-06 18:47:29,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-12-06 18:47:29,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:47:29,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-06 18:47:35,854 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-12-06 18:47:35,854 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 48 treesize of output 36 [2021-12-06 18:47:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:36,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:43,736 INFO L354 Elim1Store]: treesize reduction 5, result has 91.8 percent of original size [2021-12-06 18:47:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 208 [2021-12-06 18:47:44,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:47:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963912067] [2021-12-06 18:47:44,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963912067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [241043413] [2021-12-06 18:47:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:44,714 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:47:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:47:44,715 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:47:44,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-06 18:47:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:47:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:45,319 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 18:47:45,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:45,883 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 18:47:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:46,056 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 18:47:46,233 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 7 treesize of output 3 [2021-12-06 18:47:46,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:46,254 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 18:47:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:47:46,649 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:47:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:47:47,338 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:47:47,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 37 [2021-12-06 18:47:47,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:47:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 18:47:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:47:47,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 18:47:47,585 INFO L354 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2021-12-06 18:47:47,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-12-06 18:47:47,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:47:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-06 18:47:50,082 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-12-06 18:47:50,082 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 48 treesize of output 36 [2021-12-06 18:47:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:50,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:06,844 INFO L354 Elim1Store]: treesize reduction 5, result has 94.4 percent of original size [2021-12-06 18:48:06,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 291 [2021-12-06 18:48:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [241043413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:08,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:48:08,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 33 [2021-12-06 18:48:08,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930725502] [2021-12-06 18:48:08,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:08,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:48:08,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:48:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:48:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2799, Unknown=74, NotChecked=0, Total=3080 [2021-12-06 18:48:08,324 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand has 34 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:48:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:13,275 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2021-12-06 18:48:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:48:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-06 18:48:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:13,277 INFO L225 Difference]: With dead ends: 121 [2021-12-06 18:48:13,277 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 18:48:13,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=278, Invalid=3930, Unknown=82, NotChecked=0, Total=4290 [2021-12-06 18:48:13,278 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 20 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:13,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 914 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 0 Unknown, 583 Unchecked, 0.9s Time] [2021-12-06 18:48:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 18:48:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-06 18:48:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 114 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:48:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2021-12-06 18:48:13,281 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 57 [2021-12-06 18:48:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:13,281 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2021-12-06 18:48:13,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:48:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2021-12-06 18:48:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:48:13,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:13,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:13,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-12-06 18:48:13,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 18:48:13,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:48:13,684 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:48:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash 167962771, now seen corresponding path program 1 times [2021-12-06 18:48:13,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:48:13,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181698809] [2021-12-06 18:48:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:13,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:48:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:48:13,686 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:48:13,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 18:48:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:14,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:48:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:14,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:14,260 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 14 treesize of output 16 [2021-12-06 18:48:14,275 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 18:48:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:14,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 18:48:14,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:48:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:14,524 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 18:48:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:14,560 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:48:14,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 50 [2021-12-06 18:48:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:14,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 18:48:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:48:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:15,003 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:48:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2021-12-06 18:48:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:15,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-06 18:48:15,976 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 53 treesize of output 33 [2021-12-06 18:48:15,986 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 7 treesize of output 3 [2021-12-06 18:48:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-12-06 18:48:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:48:16,823 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:48:16,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:48:16,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:48:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2021-12-06 18:48:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-12-06 18:48:16,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:16,943 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:48:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 48 [2021-12-06 18:48:18,877 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:48:18,878 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 61 treesize of output 54 [2021-12-06 18:48:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:18,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:48:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 16 [2021-12-06 18:48:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:19,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 47 treesize of output 41 [2021-12-06 18:48:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:19,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 47 treesize of output 41 [2021-12-06 18:48:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:48:19,377 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 14 treesize of output 16 [2021-12-06 18:48:19,469 INFO L354 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2021-12-06 18:48:19,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2021-12-06 18:48:19,517 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 18:48:19,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:48:21,649 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-12-06 18:48:21,649 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 59 treesize of output 35 [2021-12-06 18:48:21,673 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-06 18:48:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-12-06 18:48:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:24,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:10,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:49:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181698809] [2021-12-06 18:49:10,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181698809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971848437] [2021-12-06 18:49:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:10,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:49:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:49:10,036 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:49:10,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-06 18:49:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:49:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 18:49:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:49:11,232 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 18:49:12,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:49:12,743 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 18:49:13,744 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:49:13,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:49:14,725 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 11 treesize of output 7 [2021-12-06 18:49:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:49:16,474 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:49:16,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-12-06 18:49:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:16,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 40 [2021-12-06 18:49:18,434 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:49:18,435 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 86 treesize of output 49 [2021-12-06 18:49:18,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 18:49:18,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-12-06 18:49:18,466 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 7 treesize of output 3 [2021-12-06 18:49:22,019 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:49:22,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:49:22,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:49:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:22,122 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:49:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 82 [2021-12-06 18:49:22,209 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:49:22,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-12-06 18:49:22,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 18 [2021-12-06 18:49:28,244 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:49:28,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 70 [2021-12-06 18:49:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:28,272 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 27 treesize of output 27 [2021-12-06 18:49:28,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 18:49:29,088 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:49:29,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:49:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:49:29,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 39 treesize of output 35 [2021-12-06 18:49:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:29,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 39 treesize of output 35 [2021-12-06 18:49:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:29,918 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 14 treesize of output 16 [2021-12-06 18:49:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:31,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 39 treesize of output 35 [2021-12-06 18:49:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:49:31,065 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 14 treesize of output 16 [2021-12-06 18:49:33,993 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 40 treesize of output 20 [2021-12-06 18:49:34,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:49:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:49:36,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:36,387 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-06 18:49:36,431 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-06 18:49:36,579 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-06 18:49:36,671 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-06 18:49:36,719 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|) v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) .cse1 v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) .cse1 v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-06 18:49:36,787 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|) v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) .cse1 v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) .cse1 v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-06 18:49:37,007 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base|) |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset|) v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base|) |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset|))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base| v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) .cse1 v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base| v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) .cse1 v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-06 18:49:37,130 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) .cse1 v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3436) .cse1 v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (store (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3437) (select (select |c_#memory_$Pointer$.base| .cse3) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) v_ArrVal_3440)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32)))))) is different from false [2021-12-06 18:49:37,231 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (store (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3437) (select (select |c_#memory_$Pointer$.base| .cse1) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) v_ArrVal_3440)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3433 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3432 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3440 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_3433) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3437) .cse3 v_ArrVal_3440) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_3432) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3436) .cse3 v_ArrVal_3439) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-06 18:49:42,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971848437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:49:42,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:49:42,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 34] total 58 [2021-12-06 18:49:42,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914980891] [2021-12-06 18:49:42,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:49:42,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 18:49:42,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:49:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 18:49:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4640, Unknown=57, NotChecked=1314, Total=6320 [2021-12-06 18:49:42,158 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 59 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 49 states have internal predecessors, (102), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:49:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:49:59,473 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-12-06 18:49:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:49:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 49 states have internal predecessors, (102), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2021-12-06 18:49:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:49:59,474 INFO L225 Difference]: With dead ends: 121 [2021-12-06 18:49:59,474 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 18:49:59,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 82.9s TimeCoverageRelationStatistics Valid=540, Invalid=8363, Unknown=63, NotChecked=1746, Total=10712 [2021-12-06 18:49:59,481 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 11 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:49:59,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 678 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 386 Unchecked, 0.4s Time] [2021-12-06 18:49:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 18:49:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-06 18:49:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.263157894736842) internal successors, (120), 114 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:49:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2021-12-06 18:49:59,484 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 57 [2021-12-06 18:49:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:49:59,484 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2021-12-06 18:49:59,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 49 states have internal predecessors, (102), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:49:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2021-12-06 18:49:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 18:49:59,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:49:59,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:49:59,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-06 18:49:59,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-12-06 18:49:59,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:49:59,887 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:49:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:49:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1157560249, now seen corresponding path program 1 times [2021-12-06 18:49:59,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:49:59,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771729037] [2021-12-06 18:49:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:49:59,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:49:59,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:49:59,891 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:49:59,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 18:50:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:00,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:50:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:00,230 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 18:50:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:50:00,652 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 23 treesize of output 15 [2021-12-06 18:50:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:50:00,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:50:00,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:50:00,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771729037] [2021-12-06 18:50:00,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771729037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:00,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:00,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:50:00,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369012928] [2021-12-06 18:50:00,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:00,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:50:00,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:50:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:50:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:50:00,735 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:50:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:02,893 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2021-12-06 18:50:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:50:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-12-06 18:50:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:02,895 INFO L225 Difference]: With dead ends: 181 [2021-12-06 18:50:02,896 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 18:50:02,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:50:02,896 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 145 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:02,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 555 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 18:50:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 18:50:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 121. [2021-12-06 18:50:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 96 states have (on average 1.2604166666666667) internal successors, (121), 114 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:50:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2021-12-06 18:50:02,899 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 58 [2021-12-06 18:50:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:02,900 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2021-12-06 18:50:02,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:50:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2021-12-06 18:50:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 18:50:02,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:02,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:02,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-06 18:50:03,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:50:03,102 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:50:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1157560248, now seen corresponding path program 1 times [2021-12-06 18:50:03,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:50:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449072916] [2021-12-06 18:50:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:03,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:50:03,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:50:03,107 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:50:03,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 18:50:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:50:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:03,426 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 18:50:03,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:50:03,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:50:04,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-06 18:50:04,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:50:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:50:04,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:50:04,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:50:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449072916] [2021-12-06 18:50:04,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449072916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:04,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:04,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:50:04,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185508799] [2021-12-06 18:50:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:04,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:50:04,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:50:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:50:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:50:04,148 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:50:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:06,262 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-12-06 18:50:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:50:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-12-06 18:50:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:06,265 INFO L225 Difference]: With dead ends: 163 [2021-12-06 18:50:06,265 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 18:50:06,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:50:06,266 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 131 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:06,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 615 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:50:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 18:50:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 123. [2021-12-06 18:50:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:50:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2021-12-06 18:50:06,269 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 58 [2021-12-06 18:50:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:06,269 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2021-12-06 18:50:06,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:50:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2021-12-06 18:50:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 18:50:06,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:06,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:06,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-06 18:50:06,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:50:06,471 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:50:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1796531691, now seen corresponding path program 1 times [2021-12-06 18:50:06,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:50:06,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194510669] [2021-12-06 18:50:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:06,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:50:06,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:50:06,475 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:50:06,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-06 18:50:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 18:50:06,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:06,942 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 18:50:07,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 18:50:07,401 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:50:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:50:07,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-06 18:50:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:50:08,450 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:50:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 50 [2021-12-06 18:50:09,128 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 19 treesize of output 18 [2021-12-06 18:50:09,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:50:09,635 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 14 treesize of output 16 [2021-12-06 18:50:09,698 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 14 treesize of output 16 [2021-12-06 18:50:10,593 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:50:10,593 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 1 case distinctions, treesize of input 49 treesize of output 46 [2021-12-06 18:50:10,607 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 18 treesize of output 20 [2021-12-06 18:50:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:10,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 44 treesize of output 35 [2021-12-06 18:50:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:11,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 21 treesize of output 20 [2021-12-06 18:50:12,082 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:50:12,082 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 87 treesize of output 58 [2021-12-06 18:50:12,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-12-06 18:50:12,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:50:12,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:50:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:13,451 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:50:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 85 [2021-12-06 18:50:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:50:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:13,559 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:50:13,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 72 [2021-12-06 18:50:13,639 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 14 treesize of output 16 [2021-12-06 18:50:17,314 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:50:17,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 91 [2021-12-06 18:50:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2021-12-06 18:50:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 18:50:17,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-06 18:50:17,813 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:50:17,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:50:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:50:17,911 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:50:17,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-12-06 18:50:17,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:50:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-06 18:50:18,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:18,412 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 42 treesize of output 38 [2021-12-06 18:50:18,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:50:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:18,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:50:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 42 treesize of output 38 [2021-12-06 18:50:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:50:19,071 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 14 treesize of output 16 [2021-12-06 18:50:19,724 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 35 treesize of output 19 [2021-12-06 18:50:19,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-06 18:50:20,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:50:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:50:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:21,397 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3817) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:50:21,426 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3817) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:50:21,477 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset| v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:50:21,553 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset| v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:50:21,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|))) (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset| v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) .cse0 v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) .cse0 v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) .cse0 v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:50:21,629 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|))) (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset| v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) .cse0 v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) .cse0 v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) .cse0 v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:50:21,663 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base|) |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset|))) (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base|) |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset| v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) .cse0 v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base| v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) .cse0 v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_#t~mem10#1.base| v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) .cse0 v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-06 18:50:21,697 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))) (select (select (store (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3813) .cse2 v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3814) .cse2 v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3815) .cse2 v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:50:21,738 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3809 (_ BitVec 32)) (v_ArrVal_3815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3814 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3817 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3816 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3808 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3807 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3818 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))) (select (select (store (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_ArrVal_3809)) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3813) .cse2 v_ArrVal_3817) (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3807) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3814) .cse2 v_ArrVal_3818) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3808) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3815) .cse2 v_ArrVal_3816) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-06 18:50:22,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:50:22,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194510669] [2021-12-06 18:50:22,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194510669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:22,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [420367978] [2021-12-06 18:50:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:22,658 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:50:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:50:22,659 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:50:22,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-12-06 18:50:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 18:50:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:23,684 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 18:50:23,709 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:50:24,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:50:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:25,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-06 18:50:25,445 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 18:50:26,506 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:50:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:50:26,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:50:27,684 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 13 treesize of output 9 [2021-12-06 18:50:28,853 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 18:50:28,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2021-12-06 18:50:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:28,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-06 18:50:30,317 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 11 treesize of output 7 [2021-12-06 18:50:30,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 19 treesize of output 18 [2021-12-06 18:50:31,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:50:31,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:50:32,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:50:32,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:50:33,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:33,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:50:33,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:33,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:50:35,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 40 [2021-12-06 18:50:35,088 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 18:50:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-12-06 18:50:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:50:35,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 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 7 treesize of output 3 [2021-12-06 18:50:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:35,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:50:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2021-12-06 18:50:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,381 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 18 treesize of output 20 [2021-12-06 18:50:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 18:50:54,572 INFO L354 Elim1Store]: treesize reduction 62, result has 34.7 percent of original size [2021-12-06 18:50:54,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 78 [2021-12-06 18:50:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:50:55,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-06 18:51:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:05,893 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-12-06 18:51:05,893 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 4 case distinctions, treesize of input 149 treesize of output 131 [2021-12-06 18:51:05,936 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 35 treesize of output 30 [2021-12-06 18:51:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:05,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 18:51:06,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:51:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:51:07,462 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:51:07,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:51:07,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:51:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:07,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2021-12-06 18:51:07,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:51:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:09,159 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 66 treesize of output 60 [2021-12-06 18:51:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:51:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:51:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:51:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2021-12-06 18:51:16,987 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 23 treesize of output 22 [2021-12-06 18:51:17,133 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-12-06 18:51:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 62 [2021-12-06 18:51:17,208 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:51:17,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:51:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 16 [2021-12-06 18:51:23,154 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 50 treesize of output 26 [2021-12-06 18:51:23,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:51:25,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-06 18:51:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:25,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:45,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [420367978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:45,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:51:45,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 40] total 74 [2021-12-06 18:51:45,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715819154] [2021-12-06 18:51:45,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:45,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 18:51:45,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:51:45,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 18:51:45,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=7460, Unknown=41, NotChecked=1638, Total=9506 [2021-12-06 18:51:45,421 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 74 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 63 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:52:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:36,631 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-12-06 18:52:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:52:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 63 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2021-12-06 18:52:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:36,633 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:52:36,633 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 18:52:36,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 3605 ImplicationChecksByTransitivity, 125.0s TimeCoverageRelationStatistics Valid=643, Invalid=13614, Unknown=59, NotChecked=2196, Total=16512 [2021-12-06 18:52:36,638 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1131 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:36,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1726 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 205 Invalid, 0 Unknown, 1131 Unchecked, 0.8s Time] [2021-12-06 18:52:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 18:52:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-06 18:52:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:52:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2021-12-06 18:52:36,641 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 59 [2021-12-06 18:52:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:36,641 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2021-12-06 18:52:36,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 63 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:52:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2021-12-06 18:52:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 18:52:36,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:36,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:36,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-12-06 18:52:36,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-12-06 18:52:37,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:52:37,043 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-12-06 18:52:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:37,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1796531692, now seen corresponding path program 1 times [2021-12-06 18:52:37,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:52:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466090931] [2021-12-06 18:52:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:37,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:52:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:52:37,049 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:52:37,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 18:52:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 18:52:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:37,680 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 18:52:37,692 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 18:52:37,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:52:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:52:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:52:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 18:52:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:52:38,149 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 18:52:38,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:52:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:52:38,855 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 18:52:39,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:52:40,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:52:40,206 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 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-06 18:52:40,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:52:40,222 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 7 treesize of output 3 [2021-12-06 18:52:41,532 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:52:41,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:52:41,600 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:52:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:52:41,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:52:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:52:41,734 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 18:52:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 35 [2021-12-06 18:52:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:52:42,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:52:42,716 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 1 case distinctions, treesize of input 34 treesize of output 17 [2021-12-06 18:52:44,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:52:44,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-06 18:52:44,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:52:44,850 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:52:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:52:44,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:52:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:52:45,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:52:45,719 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 18:52:45,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:52:46,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:52:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:16,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:53:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466090931] [2021-12-06 18:53:16,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466090931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120522091] [2021-12-06 18:53:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:16,520 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:53:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:53:16,520 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:53:16,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-12-06 18:53:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 18:53:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:17,194 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 18:53:17,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:53:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:53:18,839 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 18:53:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:53:19,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:53:19,637 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 18:53:22,384 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 7 treesize of output 3 [2021-12-06 18:53:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:53:25,819 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:53:25,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:53:25,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:53:25,899 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:53:25,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:53:29,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:53:29,471 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 23 treesize of output 18 [2021-12-06 18:53:30,985 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:53:30,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:53:31,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:53:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:53:31,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:53:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:53:31,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:53:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:53:31,835 INFO L354 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2021-12-06 18:53:31,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2021-12-06 18:53:33,244 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-12-06 18:53:33,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-12-06 18:53:33,271 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-06 18:53:33,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-12-06 18:53:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:37,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:41,538 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 173 treesize of output 165 [2021-12-06 18:55:27,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-06 18:55:27,227 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-06 18:55:27,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-06 18:55:27,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859713323] [2021-12-06 18:55:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:27,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:27,229 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:27,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 18:55:27,380 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@4b92b0f8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 18:55:27,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:55:27,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-12-06 18:55:27,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647010468] [2021-12-06 18:55:27,382 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:27,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:55:27,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:55:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:55:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=5901, Unknown=156, NotChecked=0, Total=6480 [2021-12-06 18:55:27,383 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 34 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:55:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:55:27,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=423, Invalid=5901, Unknown=156, NotChecked=0, Total=6480 [2021-12-06 18:55:27,384 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 18:55:27,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:27,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-12-06 18:55:27,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2021-12-06 18:55:27,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 18:55:27,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f92c339-87a3-479d-bb20-e4fbee16c795/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:27,986 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@4b92b0f8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 18:55:27,989 INFO L158 Benchmark]: Toolchain (without parser) took 568726.20ms. Allocated memory was 65.0MB in the beginning and 98.6MB in the end (delta: 33.6MB). Free memory was 45.7MB in the beginning and 33.5MB in the end (delta: 12.2MB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. [2021-12-06 18:55:27,989 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 65.0MB. Free memory was 45.9MB in the beginning and 45.8MB in the end (delta: 95.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:55:27,989 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.60ms. Allocated memory is still 65.0MB. Free memory was 45.5MB in the beginning and 38.9MB in the end (delta: 6.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:55:27,989 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.17ms. Allocated memory is still 65.0MB. Free memory was 38.9MB in the beginning and 36.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:55:27,990 INFO L158 Benchmark]: Boogie Preprocessor took 28.06ms. Allocated memory is still 65.0MB. Free memory was 36.5MB in the beginning and 34.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:55:27,990 INFO L158 Benchmark]: RCFGBuilder took 715.48ms. Allocated memory was 65.0MB in the beginning and 98.6MB in the end (delta: 33.6MB). Free memory was 34.1MB in the beginning and 62.4MB in the end (delta: -28.3MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2021-12-06 18:55:27,990 INFO L158 Benchmark]: TraceAbstraction took 567653.58ms. Allocated memory is still 98.6MB. Free memory was 61.9MB in the beginning and 33.5MB in the end (delta: 28.5MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2021-12-06 18:55:27,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 65.0MB. Free memory was 45.9MB in the beginning and 45.8MB in the end (delta: 95.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 284.60ms. Allocated memory is still 65.0MB. Free memory was 45.5MB in the beginning and 38.9MB in the end (delta: 6.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.17ms. Allocated memory is still 65.0MB. Free memory was 38.9MB in the beginning and 36.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.06ms. Allocated memory is still 65.0MB. Free memory was 36.5MB in the beginning and 34.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 715.48ms. Allocated memory was 65.0MB in the beginning and 98.6MB in the end (delta: 33.6MB). Free memory was 34.1MB in the beginning and 62.4MB in the end (delta: -28.3MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * TraceAbstraction took 567653.58ms. Allocated memory is still 98.6MB. Free memory was 61.9MB in the beginning and 33.5MB in the end (delta: 28.5MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@4b92b0f8 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@4b92b0f8: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@4b92b0f8