./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF --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 e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:34:49,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:34:49,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:34:49,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:34:49,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:34:49,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:34:49,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:34:49,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:34:49,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:34:49,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:34:49,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:34:49,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:34:49,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:34:49,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:34:49,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:34:49,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:34:49,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:34:49,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:34:49,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:34:49,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:34:49,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:34:49,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:34:49,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:34:49,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:34:49,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:34:49,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:34:49,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:34:49,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:34:49,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:34:49,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:34:49,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:34:49,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:34:49,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:34:49,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:34:49,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:34:49,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:34:49,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:34:49,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:34:49,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:34:49,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:34:49,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:34:49,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:34:49,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:34:49,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:34:49,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:34:49,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:34:49,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:34:49,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:34:49,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:34:49,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:34:49,281 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:34:49,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:34:49,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:34:49,289 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:34:49,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:34:49,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:34:49,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:34:49,290 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:34:49,290 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:34:49,290 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:34:49,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:34:49,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:34:49,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:34:49,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:34:49,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:34:49,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:34:49,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:34:49,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:34:49,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:34:49,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:34:49,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:34:49,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:34:49,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:34:49,294 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_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-20 07:34:49,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:34:49,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:34:49,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:34:49,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:34:49,579 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:34:49,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-20 07:34:49,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/data/ea9aacfc2/dd0b108252e34249b9862133c367a65f/FLAGb4fc8f474 [2021-11-20 07:34:50,314 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:34:50,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-20 07:34:50,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/data/ea9aacfc2/dd0b108252e34249b9862133c367a65f/FLAGb4fc8f474 [2021-11-20 07:34:50,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/data/ea9aacfc2/dd0b108252e34249b9862133c367a65f [2021-11-20 07:34:50,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:34:50,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:34:50,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:34:50,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:34:50,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:34:50,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:34:50" (1/1) ... [2021-11-20 07:34:50,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52867163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:50, skipping insertion in model container [2021-11-20 07:34:50,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:34:50" (1/1) ... [2021-11-20 07:34:50,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:34:50,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:34:51,021 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_83988633-ab4c-4646-8b5e-4b3a8a6c5518/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-20 07:34:51,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:34:51,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:34:51,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-20 07:34:51,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:34:51,147 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:34:51,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51 WrapperNode [2021-11-20 07:34:51,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:34:51,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:34:51,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:34:51,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:34:51,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,233 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2021-11-20 07:34:51,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:34:51,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:34:51,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:34:51,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:34:51,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:34:51,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:34:51,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:34:51,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:34:51,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (1/1) ... [2021-11-20 07:34:51,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:34:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:51,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:34:51,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:34:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:34:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:34:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 07:34:51,368 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 07:34:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:34:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:34:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:34:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:34:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:34:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:34:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:34:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:34:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:34:51,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:34:51,567 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:34:51,568 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:34:51,963 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:34:51,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:34:51,971 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:34:51,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:34:51 BoogieIcfgContainer [2021-11-20 07:34:51,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:34:51,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:34:51,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:34:51,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:34:51,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:34:50" (1/3) ... [2021-11-20 07:34:51,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26efffcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:34:51, skipping insertion in model container [2021-11-20 07:34:51,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:34:51" (2/3) ... [2021-11-20 07:34:51,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26efffcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:34:51, skipping insertion in model container [2021-11-20 07:34:51,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:34:51" (3/3) ... [2021-11-20 07:34:51,987 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-20 07:34:51,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:34:51,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-11-20 07:34:52,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:34:52,056 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 [2021-11-20 07:34:52,057 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-11-20 07:34:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 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) [2021-11-20 07:34:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:34:52,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:52,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:34:52,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 895303154, now seen corresponding path program 1 times [2021-11-20 07:34:52,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606111401] [2021-11-20 07:34:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:52,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:52,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606111401] [2021-11-20 07:34:52,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606111401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:52,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:52,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:34:52,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055354139] [2021-11-20 07:34:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:52,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:34:52,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:34:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:34:52,381 INFO L87 Difference]: Start difference. First operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 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) [2021-11-20 07:34:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:52,600 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-11-20 07:34:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:34:52,602 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 [2021-11-20 07:34:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:52,611 INFO L225 Difference]: With dead ends: 127 [2021-11-20 07:34:52,611 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:34:52,613 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 [2021-11-20 07:34:52,617 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:52,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:34:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:34:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-20 07:34:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 63 states have (on average 2.0) internal successors, (126), 119 states have internal predecessors, (126), 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) [2021-11-20 07:34:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-11-20 07:34:52,662 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 6 [2021-11-20 07:34:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:52,663 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-11-20 07:34:52,663 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) [2021-11-20 07:34:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-11-20 07:34:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:34:52,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:52,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:34:52,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:34:52,665 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash 895303155, now seen corresponding path program 1 times [2021-11-20 07:34:52,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:52,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413711808] [2021-11-20 07:34:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:52,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:52,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:52,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413711808] [2021-11-20 07:34:52,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413711808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:52,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:52,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:34:52,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133549916] [2021-11-20 07:34:52,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:52,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:34:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:34:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:34:52,723 INFO L87 Difference]: Start difference. First operand 124 states and 132 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) [2021-11-20 07:34:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:52,819 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-11-20 07:34:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:34:52,820 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 [2021-11-20 07:34:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:52,821 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:34:52,822 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:34:52,822 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 [2021-11-20 07:34:52,824 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:52,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 195 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:34:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:34:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-20 07:34:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 116 states have internal predecessors, (123), 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) [2021-11-20 07:34:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-11-20 07:34:52,838 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 6 [2021-11-20 07:34:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:52,838 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-11-20 07:34:52,839 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) [2021-11-20 07:34:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-11-20 07:34:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:34:52,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:52,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:52,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:34:52,840 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1495162356, now seen corresponding path program 1 times [2021-11-20 07:34:52,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:52,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15082083] [2021-11-20 07:34:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:52,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:52,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15082083] [2021-11-20 07:34:52,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15082083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:52,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:52,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:34:52,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040932533] [2021-11-20 07:34:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:52,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:34:52,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:34:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:34:52,934 INFO L87 Difference]: Start difference. First operand 121 states and 129 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) [2021-11-20 07:34:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:53,082 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-11-20 07:34:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:34:53,084 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 [2021-11-20 07:34:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:53,090 INFO L225 Difference]: With dead ends: 132 [2021-11-20 07:34:53,090 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 07:34:53,091 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 [2021-11-20 07:34:53,098 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:53,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 292 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:34:53,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 07:34:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2021-11-20 07:34:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 117 states have internal predecessors, (124), 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) [2021-11-20 07:34:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-11-20 07:34:53,112 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 14 [2021-11-20 07:34:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:53,112 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-11-20 07:34:53,113 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) [2021-11-20 07:34:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-11-20 07:34:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:34:53,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:53,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:53,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:34:53,114 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192736, now seen corresponding path program 1 times [2021-11-20 07:34:53,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:53,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828847482] [2021-11-20 07:34:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:53,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:34:53,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828847482] [2021-11-20 07:34:53,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828847482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:53,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:53,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:34:53,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911429153] [2021-11-20 07:34:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:53,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:34:53,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:34:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:34:53,240 INFO L87 Difference]: Start difference. First operand 122 states and 130 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) [2021-11-20 07:34:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:53,513 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-11-20 07:34:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:34:53,514 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 [2021-11-20 07:34:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:53,516 INFO L225 Difference]: With dead ends: 122 [2021-11-20 07:34:53,516 INFO L226 Difference]: Without dead ends: 122 [2021-11-20 07:34:53,517 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 [2021-11-20 07:34:53,518 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:53,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 394 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:34:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-20 07:34:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-11-20 07:34:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.921875) internal successors, (123), 116 states have internal predecessors, (123), 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) [2021-11-20 07:34:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-11-20 07:34:53,531 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 24 [2021-11-20 07:34:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:53,532 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-11-20 07:34:53,532 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) [2021-11-20 07:34:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-11-20 07:34:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:34:53,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:53,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:53,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:34:53,534 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192737, now seen corresponding path program 1 times [2021-11-20 07:34:53,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:53,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476142985] [2021-11-20 07:34:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:53,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:53,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:53,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476142985] [2021-11-20 07:34:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476142985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:53,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:34:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133848271] [2021-11-20 07:34:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:53,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:34:53,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:34:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:34:53,677 INFO L87 Difference]: Start difference. First operand 121 states and 129 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) [2021-11-20 07:34:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:53,965 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-11-20 07:34:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:34:53,971 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 [2021-11-20 07:34:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:53,972 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:34:53,972 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:34:53,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:34:53,973 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 19 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:53,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 418 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:34:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:34:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-11-20 07:34:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.90625) internal successors, (122), 115 states have internal predecessors, (122), 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) [2021-11-20 07:34:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-11-20 07:34:53,984 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 24 [2021-11-20 07:34:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-11-20 07:34:53,985 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) [2021-11-20 07:34:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-11-20 07:34:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:34:53,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:53,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:53,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:34:53,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash -408475519, now seen corresponding path program 1 times [2021-11-20 07:34:53,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602469083] [2021-11-20 07:34:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:53,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:54,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602469083] [2021-11-20 07:34:54,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602469083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:54,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926284072] [2021-11-20 07:34:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:54,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:54,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:54,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:54,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:34:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:54,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:34:54,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:54,360 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 [2021-11-20 07:34:54,565 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:34:54,565 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 14 [2021-11-20 07:34:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:54,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:34:54,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926284072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:54,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:34:54,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2021-11-20 07:34:54,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742084591] [2021-11-20 07:34:54,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:54,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:34:54,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:34:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:34:54,661 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 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) [2021-11-20 07:34:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:54,949 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-11-20 07:34:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:34:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 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 [2021-11-20 07:34:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:54,951 INFO L225 Difference]: With dead ends: 138 [2021-11-20 07:34:54,951 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 07:34:54,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:34:54,952 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 207 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:54,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 353 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:34:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 07:34:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-11-20 07:34:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 64 states have (on average 1.875) internal successors, (120), 113 states have internal predecessors, (120), 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) [2021-11-20 07:34:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2021-11-20 07:34:54,966 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 26 [2021-11-20 07:34:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:54,967 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2021-11-20 07:34:54,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 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) [2021-11-20 07:34:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2021-11-20 07:34:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:34:54,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:54,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:55,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:55,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:55,191 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:55,191 INFO L85 PathProgramCache]: Analyzing trace with hash -408475518, now seen corresponding path program 1 times [2021-11-20 07:34:55,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:55,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443302773] [2021-11-20 07:34:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:55,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:55,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:55,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:55,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443302773] [2021-11-20 07:34:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443302773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257195186] [2021-11-20 07:34:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:55,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:55,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:34:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:55,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:34:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:55,670 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 [2021-11-20 07:34:55,926 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:34:55,927 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 14 [2021-11-20 07:34:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:55,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:56,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257195186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:56,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:56,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 07:34:56,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668375541] [2021-11-20 07:34:56,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:56,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:34:56,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:34:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:34:56,116 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 13 states have internal predecessors, (39), 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) [2021-11-20 07:34:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:56,719 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-20 07:34:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:34:56,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 13 states have internal predecessors, (39), 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 [2021-11-20 07:34:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:56,725 INFO L225 Difference]: With dead ends: 125 [2021-11-20 07:34:56,725 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 07:34:56,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:34:56,726 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 17 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:56,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 791 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:34:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 07:34:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-20 07:34:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.838235294117647) internal successors, (125), 117 states have internal predecessors, (125), 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) [2021-11-20 07:34:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-11-20 07:34:56,745 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 26 [2021-11-20 07:34:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:56,745 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-11-20 07:34:56,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 13 states have internal predecessors, (39), 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) [2021-11-20 07:34:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-11-20 07:34:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:34:56,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:56,746 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] [2021-11-20 07:34:56,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:56,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:56,974 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1702795689, now seen corresponding path program 1 times [2021-11-20 07:34:56,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:56,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849734872] [2021-11-20 07:34:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:56,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:57,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849734872] [2021-11-20 07:34:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849734872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644005843] [2021-11-20 07:34:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:57,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:57,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:57,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:34:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:34:57,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:57,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:57,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644005843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:57,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:57,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-11-20 07:34:57,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763512645] [2021-11-20 07:34:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:57,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:34:57,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:34:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:34:57,413 INFO L87 Difference]: Start difference. First operand 123 states and 133 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) [2021-11-20 07:34:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:57,562 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2021-11-20 07:34:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:34:57,563 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 [2021-11-20 07:34:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:57,566 INFO L225 Difference]: With dead ends: 124 [2021-11-20 07:34:57,566 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:34:57,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:34:57,567 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:57,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 608 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:34:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:34:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-11-20 07:34:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 117 states have internal predecessors, (124), 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) [2021-11-20 07:34:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2021-11-20 07:34:57,579 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 28 [2021-11-20 07:34:57,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:57,579 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2021-11-20 07:34:57,579 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) [2021-11-20 07:34:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2021-11-20 07:34:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:34:57,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:57,581 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] [2021-11-20 07:34:57,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:57,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:57,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839470, now seen corresponding path program 1 times [2021-11-20 07:34:57,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:57,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955276966] [2021-11-20 07:34:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:57,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:34:57,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:57,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955276966] [2021-11-20 07:34:57,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955276966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:57,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597411165] [2021-11-20 07:34:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:57,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:57,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:57,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:57,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:34:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:34:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:34:58,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:58,048 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:34:58,048 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 [2021-11-20 07:34:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:34:58,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597411165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:58,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:58,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-11-20 07:34:58,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920952162] [2021-11-20 07:34:58,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:58,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:34:58,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:34:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:34:58,103 INFO L87 Difference]: Start difference. First operand 123 states and 132 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) [2021-11-20 07:34:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:58,296 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-11-20 07:34:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:34:58,297 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 [2021-11-20 07:34:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:58,298 INFO L225 Difference]: With dead ends: 128 [2021-11-20 07:34:58,298 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 07:34:58,298 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 [2021-11-20 07:34:58,299 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 12 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:58,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 288 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:34:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 07:34:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-20 07:34:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 71 states have (on average 1.8169014084507042) internal successors, (129), 120 states have internal predecessors, (129), 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) [2021-11-20 07:34:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2021-11-20 07:34:58,304 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 29 [2021-11-20 07:34:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:58,305 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2021-11-20 07:34:58,305 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) [2021-11-20 07:34:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2021-11-20 07:34:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:34:58,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:58,306 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] [2021-11-20 07:34:58,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:58,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:58,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839469, now seen corresponding path program 1 times [2021-11-20 07:34:58,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:58,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213923607] [2021-11-20 07:34:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:58,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:58,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:58,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213923607] [2021-11-20 07:34:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213923607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212181214] [2021-11-20 07:34:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:58,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:58,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:58,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:58,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:34:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:34:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:58,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:58,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:58,978 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 [2021-11-20 07:34:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:59,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212181214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:59,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:59,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-11-20 07:34:59,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299770692] [2021-11-20 07:34:59,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:59,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:34:59,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:34:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:34:59,176 INFO L87 Difference]: Start difference. First operand 126 states and 137 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) [2021-11-20 07:34:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:59,484 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-11-20 07:34:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:34:59,485 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 [2021-11-20 07:34:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:59,486 INFO L225 Difference]: With dead ends: 132 [2021-11-20 07:34:59,486 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 07:34:59,487 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 [2021-11-20 07:34:59,488 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 25 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:59,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1030 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:34:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 07:34:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-11-20 07:34:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 71 states have (on average 1.8028169014084507) internal successors, (128), 120 states have internal predecessors, (128), 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) [2021-11-20 07:34:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-11-20 07:34:59,493 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 29 [2021-11-20 07:34:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:59,494 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-11-20 07:34:59,494 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) [2021-11-20 07:34:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-11-20 07:34:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:34:59,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:59,495 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] [2021-11-20 07:34:59,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:59,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:34:59,719 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:34:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash -152317900, now seen corresponding path program 1 times [2021-11-20 07:34:59,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:59,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936668802] [2021-11-20 07:34:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:59,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:59,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:59,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:34:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:59,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936668802] [2021-11-20 07:34:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936668802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:59,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:59,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:34:59,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556255756] [2021-11-20 07:34:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:34:59,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:34:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:34:59,831 INFO L87 Difference]: Start difference. First operand 126 states and 136 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) [2021-11-20 07:35:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:00,113 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-20 07:35:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:35:00,114 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 [2021-11-20 07:35:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:00,115 INFO L225 Difference]: With dead ends: 125 [2021-11-20 07:35:00,115 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 07:35:00,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:35:00,116 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 19 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:00,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 464 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:35:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 07:35:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 07:35:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.7887323943661972) internal successors, (127), 119 states have internal predecessors, (127), 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) [2021-11-20 07:35:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-11-20 07:35:00,121 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 30 [2021-11-20 07:35:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:00,121 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-11-20 07:35:00,122 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) [2021-11-20 07:35:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-11-20 07:35:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:35:00,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:00,123 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] [2021-11-20 07:35:00,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:35:00,123 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1115824008, now seen corresponding path program 1 times [2021-11-20 07:35:00,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650261453] [2021-11-20 07:35:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:00,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:35:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:35:00,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650261453] [2021-11-20 07:35:00,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650261453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358129339] [2021-11-20 07:35:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:00,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:00,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:00,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:35:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:35:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:35:00,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:35:00,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358129339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:00,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:35:00,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-11-20 07:35:00,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460395104] [2021-11-20 07:35:00,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:00,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:35:00,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:35:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:35:00,373 INFO L87 Difference]: Start difference. First operand 125 states and 135 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) [2021-11-20 07:35:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:00,386 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-11-20 07:35:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:35:00,386 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 [2021-11-20 07:35:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:00,388 INFO L225 Difference]: With dead ends: 114 [2021-11-20 07:35:00,388 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 07:35:00,388 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 [2021-11-20 07:35:00,389 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 144 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 [2021-11-20 07:35:00,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 144 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:35:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 07:35:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-20 07:35:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.78125) internal successors, (114), 109 states have internal predecessors, (114), 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) [2021-11-20 07:35:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-11-20 07:35:00,394 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 41 [2021-11-20 07:35:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:00,394 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-11-20 07:35:00,394 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) [2021-11-20 07:35:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-11-20 07:35:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:35:00,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:00,396 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] [2021-11-20 07:35:00,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:00,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:00,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:00,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195673, now seen corresponding path program 1 times [2021-11-20 07:35:00,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:00,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950824436] [2021-11-20 07:35:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:00,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:35:00,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:00,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950824436] [2021-11-20 07:35:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950824436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715509043] [2021-11-20 07:35:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:00,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:00,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:00,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:35:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:00,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:35:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:00,953 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 [2021-11-20 07:35:00,969 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 [2021-11-20 07:35:01,030 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:35:01,031 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 14 [2021-11-20 07:35:01,105 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:35:01,105 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 16 treesize of output 12 [2021-11-20 07:35:01,155 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:35:01,155 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 3 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 07:35:01,352 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 [2021-11-20 07:35:01,460 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:35:01,460 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 17 treesize of output 19 [2021-11-20 07:35:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:35:01,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:11,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715509043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:11,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:11,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-11-20 07:35:11,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554825811] [2021-11-20 07:35:11,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:11,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:35:11,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:35:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=352, Unknown=5, NotChecked=0, Total=420 [2021-11-20 07:35:11,628 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-11-20 07:35:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:12,070 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2021-11-20 07:35:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:35:12,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 states have internal predecessors, (58), 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 43 [2021-11-20 07:35:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:12,072 INFO L225 Difference]: With dead ends: 129 [2021-11-20 07:35:12,072 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 07:35:12,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=86, Invalid=461, Unknown=5, NotChecked=0, Total=552 [2021-11-20 07:35:12,073 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 59 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:12,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 608 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2021-11-20 07:35:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 07:35:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2021-11-20 07:35:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.734375) internal successors, (111), 106 states have internal predecessors, (111), 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) [2021-11-20 07:35:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2021-11-20 07:35:12,078 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 43 [2021-11-20 07:35:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:12,078 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2021-11-20 07:35:12,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-11-20 07:35:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2021-11-20 07:35:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:35:12,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:12,080 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] [2021-11-20 07:35:12,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:12,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:35:12,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:12,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195672, now seen corresponding path program 1 times [2021-11-20 07:35:12,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:12,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110710350] [2021-11-20 07:35:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:12,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:12,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:12,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:12,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:35:12,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110710350] [2021-11-20 07:35:12,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110710350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378726776] [2021-11-20 07:35:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:12,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:12,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:12,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:12,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:35:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:12,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:35:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:12,688 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 [2021-11-20 07:35:12,709 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 [2021-11-20 07:35:12,835 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:35:12,836 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 15 treesize of output 17 [2021-11-20 07:35:12,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:35:12,949 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 15 [2021-11-20 07:35:13,049 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:35:13,049 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 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-20 07:35:13,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:35:13,342 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 15 [2021-11-20 07:35:13,433 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:35:13,434 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 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 07:35:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:13,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:35:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378726776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:13,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:35:13,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-20 07:35:13,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571269757] [2021-11-20 07:35:13,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:13,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:35:13,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:35:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:35:13,500 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 8 states, 5 states have (on average 4.6) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:35:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:13,586 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-11-20 07:35:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:35:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 4.6) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-20 07:35:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:13,587 INFO L225 Difference]: With dead ends: 110 [2021-11-20 07:35:13,587 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 07:35:13,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:35:13,588 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 7 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:13,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2021-11-20 07:35:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 07:35:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-20 07:35:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 64 states have (on average 1.71875) internal successors, (110), 105 states have internal predecessors, (110), 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) [2021-11-20 07:35:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2021-11-20 07:35:13,593 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 43 [2021-11-20 07:35:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:13,593 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2021-11-20 07:35:13,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 4.6) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:35:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2021-11-20 07:35:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:35:13,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:13,594 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] [2021-11-20 07:35:13,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:13,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:13,810 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1946956456, now seen corresponding path program 1 times [2021-11-20 07:35:13,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:13,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269284248] [2021-11-20 07:35:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:13,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:13,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:13,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:13,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269284248] [2021-11-20 07:35:13,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269284248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:13,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:13,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:35:13,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894822086] [2021-11-20 07:35:13,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:13,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:35:13,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:35:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:35:13,891 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-11-20 07:35:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:14,009 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-11-20 07:35:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:35:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 45 [2021-11-20 07:35:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:14,010 INFO L225 Difference]: With dead ends: 124 [2021-11-20 07:35:14,010 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:35:14,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:35:14,011 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 78 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:14,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 144 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:35:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-11-20 07:35:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.65625) internal successors, (106), 101 states have internal predecessors, (106), 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) [2021-11-20 07:35:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2021-11-20 07:35:14,016 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 45 [2021-11-20 07:35:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:14,016 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2021-11-20 07:35:14,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-11-20 07:35:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2021-11-20 07:35:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:35:14,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:14,017 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] [2021-11-20 07:35:14,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:35:14,017 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1946956457, now seen corresponding path program 1 times [2021-11-20 07:35:14,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:14,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515261596] [2021-11-20 07:35:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:14,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:14,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:14,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515261596] [2021-11-20 07:35:14,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515261596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:14,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:14,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:35:14,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106763412] [2021-11-20 07:35:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:14,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:35:14,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:35:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:35:14,133 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-20 07:35:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:14,266 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-11-20 07:35:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:35:14,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 45 [2021-11-20 07:35:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:14,271 INFO L225 Difference]: With dead ends: 102 [2021-11-20 07:35:14,271 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 07:35:14,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:35:14,274 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 238 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:14,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 152 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 07:35:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-20 07:35:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.59375) internal successors, (102), 97 states have internal predecessors, (102), 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) [2021-11-20 07:35:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2021-11-20 07:35:14,279 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 45 [2021-11-20 07:35:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:14,279 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2021-11-20 07:35:14,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-20 07:35:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2021-11-20 07:35:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:35:14,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:14,284 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] [2021-11-20 07:35:14,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:35:14,284 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 226108014, now seen corresponding path program 1 times [2021-11-20 07:35:14,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:14,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363422854] [2021-11-20 07:35:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:14,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:35:14,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363422854] [2021-11-20 07:35:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363422854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:14,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:14,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:35:14,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328436366] [2021-11-20 07:35:14,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:14,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:35:14,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:35:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:35:14,431 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-11-20 07:35:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:14,634 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-11-20 07:35:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:35:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 46 [2021-11-20 07:35:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:14,636 INFO L225 Difference]: With dead ends: 116 [2021-11-20 07:35:14,636 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 07:35:14,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:35:14,636 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 72 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:14,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 271 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:35:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 07:35:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-11-20 07:35:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.53125) internal successors, (98), 93 states have internal predecessors, (98), 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) [2021-11-20 07:35:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-11-20 07:35:14,640 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 46 [2021-11-20 07:35:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:14,641 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-11-20 07:35:14,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-11-20 07:35:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-11-20 07:35:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:35:14,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:14,642 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] [2021-11-20 07:35:14,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:35:14,642 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 226108015, now seen corresponding path program 1 times [2021-11-20 07:35:14,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:14,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602104416] [2021-11-20 07:35:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:14,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:35:14,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:14,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602104416] [2021-11-20 07:35:14,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602104416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:14,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:14,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:35:14,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643028179] [2021-11-20 07:35:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:14,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:35:14,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:35:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:35:14,747 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-20 07:35:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:14,953 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-11-20 07:35:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:35:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 46 [2021-11-20 07:35:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:14,954 INFO L225 Difference]: With dead ends: 94 [2021-11-20 07:35:14,954 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 07:35:14,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:35:14,955 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 71 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:14,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 274 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:35:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 07:35:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-20 07:35:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.46875) internal successors, (94), 89 states have internal predecessors, (94), 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) [2021-11-20 07:35:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-11-20 07:35:14,959 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 46 [2021-11-20 07:35:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:14,959 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-11-20 07:35:14,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-20 07:35:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-11-20 07:35:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:35:14,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:14,960 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] [2021-11-20 07:35:14,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:35:14,961 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash 226118937, now seen corresponding path program 1 times [2021-11-20 07:35:14,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:14,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047851029] [2021-11-20 07:35:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:14,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:15,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:15,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:35:15,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:15,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047851029] [2021-11-20 07:35:15,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047851029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:15,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395667449] [2021-11-20 07:35:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:15,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:15,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:15,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:35:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:35:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:15,773 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 13 treesize of output 9 [2021-11-20 07:35:23,151 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-20 07:35:23,151 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 3 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 07:35:23,163 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:35:23,163 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 37 treesize of output 39 [2021-11-20 07:35:25,277 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 07:35:25,277 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-11-20 07:35:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:35:25,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:35:25,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395667449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:25,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:35:25,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 26 [2021-11-20 07:35:25,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202981252] [2021-11-20 07:35:25,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:25,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:35:25,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:35:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=617, Unknown=6, NotChecked=0, Total=702 [2021-11-20 07:35:25,299 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 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) [2021-11-20 07:35:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:26,673 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-11-20 07:35:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:35:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 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 46 [2021-11-20 07:35:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:26,674 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:35:26,675 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:35:26,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=113, Invalid=750, Unknown=7, NotChecked=0, Total=870 [2021-11-20 07:35:26,676 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 18 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:26,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 480 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 332 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2021-11-20 07:35:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:35:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-20 07:35:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.453125) internal successors, (93), 88 states have internal predecessors, (93), 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) [2021-11-20 07:35:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-11-20 07:35:26,680 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 46 [2021-11-20 07:35:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:26,680 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-11-20 07:35:26,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 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) [2021-11-20 07:35:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-11-20 07:35:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:35:26,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:26,681 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] [2021-11-20 07:35:26,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:26,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:26,890 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash 226118938, now seen corresponding path program 1 times [2021-11-20 07:35:26,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:26,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514230348] [2021-11-20 07:35:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:26,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:27,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:27,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:35:27,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514230348] [2021-11-20 07:35:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514230348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341953760] [2021-11-20 07:35:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:27,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:27,879 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:27,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:35:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:35:27,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:28,564 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 29 treesize of output 21 [2021-11-20 07:35:28,569 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 11 treesize of output 7 [2021-11-20 07:35:34,991 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-20 07:35:34,992 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 3 case distinctions, treesize of input 96 treesize of output 88 [2021-11-20 07:35:35,047 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-20 07:35:35,047 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 3 case distinctions, treesize of input 85 treesize of output 73 [2021-11-20 07:35:35,058 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:35:35,059 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 74 treesize of output 74 [2021-11-20 07:35:35,073 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:35:35,073 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 68 treesize of output 70 [2021-11-20 07:35:35,384 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 07:35:35,384 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-11-20 07:35:35,392 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 07:35:35,393 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 32 [2021-11-20 07:35:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:35:35,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341953760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:40,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:40,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-11-20 07:35:40,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798331964] [2021-11-20 07:35:40,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:40,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:35:40,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:35:40,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1210, Unknown=4, NotChecked=0, Total=1332 [2021-11-20 07:35:40,067 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:35:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:49,431 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-11-20 07:35:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:35:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-11-20 07:35:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:49,432 INFO L225 Difference]: With dead ends: 92 [2021-11-20 07:35:49,432 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 07:35:49,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=228, Invalid=2116, Unknown=8, NotChecked=0, Total=2352 [2021-11-20 07:35:49,433 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 38 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:49,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 754 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 511 Invalid, 0 Unknown, 134 Unchecked, 0.6s Time] [2021-11-20 07:35:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 07:35:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 07:35:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.4375) internal successors, (92), 87 states have internal predecessors, (92), 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) [2021-11-20 07:35:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-11-20 07:35:49,437 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 46 [2021-11-20 07:35:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-11-20 07:35:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:35:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-11-20 07:35:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:35:49,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:49,439 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] [2021-11-20 07:35:49,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:49,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:49,647 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1475150796, now seen corresponding path program 1 times [2021-11-20 07:35:49,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:49,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114513660] [2021-11-20 07:35:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:49,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:49,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:49,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:49,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114513660] [2021-11-20 07:35:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114513660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:49,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:49,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:35:49,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933459923] [2021-11-20 07:35:49,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:49,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:35:49,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:49,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:35:49,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:35:49,727 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-20 07:35:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:49,857 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-11-20 07:35:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:35:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 49 [2021-11-20 07:35:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:49,858 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:35:49,858 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:35:49,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:35:49,859 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 147 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:49,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 168 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:35:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-11-20 07:35:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 64 states have (on average 1.421875) internal successors, (91), 86 states have internal predecessors, (91), 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) [2021-11-20 07:35:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-20 07:35:49,863 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 49 [2021-11-20 07:35:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:49,863 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-20 07:35:49,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-20 07:35:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-20 07:35:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:35:49,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:49,864 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] [2021-11-20 07:35:49,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:35:49,864 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1475150797, now seen corresponding path program 1 times [2021-11-20 07:35:49,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:49,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416022609] [2021-11-20 07:35:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:49,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:50,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416022609] [2021-11-20 07:35:50,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416022609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:50,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:35:50,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516155028] [2021-11-20 07:35:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:50,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:35:50,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:35:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:35:50,044 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 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) [2021-11-20 07:35:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:50,193 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-11-20 07:35:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:35:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 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 49 [2021-11-20 07:35:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:50,196 INFO L225 Difference]: With dead ends: 88 [2021-11-20 07:35:50,196 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:35:50,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:35:50,197 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 131 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:50,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 155 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:35:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-20 07:35:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.375) internal successors, (88), 83 states have internal predecessors, (88), 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) [2021-11-20 07:35:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-20 07:35:50,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 49 [2021-11-20 07:35:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-20 07:35:50,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 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) [2021-11-20 07:35:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-20 07:35:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:35:50,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:50,201 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] [2021-11-20 07:35:50,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:35:50,201 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:35:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 280709232, now seen corresponding path program 1 times [2021-11-20 07:35:50,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311666450] [2021-11-20 07:35:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:50,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:35:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:35:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:35:50,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311666450] [2021-11-20 07:35:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311666450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467436616] [2021-11-20 07:35:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:50,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:50,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:50,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:50,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:35:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:35:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:51,135 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 21 treesize of output 13 [2021-11-20 07:35:53,279 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (let ((.cse0 (+ |node_create_~temp~0#1.offset| 8))) (store (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset| 0) (+ |node_create_~temp~0#1.offset| 4) 0) .cse0 (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) .cse0)))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-20 07:35:53,365 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-20 07:35:53,366 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 3 case distinctions, treesize of input 50 treesize of output 38 [2021-11-20 07:35:53,496 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 07:35:53,497 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 24 [2021-11-20 07:35:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-20 07:35:53,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:55,705 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.offset_42| Int) (|v_node_create_~temp~0#1.base_47| Int) (v_DerPreprocessor_3 Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_47| (store (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_47|) |v_node_create_~temp~0#1.offset_42| 0) (+ |v_node_create_~temp~0#1.offset_42| 4) 0) (+ |v_node_create_~temp~0#1.offset_42| 8) v_DerPreprocessor_3)) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (or (<= (+ .cse0 1) 0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_47|) (<= 1 .cse0)))) is different from false [2021-11-20 07:35:55,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467436616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:55,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:55,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-11-20 07:35:55,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672265949] [2021-11-20 07:35:55,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:55,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:35:55,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:55,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:35:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=670, Unknown=2, NotChecked=106, Total=870 [2021-11-20 07:35:55,709 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 24 states have internal predecessors, (69), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:36:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:06,308 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-20 07:36:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:36:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 24 states have internal predecessors, (69), 4 states have call successors, (6), 3 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 51 [2021-11-20 07:36:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:06,309 INFO L225 Difference]: With dead ends: 85 [2021-11-20 07:36:06,309 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 07:36:06,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=161, Invalid=1175, Unknown=4, NotChecked=142, Total=1482 [2021-11-20 07:36:06,311 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:06,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 874 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 357 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2021-11-20 07:36:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 07:36:06,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-20 07:36:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 80 states have internal predecessors, (84), 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) [2021-11-20 07:36:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-11-20 07:36:06,314 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 51 [2021-11-20 07:36:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:06,315 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-11-20 07:36:06,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 24 states have internal predecessors, (69), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:36:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-11-20 07:36:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:36:06,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:06,316 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] [2021-11-20 07:36:06,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 07:36:06,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:36:06,542 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:36:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash 869466270, now seen corresponding path program 1 times [2021-11-20 07:36:06,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:06,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634698302] [2021-11-20 07:36:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:06,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:36:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:36:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:36:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:36:06,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:06,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634698302] [2021-11-20 07:36:06,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634698302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:36:06,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:36:06,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:36:06,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12798285] [2021-11-20 07:36:06,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:36:06,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:36:06,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:36:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:36:06,630 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-11-20 07:36:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:06,837 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-11-20 07:36:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:36:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 52 [2021-11-20 07:36:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:06,838 INFO L225 Difference]: With dead ends: 102 [2021-11-20 07:36:06,838 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 07:36:06,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:36:06,839 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 50 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:06,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 282 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:36:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 07:36:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2021-11-20 07:36:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.360655737704918) internal successors, (83), 79 states have internal predecessors, (83), 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) [2021-11-20 07:36:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-11-20 07:36:06,842 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 52 [2021-11-20 07:36:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:06,843 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-11-20 07:36:06,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-11-20 07:36:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-11-20 07:36:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:36:06,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:06,844 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] [2021-11-20 07:36:06,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 07:36:06,844 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:36:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 869466271, now seen corresponding path program 1 times [2021-11-20 07:36:06,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072398738] [2021-11-20 07:36:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:06,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:36:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:36:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:36:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:36:06,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:06,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072398738] [2021-11-20 07:36:06,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072398738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:36:06,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:36:06,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:36:06,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613239578] [2021-11-20 07:36:06,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:36:06,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:36:06,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:06,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:36:06,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:36:06,961 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-11-20 07:36:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:07,168 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-11-20 07:36:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:36:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 52 [2021-11-20 07:36:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:07,169 INFO L225 Difference]: With dead ends: 83 [2021-11-20 07:36:07,170 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 07:36:07,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:36:07,170 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 53 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:07,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:36:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 07:36:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-20 07:36:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 78 states have internal predecessors, (82), 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) [2021-11-20 07:36:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-20 07:36:07,174 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 52 [2021-11-20 07:36:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:07,174 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-20 07:36:07,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-11-20 07:36:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-20 07:36:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:36:07,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:07,175 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] [2021-11-20 07:36:07,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 07:36:07,175 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:36:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1183650644, now seen corresponding path program 1 times [2021-11-20 07:36:07,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:07,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536239376] [2021-11-20 07:36:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:07,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:07,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:36:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:07,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:36:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:07,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:36:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:36:08,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:08,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536239376] [2021-11-20 07:36:08,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536239376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:08,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062908174] [2021-11-20 07:36:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:08,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:08,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:08,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:36:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:08,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 07:36:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:08,940 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 19 treesize of output 15 [2021-11-20 07:36:09,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:36:09,131 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 32 treesize of output 35 [2021-11-20 07:36:09,146 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 32 treesize of output 28 [2021-11-20 07:36:09,152 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:36:09,152 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 28 treesize of output 24 [2021-11-20 07:36:17,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:36:17,723 INFO L354 Elim1Store]: treesize reduction 283, result has 9.6 percent of original size [2021-11-20 07:36:17,724 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 4 case distinctions, treesize of input 94 treesize of output 88 [2021-11-20 07:36:17,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:36:17,746 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-20 07:36:17,746 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 2 case distinctions, treesize of input 83 treesize of output 75 [2021-11-20 07:36:17,782 INFO L354 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2021-11-20 07:36:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 101 [2021-11-20 07:36:18,160 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 07:36:18,160 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 84 [2021-11-20 07:36:18,314 INFO L354 Elim1Store]: treesize reduction 67, result has 17.3 percent of original size [2021-11-20 07:36:18,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 50 [2021-11-20 07:36:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:36:18,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062908174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:19,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:19,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-11-20 07:36:19,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484144921] [2021-11-20 07:36:19,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:36:19,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:36:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2101, Unknown=2, NotChecked=0, Total=2256 [2021-11-20 07:36:19,399 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 42 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:36:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:37,026 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-11-20 07:36:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:36:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-11-20 07:36:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:37,028 INFO L225 Difference]: With dead ends: 100 [2021-11-20 07:36:37,028 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 07:36:37,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=288, Invalid=3612, Unknown=6, NotChecked=0, Total=3906 [2021-11-20 07:36:37,030 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 85 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:37,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 796 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 751 Invalid, 0 Unknown, 245 Unchecked, 0.6s Time] [2021-11-20 07:36:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 07:36:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2021-11-20 07:36:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 77 states have internal predecessors, (81), 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) [2021-11-20 07:36:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-20 07:36:37,034 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 53 [2021-11-20 07:36:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:37,034 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-20 07:36:37,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:36:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-20 07:36:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:36:37,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:37,036 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] [2021-11-20 07:36:37,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:37,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:36:37,262 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:36:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1183650645, now seen corresponding path program 1 times [2021-11-20 07:36:37,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513636323] [2021-11-20 07:36:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:37,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:37,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:36:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:36:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:37,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:36:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:36:39,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:39,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513636323] [2021-11-20 07:36:39,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513636323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:39,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663915266] [2021-11-20 07:36:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:39,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:39,030 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:39,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:36:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 07:36:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:39,701 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 42 treesize of output 38 [2021-11-20 07:36:39,711 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 41 treesize of output 37 [2021-11-20 07:36:39,960 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 07:36:39,961 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 84 treesize of output 47 [2021-11-20 07:36:39,975 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-20 07:36:39,975 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 44 treesize of output 38 [2021-11-20 07:36:39,980 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 30 treesize of output 28 [2021-11-20 07:36:39,985 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:36:39,985 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 25 treesize of output 21 [2021-11-20 07:36:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:36:48,607 INFO L354 Elim1Store]: treesize reduction 283, result has 9.6 percent of original size [2021-11-20 07:36:48,607 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 4 case distinctions, treesize of input 146 treesize of output 118 [2021-11-20 07:36:48,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:36:48,688 INFO L354 Elim1Store]: treesize reduction 257, result has 9.8 percent of original size [2021-11-20 07:36:48,688 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 4 case distinctions, treesize of input 135 treesize of output 111 [2021-11-20 07:36:48,707 INFO L354 Elim1Store]: treesize reduction 57, result has 25.0 percent of original size [2021-11-20 07:36:48,708 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 124 treesize of output 126 [2021-11-20 07:36:48,740 INFO L354 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2021-11-20 07:36:48,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 125 [2021-11-20 07:36:49,365 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-20 07:36:49,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 90 [2021-11-20 07:36:49,386 INFO L354 Elim1Store]: treesize reduction 66, result has 12.0 percent of original size [2021-11-20 07:36:49,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 52 [2021-11-20 07:36:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:36:49,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663915266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:53,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:53,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2021-11-20 07:36:53,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035375549] [2021-11-20 07:36:53,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:53,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 07:36:53,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 07:36:53,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2292, Unknown=3, NotChecked=0, Total=2450 [2021-11-20 07:36:53,373 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 45 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:37:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:15,583 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-11-20 07:37:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:37:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-11-20 07:37:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:15,585 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:37:15,585 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:37:15,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=325, Invalid=4360, Unknown=7, NotChecked=0, Total=4692 [2021-11-20 07:37:15,587 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:15,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1003 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 604 Invalid, 0 Unknown, 205 Unchecked, 0.5s Time] [2021-11-20 07:37:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:37:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-20 07:37:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 76 states have internal predecessors, (80), 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) [2021-11-20 07:37:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-11-20 07:37:15,591 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 53 [2021-11-20 07:37:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:15,591 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-11-20 07:37:15,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:37:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-11-20 07:37:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:37:15,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:15,592 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] [2021-11-20 07:37:15,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:15,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:37:15,811 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:37:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -939292314, now seen corresponding path program 1 times [2021-11-20 07:37:15,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319576441] [2021-11-20 07:37:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:15,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:16,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:37:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:16,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:37:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:37:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:37:17,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:17,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319576441] [2021-11-20 07:37:17,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319576441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:17,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:17,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-20 07:37:17,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577656306] [2021-11-20 07:37:17,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:17,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:37:17,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:37:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:37:17,368 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 28 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:37:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:18,966 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-11-20 07:37:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:37:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-11-20 07:37:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:18,967 INFO L225 Difference]: With dead ends: 102 [2021-11-20 07:37:18,967 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 07:37:18,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 07:37:18,969 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 632 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:18,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 323 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:37:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 07:37:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 81. [2021-11-20 07:37:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 76 states have internal predecessors, (81), 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) [2021-11-20 07:37:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-11-20 07:37:18,972 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 58 [2021-11-20 07:37:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:18,973 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-11-20 07:37:18,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:37:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-11-20 07:37:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:37:18,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:18,974 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] [2021-11-20 07:37:18,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 07:37:18,974 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:37:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -939292313, now seen corresponding path program 1 times [2021-11-20 07:37:18,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836754175] [2021-11-20 07:37:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:18,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:37:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:37:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:37:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:37:20,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836754175] [2021-11-20 07:37:20,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836754175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:20,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:20,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-20 07:37:20,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923166444] [2021-11-20 07:37:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:20,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:37:20,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:37:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:37:20,237 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:37:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:21,752 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-11-20 07:37:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:37:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-11-20 07:37:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:21,755 INFO L225 Difference]: With dead ends: 86 [2021-11-20 07:37:21,755 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 07:37:21,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:37:21,756 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 526 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:21,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 395 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:37:21,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 07:37:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-20 07:37:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.296875) internal successors, (83), 78 states have internal predecessors, (83), 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) [2021-11-20 07:37:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-11-20 07:37:21,760 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 58 [2021-11-20 07:37:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:21,760 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-11-20 07:37:21,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:37:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-11-20 07:37:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:37:21,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:21,762 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, 1] [2021-11-20 07:37:21,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 07:37:21,762 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:37:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:21,763 INFO L85 PathProgramCache]: Analyzing trace with hash -716779287, now seen corresponding path program 1 times [2021-11-20 07:37:21,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:21,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752288093] [2021-11-20 07:37:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:21,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:37:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:37:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:23,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:37:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:37:24,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:24,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752288093] [2021-11-20 07:37:24,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752288093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859129065] [2021-11-20 07:37:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:24,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:24,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:24,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:24,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:37:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-20 07:37:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:25,791 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 [2021-11-20 07:37:26,135 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 41 [2021-11-20 07:37:26,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:37:26,141 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 41 treesize of output 28 [2021-11-20 07:37:26,146 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 [2021-11-20 07:37:26,572 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 [2021-11-20 07:37:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:26,986 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 97 treesize of output 85 [2021-11-20 07:37:26,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:26,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:26,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:27,021 INFO L354 Elim1Store]: treesize reduction 160, result has 6.4 percent of original size [2021-11-20 07:37:27,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 84 [2021-11-20 07:37:27,033 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:37:27,033 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 83 treesize of output 83 [2021-11-20 07:37:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:28,737 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 23 treesize of output 11 [2021-11-20 07:37:28,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:28,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 112 [2021-11-20 07:37:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:28,770 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-11-20 07:37:28,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 85 [2021-11-20 07:37:28,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 07:37:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 43 [2021-11-20 07:37:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,037 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-20 07:37:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,260 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-11-20 07:37:29,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 173 treesize of output 145 [2021-11-20 07:37:29,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,294 INFO L354 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2021-11-20 07:37:29,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 135 [2021-11-20 07:37:29,307 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-20 07:37:29,308 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 140 treesize of output 104 [2021-11-20 07:37:29,534 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 23 treesize of output 11 [2021-11-20 07:37:29,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,585 INFO L354 Elim1Store]: treesize reduction 124, result has 20.5 percent of original size [2021-11-20 07:37:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 119 [2021-11-20 07:37:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:29,625 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-20 07:37:29,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 106 [2021-11-20 07:37:29,974 INFO L354 Elim1Store]: treesize reduction 287, result has 10.3 percent of original size [2021-11-20 07:37:29,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 277 treesize of output 211 [2021-11-20 07:37:30,034 INFO L354 Elim1Store]: treesize reduction 251, result has 11.6 percent of original size [2021-11-20 07:37:30,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 258 treesize of output 195 [2021-11-20 07:37:30,040 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 187 treesize of output 163 [2021-11-20 07:37:31,010 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-11-20 07:37:31,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 174 treesize of output 116 [2021-11-20 07:37:31,039 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-20 07:37:31,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 63 [2021-11-20 07:37:31,246 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 [2021-11-20 07:37:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:37:31,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:37:31,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859129065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:31,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:37:31,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [38] total 71 [2021-11-20 07:37:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323124826] [2021-11-20 07:37:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:31,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 07:37:31,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 07:37:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4751, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 07:37:31,328 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 33 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:37:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:34,293 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-11-20 07:37:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 07:37:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 33 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-11-20 07:37:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:34,294 INFO L225 Difference]: With dead ends: 84 [2021-11-20 07:37:34,294 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 07:37:34,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=365, Invalid=7291, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 07:37:34,297 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:34,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 964 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 943 Invalid, 0 Unknown, 91 Unchecked, 1.0s Time] [2021-11-20 07:37:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 07:37:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-20 07:37:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.28125) internal successors, (82), 78 states have internal predecessors, (82), 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) [2021-11-20 07:37:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-20 07:37:34,301 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 60 [2021-11-20 07:37:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:34,302 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-20 07:37:34,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 33 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:37:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-20 07:37:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:37:34,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:34,303 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, 1, 1, 1, 1, 1] [2021-11-20 07:37:34,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:34,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:34,523 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:37:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1111081205, now seen corresponding path program 1 times [2021-11-20 07:37:34,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:34,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429608525] [2021-11-20 07:37:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:34,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:37:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:36,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:37:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:37:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:37:36,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429608525] [2021-11-20 07:37:36,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429608525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149262407] [2021-11-20 07:37:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:36,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:36,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:36,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:36,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:37:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-20 07:37:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:37,009 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 [2021-11-20 07:37:37,083 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 [2021-11-20 07:37:37,262 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:37:37,263 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 [2021-11-20 07:37:37,976 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 23 treesize of output 19 [2021-11-20 07:37:38,266 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 07:37:38,266 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 57 treesize of output 24 [2021-11-20 07:37:38,271 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:37:38,271 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 14 treesize of output 10 [2021-11-20 07:37:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:38,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:38,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:38,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:38,998 INFO L354 Elim1Store]: treesize reduction 202, result has 6.0 percent of original size [2021-11-20 07:37:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 91 [2021-11-20 07:37:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:39,007 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 104 treesize of output 92 [2021-11-20 07:37:39,024 INFO L354 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2021-11-20 07:37:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 95 [2021-11-20 07:37:40,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,440 INFO L354 Elim1Store]: treesize reduction 99, result has 11.6 percent of original size [2021-11-20 07:37:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 101 [2021-11-20 07:37:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2021-11-20 07:37:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:37:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,694 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-20 07:37:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,911 INFO L354 Elim1Store]: treesize reduction 184, result has 18.2 percent of original size [2021-11-20 07:37:40,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 150 treesize of output 121 [2021-11-20 07:37:40,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:40,953 INFO L354 Elim1Store]: treesize reduction 102, result has 19.0 percent of original size [2021-11-20 07:37:40,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 130 treesize of output 126 [2021-11-20 07:37:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:41,169 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-20 07:37:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 122 [2021-11-20 07:37:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:37:41,191 INFO L354 Elim1Store]: treesize reduction 99, result has 11.6 percent of original size [2021-11-20 07:37:41,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 111 treesize of output 106 [2021-11-20 07:37:41,453 INFO L354 Elim1Store]: treesize reduction 256, result has 11.4 percent of original size [2021-11-20 07:37:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 263 treesize of output 209 [2021-11-20 07:37:41,483 INFO L354 Elim1Store]: treesize reduction 140, result has 9.7 percent of original size [2021-11-20 07:37:41,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 184 treesize of output 121 [2021-11-20 07:37:41,703 INFO L354 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2021-11-20 07:37:41,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 205 treesize of output 147 [2021-11-20 07:37:42,139 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-20 07:37:42,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 46 [2021-11-20 07:37:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:44,292 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (= (select |c_#valid| (let ((.cse2 (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4))) (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse2 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse2 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) 1)) is different from false [2021-11-20 07:38:46,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset| Int)) (= (select |c_#valid| (let ((.cse2 (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) (.cse5 (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))) (select (let ((.cse0 (let ((.cse1 (let ((.cse3 (let ((.cse4 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|))))) (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) .cse5 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse3 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse2 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse7 (let ((.cse8 (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))))) (store .cse9 |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) .cse5 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse2 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) 1)) is different from false [2021-11-20 07:40:19,254 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset| Int)) (= (select |c_#valid| (let ((.cse8 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) (.cse5 (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse6 (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))) (select (let ((.cse0 (let ((.cse1 (let ((.cse3 (let ((.cse4 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse5))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse3 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse2 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse9 (let ((.cse10 (let ((.cse11 (let ((.cse12 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))))) (store .cse11 .cse5 (store (select .cse11 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse9 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse2 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) 1)) is different from false [2021-11-20 07:40:19,397 INFO L354 Elim1Store]: treesize reduction 5, result has 99.5 percent of original size [2021-11-20 07:40:19,398 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 1042 treesize of output 1041 [2021-11-20 07:41:36,208 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset| Int)) (let ((.cse9 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse6 (select .cse9 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (= (let ((.cse14 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (+ 4 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse6) (+ 4 (select .cse14 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)))) (.cse7 (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))) (select (let ((.cse0 (let ((.cse1 (let ((.cse4 (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse9 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|)))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| .cse6))))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|))))) (store .cse4 .cse3 (store (select .cse4 .cse3) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|))))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) .cse2 .cse3))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse10 (let ((.cse11 (let ((.cse12 (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse14 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)))) (store .cse13 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))))) (store .cse12 .cse6 (store (select .cse12 .cse6) .cse7 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|))))) (store .cse11 .cse3 (store (select .cse11 .cse3) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|))))) (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) .cse2 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) .cse6)))) is different from false [2021-11-20 07:41:39,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149262407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:41:39,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:41:39,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 39] total 66 [2021-11-20 07:41:39,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347908759] [2021-11-20 07:41:39,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:41:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-20 07:41:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:41:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-20 07:41:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=5225, Unknown=89, NotChecked=596, Total=6162 [2021-11-20 07:41:39,104 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 67 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 59 states have internal predecessors, (111), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:41:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:41:48,042 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-11-20 07:41:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 07:41:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 59 states have internal predecessors, (111), 5 states have call successors, (6), 4 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 64 [2021-11-20 07:41:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:41:48,044 INFO L225 Difference]: With dead ends: 120 [2021-11-20 07:41:48,044 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 07:41:48,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 247.6s TimeCoverageRelationStatistics Valid=513, Invalid=9314, Unknown=89, NotChecked=796, Total=10712 [2021-11-20 07:41:48,048 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:41:48,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1160 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1901 Invalid, 0 Unknown, 207 Unchecked, 2.0s Time] [2021-11-20 07:41:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 07:41:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2021-11-20 07:41:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 82 states have internal predecessors, (88), 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) [2021-11-20 07:41:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-11-20 07:41:48,052 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 64 [2021-11-20 07:41:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:41:48,053 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-11-20 07:41:48,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 59 states have internal predecessors, (111), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:41:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-11-20 07:41:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:41:48,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:41:48,054 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, 1, 1, 1, 1, 1] [2021-11-20 07:41:48,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:41:48,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:41:48,279 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:41:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:41:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1111081206, now seen corresponding path program 1 times [2021-11-20 07:41:48,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:41:48,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518907463] [2021-11-20 07:41:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:41:48,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:41:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:50,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:41:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:51,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:41:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:51,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:41:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:41:52,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:41:52,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518907463] [2021-11-20 07:41:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518907463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:41:52,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483038989] [2021-11-20 07:41:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:41:52,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:41:52,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:41:52,403 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:41:52,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:41:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-20 07:41:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:41:52,513 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 [2021-11-20 07:41:52,517 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 [2021-11-20 07:41:52,532 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 16 treesize of output 14 [2021-11-20 07:41:52,535 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 [2021-11-20 07:41:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:52,815 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 [2021-11-20 07:41:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:52,834 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 [2021-11-20 07:41:53,061 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:41:53,061 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 [2021-11-20 07:41:53,065 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:41:53,066 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 15 [2021-11-20 07:41:53,301 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:41:53,301 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 3 case distinctions, treesize of input 35 treesize of output 40 [2021-11-20 07:41:53,312 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 07:41:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 32 [2021-11-20 07:41:53,991 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 [2021-11-20 07:41:54,453 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 63 treesize of output 47 [2021-11-20 07:41:54,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-11-20 07:41:54,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:41:54,463 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 42 treesize of output 34 [2021-11-20 07:41:54,474 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 07:41:54,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-11-20 07:41:55,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 105 [2021-11-20 07:41:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:41:55,344 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:41:55,344 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 2 case distinctions, treesize of input 114 treesize of output 109 [2021-11-20 07:41:55,360 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:41:55,360 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 103 treesize of output 103 [2021-11-20 07:41:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:55,385 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 07:41:55,385 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 5 case distinctions, treesize of input 97 treesize of output 105 [2021-11-20 07:41:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 99 [2021-11-20 07:41:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:56,978 INFO L354 Elim1Store]: treesize reduction 81, result has 3.6 percent of original size [2021-11-20 07:41:56,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 90 treesize of output 85 [2021-11-20 07:41:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-11-20 07:41:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,221 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-20 07:41:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,423 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:41:57,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2021-11-20 07:41:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,439 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-20 07:41:57,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 94 treesize of output 87 [2021-11-20 07:41:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,668 INFO L354 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2021-11-20 07:41:57,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 97 treesize of output 105 [2021-11-20 07:41:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:41:57,697 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 07:41:57,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 96 [2021-11-20 07:41:58,024 INFO L354 Elim1Store]: treesize reduction 259, result has 11.3 percent of original size [2021-11-20 07:41:58,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 198 treesize of output 153 [2021-11-20 07:41:58,074 INFO L354 Elim1Store]: treesize reduction 223, result has 12.9 percent of original size [2021-11-20 07:41:58,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 218 treesize of output 187 [2021-11-20 07:42:00,388 INFO L354 Elim1Store]: treesize reduction 195, result has 5.8 percent of original size [2021-11-20 07:42:00,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 248 treesize of output 140 [2021-11-20 07:42:00,404 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-11-20 07:42:00,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 74 [2021-11-20 07:42:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:42:00,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:35,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483038989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:35,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:35,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 40] total 73 [2021-11-20 07:42:35,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929118375] [2021-11-20 07:42:35,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:35,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-20 07:42:35,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:35,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-20 07:42:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=8321, Unknown=6, NotChecked=0, Total=8742 [2021-11-20 07:42:35,463 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 74 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 66 states have internal predecessors, (114), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:42:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:41,962 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-11-20 07:42:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:42:41,962 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 66 states have internal predecessors, (114), 5 states have call successors, (6), 3 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 64 [2021-11-20 07:42:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:41,963 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:42:41,963 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 07:42:41,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3558 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=569, Invalid=10554, Unknown=7, NotChecked=0, Total=11130 [2021-11-20 07:42:41,964 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:41,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1334 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1289 Invalid, 0 Unknown, 244 Unchecked, 1.4s Time] [2021-11-20 07:42:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 07:42:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 07:42:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 82 states have internal predecessors, (87), 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) [2021-11-20 07:42:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-11-20 07:42:41,968 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 64 [2021-11-20 07:42:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-11-20 07:42:41,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 66 states have internal predecessors, (114), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:42:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-11-20 07:42:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:42:41,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:41,970 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, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:42,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 07:42:42,194 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-11-20 07:42:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 83778008, now seen corresponding path program 1 times [2021-11-20 07:42:42,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451845943] [2021-11-20 07:42:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:42,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:44,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:42:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:44,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:42:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:44,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 07:42:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:42:46,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451845943] [2021-11-20 07:42:46,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451845943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701297947] [2021-11-20 07:42:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:46,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:46,107 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:46,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83988633-ab4c-4646-8b5e-4b3a8a6c5518/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:42:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:46,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-20 07:42:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:46,212 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 [2021-11-20 07:42:46,281 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 [2021-11-20 07:42:46,506 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:42:46,506 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 [2021-11-20 07:42:46,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:42:46,711 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 14 [2021-11-20 07:42:46,893 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-20 07:42:46,893 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 16 treesize of output 18 [2021-11-20 07:42:47,507 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 27 treesize of output 23 [2021-11-20 07:42:47,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:42:47,900 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 69 treesize of output 36 [2021-11-20 07:42:47,906 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:42:47,906 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 33 treesize of output 29 [2021-11-20 07:42:47,912 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 11 treesize of output 7 [2021-11-20 07:43:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:00,794 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-20 07:43:00,794 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 125 treesize of output 95 [2021-11-20 07:43:00,828 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:43:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 116 [2021-11-20 07:43:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:00,853 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-20 07:43:00,853 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 2 case distinctions, treesize of input 107 treesize of output 99 [2021-11-20 07:43:02,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:02,642 INFO L354 Elim1Store]: treesize reduction 149, result has 8.0 percent of original size [2021-11-20 07:43:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 149 treesize of output 120 [2021-11-20 07:43:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:02,650 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 07:43:02,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 110 treesize of output 100 [2021-11-20 07:43:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:02,903 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-11-20 07:43:02,903 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 105 [2021-11-20 07:43:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:02,933 INFO L354 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2021-11-20 07:43:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 96 treesize of output 102 [2021-11-20 07:43:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:03,287 INFO L354 Elim1Store]: treesize reduction 144, result has 14.3 percent of original size [2021-11-20 07:43:03,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 116 [2021-11-20 07:43:03,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:03,323 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-11-20 07:43:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 122 [2021-11-20 07:43:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:03,666 INFO L354 Elim1Store]: treesize reduction 115, result has 8.7 percent of original size [2021-11-20 07:43:03,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 132 treesize of output 143 [2021-11-20 07:43:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:03,697 INFO L354 Elim1Store]: treesize reduction 91, result has 7.1 percent of original size [2021-11-20 07:43:03,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 126 [2021-11-20 07:43:04,137 INFO L354 Elim1Store]: treesize reduction 378, result has 15.1 percent of original size [2021-11-20 07:43:04,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 273 treesize of output 207 [2021-11-20 07:43:04,277 INFO L354 Elim1Store]: treesize reduction 354, result has 15.9 percent of original size [2021-11-20 07:43:04,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 342 treesize of output 306 [2021-11-20 07:43:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:43:04,800 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-11-20 07:43:04,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 357 treesize of output 170 [2021-11-20 07:43:05,826 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-11-20 07:43:05,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 150 treesize of output 47 [2021-11-20 07:43:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:43:05,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:08,403 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (not (let ((.cse3 (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4))) (let ((.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse0 .cse1) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse1)))))) is different from false [2021-11-20 07:45:40,443 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (not (let ((.cse3 (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) (.cse6 (+ |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.offset| 4))) (let ((.cse1 (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base|))))) (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base|) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse9 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|))))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (let ((.cse2 (let ((.cse4 (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.offset|))))) (store .cse5 |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base|) .cse6 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2021-11-20 07:45:42,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (not (let ((.cse10 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse15 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|)) (.cse9 (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (let ((.cse3 (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) (.cse7 (+ 4 .cse9)) (.cse6 (select .cse15 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (let ((.cse1 (let ((.cse11 (let ((.cse12 (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse15 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse14 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse14 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse6))))) (store .cse13 .cse6 (store (select .cse13 .cse6) .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|))))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (let ((.cse2 (let ((.cse4 (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse9))))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))))) is different from false [2021-11-20 07:45:44,543 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (not (let ((.cse10 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse15 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|)) (.cse9 (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (let ((.cse3 (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) (.cse7 (+ 4 .cse9)) (.cse6 (select .cse15 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (let ((.cse0 (let ((.cse11 (let ((.cse12 (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse15 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse14 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse14 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse6))))) (store .cse13 .cse6 (store (select .cse13 .cse6) .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse0 .cse1) (select (select (let ((.cse2 (let ((.cse4 (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse9))))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse1)))))))) is different from false [2021-11-20 07:45:46,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| Int) (|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (not (let ((.cse11 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse16 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|)) (.cse10 (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (let ((.cse3 (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) (.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_#t~mem11#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_#t~mem11#1.offset| 4))) (.cse8 (+ 4 .cse10)) (.cse7 (select .cse16 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (let ((.cse1 (let ((.cse12 (let ((.cse13 (let ((.cse14 (let ((.cse15 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse16 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse15 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse15 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse7))))) (store .cse14 .cse7 (store (select .cse14 .cse7) .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse13 .cse5 (store (select .cse13 .cse5) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 .cse5))))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (let ((.cse2 (let ((.cse4 (let ((.cse6 (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse9 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse10))))) (store .cse6 .cse7 (store (select .cse6 .cse7) .cse8 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse4 .cse5 (store (select .cse4 .cse5) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse3 |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))))) is different from false [2021-11-20 07:48:25,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701297947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:48:25,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:48:25,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 41] total 77 [2021-11-20 07:48:25,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767513584] [2021-11-20 07:48:25,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:48:25,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 07:48:25,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:48:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 07:48:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=7092, Unknown=142, NotChecked=870, Total=8372 [2021-11-20 07:48:25,894 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 77 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 69 states have internal predecessors, (114), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)