./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:42:50,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:42:50,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:42:50,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:42:50,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:42:50,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:42:50,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:42:50,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:42:50,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:42:50,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:42:50,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:42:50,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:42:50,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:42:50,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:42:50,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:42:50,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:42:50,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:42:50,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:42:50,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:42:50,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:42:50,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:42:50,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:42:50,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:42:50,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:42:50,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:42:50,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:42:50,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:42:50,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:42:50,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:42:50,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:42:50,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:42:50,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:42:50,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:42:50,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:42:50,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:42:50,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:42:50,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:42:50,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:42:50,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:42:50,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:42:50,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:42:50,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:42:50,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:42:50,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:42:50,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:42:50,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:42:50,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:42:50,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:42:50,317 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:42:50,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:42:50,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:42:50,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:42:50,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:42:50,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:42:50,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:42:50,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:42:50,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:42:50,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:42:50,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:42:50,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:42:50,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:42:50,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:42:50,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:42:50,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:42:50,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:42:50,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:42:50,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:42:50,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:42:50,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:42:50,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:42:50,322 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:42:50,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:42:50,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:42:50,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:42:50,323 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_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 [2021-10-21 19:42:50,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:42:50,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:42:50,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:42:50,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:42:50,626 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:42:50,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-10-21 19:42:50,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/data/2f1d31032/6c44d82a8d534cd8b7cf1f95abca89b5/FLAGd9c1428fe [2021-10-21 19:42:51,212 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:42:51,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/sv-benchmarks/c/loop-lit/gr2006.i [2021-10-21 19:42:51,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/data/2f1d31032/6c44d82a8d534cd8b7cf1f95abca89b5/FLAGd9c1428fe [2021-10-21 19:42:51,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/data/2f1d31032/6c44d82a8d534cd8b7cf1f95abca89b5 [2021-10-21 19:42:51,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:42:51,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:42:51,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:42:51,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:42:51,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:42:51,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0ece8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51, skipping insertion in model container [2021-10-21 19:42:51,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:42:51,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:42:51,782 WARN L228 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_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-21 19:42:51,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:42:51,830 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:42:51,844 WARN L228 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_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-21 19:42:51,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:42:51,864 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:42:51,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51 WrapperNode [2021-10-21 19:42:51,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:42:51,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:42:51,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:42:51,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:42:51,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:42:51,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:42:51,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:42:51,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:42:51,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:42:51,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:42:51,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:42:51,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:42:51,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (1/1) ... [2021-10-21 19:42:51,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:42:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:51,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:42:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:42:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:42:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:42:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:42:52,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:42:52,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:42:52,255 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 19:42:52,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:52 BoogieIcfgContainer [2021-10-21 19:42:52,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:42:52,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:42:52,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:42:52,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:42:52,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:42:51" (1/3) ... [2021-10-21 19:42:52,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765cec17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:42:52, skipping insertion in model container [2021-10-21 19:42:52,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:51" (2/3) ... [2021-10-21 19:42:52,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765cec17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:42:52, skipping insertion in model container [2021-10-21 19:42:52,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:52" (3/3) ... [2021-10-21 19:42:52,268 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-10-21 19:42:52,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:42:52,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:42:52,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:42:52,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:42:52,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:42:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:42:52,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:52,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:42:52,357 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-10-21 19:42:52,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:52,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120734388] [2021-10-21 19:42:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:52,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:52,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:52,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120734388] [2021-10-21 19:42:52,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120734388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:52,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:52,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:42:52,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129248944] [2021-10-21 19:42:52,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:42:52,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:42:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:42:52,573 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:52,585 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-10-21 19:42:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:42:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:42:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:52,608 INFO L225 Difference]: With dead ends: 21 [2021-10-21 19:42:52,608 INFO L226 Difference]: Without dead ends: 9 [2021-10-21 19:42:52,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:42:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-21 19:42:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-21 19:42:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-21 19:42:52,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-21 19:42:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:52,639 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-21 19:42:52,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-21 19:42:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:42:52,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:52,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:52,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:42:52,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-10-21 19:42:52,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:52,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153847746] [2021-10-21 19:42:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:52,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:52,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153847746] [2021-10-21 19:42:52,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153847746] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:52,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:52,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:42:52,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454809671] [2021-10-21 19:42:52,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:42:52,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:42:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:42:52,704 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:52,777 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-21 19:42:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:42:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 19:42:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:52,780 INFO L225 Difference]: With dead ends: 23 [2021-10-21 19:42:52,780 INFO L226 Difference]: Without dead ends: 16 [2021-10-21 19:42:52,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:42:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-21 19:42:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-21 19:42:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-21 19:42:52,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-10-21 19:42:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:52,785 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-21 19:42:52,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-21 19:42:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:42:52,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:52,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:52,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:42:52,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-10-21 19:42:52,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:52,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462553777] [2021-10-21 19:42:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:52,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:52,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:52,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462553777] [2021-10-21 19:42:52,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462553777] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:52,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:52,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:42:52,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597013072] [2021-10-21 19:42:52,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:42:52,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:42:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:42:52,890 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:52,913 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-21 19:42:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:42:52,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 19:42:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:52,914 INFO L225 Difference]: With dead ends: 18 [2021-10-21 19:42:52,915 INFO L226 Difference]: Without dead ends: 14 [2021-10-21 19:42:52,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:42:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-21 19:42:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-21 19:42:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-21 19:42:52,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-10-21 19:42:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:52,919 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 19:42:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-21 19:42:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:42:52,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:52,921 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:52,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:42:52,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:52,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1661002755, now seen corresponding path program 1 times [2021-10-21 19:42:52,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:52,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772902268] [2021-10-21 19:42:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:52,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:52,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:52,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772902268] [2021-10-21 19:42:52,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772902268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:52,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251312255] [2021-10-21 19:42:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:52,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:52,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:52,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:52,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:42:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:42:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:53,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251312255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:53,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:53,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 19:42:53,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349153614] [2021-10-21 19:42:53,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:42:53,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:42:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:53,094 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:53,129 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-10-21 19:42:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:42:53,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-21 19:42:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:53,131 INFO L225 Difference]: With dead ends: 25 [2021-10-21 19:42:53,131 INFO L226 Difference]: Without dead ends: 18 [2021-10-21 19:42:53,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-21 19:42:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-21 19:42:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-21 19:42:53,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-10-21 19:42:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:53,140 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-21 19:42:53,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-21 19:42:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:42:53,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:53,142 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:53,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:53,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:53,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1527752176, now seen corresponding path program 2 times [2021-10-21 19:42:53,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:53,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297728448] [2021-10-21 19:42:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:53,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:53,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297728448] [2021-10-21 19:42:53,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297728448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:53,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896431286] [2021-10-21 19:42:53,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:42:53,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:53,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:53,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:42:53,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:42:53,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:53,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:42:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:42:53,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896431286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:53,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:53,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 19:42:53,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599118609] [2021-10-21 19:42:53,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:42:53,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:42:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:42:53,570 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:53,673 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-10-21 19:42:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:42:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-21 19:42:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:53,676 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:42:53,677 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:42:53,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:42:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:42:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-10-21 19:42:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-21 19:42:53,688 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-10-21 19:42:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:53,691 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-21 19:42:53,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-21 19:42:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:42:53,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:53,694 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:53,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:53,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:53,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash -54480515, now seen corresponding path program 3 times [2021-10-21 19:42:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:53,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524255207] [2021-10-21 19:42:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:53,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:42:53,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:53,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524255207] [2021-10-21 19:42:53,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524255207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:53,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900292507] [2021-10-21 19:42:53,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:42:53,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:53,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:54,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:42:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:42:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:54,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:42:54,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:42:54,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900292507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:54,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:54,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 19:42:54,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676107363] [2021-10-21 19:42:54,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:42:54,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:42:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:42:54,179 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:54,266 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-10-21 19:42:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:42:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 19:42:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:54,268 INFO L225 Difference]: With dead ends: 52 [2021-10-21 19:42:54,268 INFO L226 Difference]: Without dead ends: 38 [2021-10-21 19:42:54,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:42:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-21 19:42:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-10-21 19:42:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-21 19:42:54,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2021-10-21 19:42:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:54,275 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-21 19:42:54,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-21 19:42:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:42:54,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:54,277 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:54,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:54,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:42:54,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -125277221, now seen corresponding path program 4 times [2021-10-21 19:42:54,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:54,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679584440] [2021-10-21 19:42:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:54,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:54,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:54,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679584440] [2021-10-21 19:42:54,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679584440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:54,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781909577] [2021-10-21 19:42:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:42:54,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:54,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:54,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:54,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:42:54,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:42:54,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:42:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:54,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781909577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:54,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:54,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 19:42:54,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986373853] [2021-10-21 19:42:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:42:54,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:42:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:42:54,819 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:54,846 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-10-21 19:42:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:42:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-21 19:42:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:54,848 INFO L225 Difference]: With dead ends: 51 [2021-10-21 19:42:54,848 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:42:54,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:42:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:42:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-10-21 19:42:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-21 19:42:54,854 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 29 [2021-10-21 19:42:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:54,854 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-21 19:42:54,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-21 19:42:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:42:54,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:54,856 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:54,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:55,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:55,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1180467442, now seen corresponding path program 5 times [2021-10-21 19:42:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:55,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402468794] [2021-10-21 19:42:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:55,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:55,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:55,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402468794] [2021-10-21 19:42:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402468794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:55,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786877100] [2021-10-21 19:42:55,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:42:55,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:55,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:55,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:55,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:42:55,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-21 19:42:55,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:42:55,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786877100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:55,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 19:42:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620158307] [2021-10-21 19:42:55,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:42:55,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:42:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:42:55,359 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:55,389 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-10-21 19:42:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:42:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 19:42:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:55,392 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:42:55,392 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:42:55,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:42:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:42:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-10-21 19:42:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-10-21 19:42:55,404 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-10-21 19:42:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:55,405 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-10-21 19:42:55,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-10-21 19:42:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:42:55,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:55,407 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:55,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:55,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:55,631 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1486701829, now seen corresponding path program 6 times [2021-10-21 19:42:55,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:55,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426175505] [2021-10-21 19:42:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:55,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:55,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:55,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426175505] [2021-10-21 19:42:55,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426175505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:55,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128527850] [2021-10-21 19:42:55,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:42:55,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:55,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:55,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:55,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:42:55,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-21 19:42:55,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:55,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:42:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:55,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128527850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:55,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:55,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-21 19:42:55,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356489038] [2021-10-21 19:42:55,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:42:55,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:42:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:42:55,981 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:56,115 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-10-21 19:42:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:42:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-21 19:42:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:56,118 INFO L225 Difference]: With dead ends: 70 [2021-10-21 19:42:56,119 INFO L226 Difference]: Without dead ends: 53 [2021-10-21 19:42:56,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:42:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-21 19:42:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2021-10-21 19:42:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-21 19:42:56,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 35 [2021-10-21 19:42:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:56,138 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-21 19:42:56,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-21 19:42:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 19:42:56,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:56,140 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:56,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:56,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:56,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1793004003, now seen corresponding path program 7 times [2021-10-21 19:42:56,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:56,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043663638] [2021-10-21 19:42:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:56,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:56,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:56,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043663638] [2021-10-21 19:42:56,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043663638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:56,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575117329] [2021-10-21 19:42:56,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:42:56,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:56,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:56,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:56,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:42:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:42:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:56,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575117329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:56,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:56,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-21 19:42:56,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805593448] [2021-10-21 19:42:56,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:42:56,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:42:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:42:56,708 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:56,758 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-10-21 19:42:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:42:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-21 19:42:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:56,760 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:42:56,760 INFO L226 Difference]: Without dead ends: 46 [2021-10-21 19:42:56,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:42:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-21 19:42:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-10-21 19:42:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-21 19:42:56,777 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2021-10-21 19:42:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:56,777 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-21 19:42:56,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-21 19:42:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:42:56,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:56,779 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:56,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:56,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:57,000 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:57,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1018049328, now seen corresponding path program 8 times [2021-10-21 19:42:57,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:57,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551840777] [2021-10-21 19:42:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:57,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:57,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:57,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551840777] [2021-10-21 19:42:57,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551840777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:57,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372892064] [2021-10-21 19:42:57,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:42:57,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:57,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:42:57,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:42:57,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:57,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:42:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:57,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372892064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:57,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:57,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 19:42:57,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852615406] [2021-10-21 19:42:57,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:42:57,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:42:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:42:57,362 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:57,396 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-10-21 19:42:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:42:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-21 19:42:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:57,400 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:42:57,400 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:42:57,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:42:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:42:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-21 19:42:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 19:42:57,410 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2021-10-21 19:42:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:57,411 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 19:42:57,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 19:42:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:42:57,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:57,413 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:57,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:57,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:57,627 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash 207457597, now seen corresponding path program 9 times [2021-10-21 19:42:57,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:57,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500058397] [2021-10-21 19:42:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:57,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:57,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:57,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500058397] [2021-10-21 19:42:57,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500058397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:57,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666990517] [2021-10-21 19:42:57,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:42:57,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:57,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:57,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:57,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:42:57,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-10-21 19:42:57,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:57,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:42:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 13 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:58,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666990517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:58,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:58,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 17 [2021-10-21 19:42:58,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46424727] [2021-10-21 19:42:58,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:42:58,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:42:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:42:58,141 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:58,190 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-10-21 19:42:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:42:58,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-21 19:42:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:58,192 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:42:58,192 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 19:42:58,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:42:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 19:42:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-10-21 19:42:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-21 19:42:58,206 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 47 [2021-10-21 19:42:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:58,206 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-21 19:42:58,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-21 19:42:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:42:58,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:58,209 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 14, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:58,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:58,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:42:58,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:58,423 INFO L82 PathProgramCache]: Analyzing trace with hash 32308080, now seen corresponding path program 10 times [2021-10-21 19:42:58,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:58,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156667780] [2021-10-21 19:42:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:58,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:58,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:58,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156667780] [2021-10-21 19:42:58,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156667780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:58,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974266164] [2021-10-21 19:42:58,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:42:58,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:58,597 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:58,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:42:58,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:42:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:42:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974266164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:58,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:58,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-21 19:42:58,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728677478] [2021-10-21 19:42:58,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:42:58,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:42:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:42:58,907 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:58,954 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-10-21 19:42:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:42:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-10-21 19:42:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:58,955 INFO L225 Difference]: With dead ends: 87 [2021-10-21 19:42:58,955 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:42:58,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:42:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:42:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-10-21 19:42:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-10-21 19:42:58,961 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 62 [2021-10-21 19:42:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:58,961 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-10-21 19:42:58,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-10-21 19:42:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 19:42:58,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:58,962 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 15, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:58,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:59,183 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1726719331, now seen corresponding path program 11 times [2021-10-21 19:42:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:59,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218481493] [2021-10-21 19:42:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:59,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:59,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:59,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218481493] [2021-10-21 19:42:59,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218481493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:59,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414757578] [2021-10-21 19:42:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:42:59,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:59,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:59,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:42:59,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-21 19:42:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:42:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414757578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:59,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:59,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-21 19:42:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920311509] [2021-10-21 19:42:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:42:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:42:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:42:59,721 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:59,765 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-10-21 19:42:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:42:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-10-21 19:42:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:59,767 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:42:59,767 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 19:42:59,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:42:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 19:42:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-10-21 19:42:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-10-21 19:42:59,772 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2021-10-21 19:42:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:59,772 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-10-21 19:42:59,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-10-21 19:42:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-21 19:42:59,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:59,774 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 16, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:59,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:59,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:42:59,998 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2016341936, now seen corresponding path program 12 times [2021-10-21 19:42:59,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:59,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649750010] [2021-10-21 19:42:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:59,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 216 proven. 392 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:43:00,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:00,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649750010] [2021-10-21 19:43:00,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649750010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:00,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143239632] [2021-10-21 19:43:00,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:43:00,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:00,231 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:00,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:43:00,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-10-21 19:43:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:43:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 560 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:43:00,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143239632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:00,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:00,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-21 19:43:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450153031] [2021-10-21 19:43:00,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 19:43:00,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 19:43:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:43:00,918 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:01,421 INFO L93 Difference]: Finished difference Result 285 states and 368 transitions. [2021-10-21 19:43:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-21 19:43:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-21 19:43:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:01,423 INFO L225 Difference]: With dead ends: 285 [2021-10-21 19:43:01,423 INFO L226 Difference]: Without dead ends: 265 [2021-10-21 19:43:01,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=1049, Invalid=3643, Unknown=0, NotChecked=0, Total=4692 [2021-10-21 19:43:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-21 19:43:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 108. [2021-10-21 19:43:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2021-10-21 19:43:01,440 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 68 [2021-10-21 19:43:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:01,440 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2021-10-21 19:43:01,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2021-10-21 19:43:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-21 19:43:01,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:01,441 INFO L512 BasicCegarLoop]: trace histogram [34, 33, 17, 17, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:01,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:01,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:43:01,642 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1230960643, now seen corresponding path program 13 times [2021-10-21 19:43:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:01,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780803440] [2021-10-21 19:43:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:01,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-21 19:43:01,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:01,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780803440] [2021-10-21 19:43:01,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780803440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:01,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172414936] [2021-10-21 19:43:01,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:43:01,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:01,878 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:01,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:43:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:43:02,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-21 19:43:02,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172414936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:02,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:02,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-21 19:43:02,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296725004] [2021-10-21 19:43:02,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:43:02,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:02,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:43:02,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:43:02,309 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:02,357 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-10-21 19:43:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:43:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-10-21 19:43:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:02,359 INFO L225 Difference]: With dead ends: 168 [2021-10-21 19:43:02,359 INFO L226 Difference]: Without dead ends: 112 [2021-10-21 19:43:02,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:43:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-21 19:43:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-10-21 19:43:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-10-21 19:43:02,368 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 107 [2021-10-21 19:43:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:02,368 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-10-21 19:43:02,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-10-21 19:43:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-21 19:43:02,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:02,370 INFO L512 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:02,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:02,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:43:02,586 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash 174845424, now seen corresponding path program 14 times [2021-10-21 19:43:02,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:02,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109866104] [2021-10-21 19:43:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:02,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-21 19:43:02,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:02,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109866104] [2021-10-21 19:43:02,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109866104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:02,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839101374] [2021-10-21 19:43:02,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:02,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:02,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:43:03,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:43:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-21 19:43:03,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839101374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:03,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:03,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-21 19:43:03,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736560265] [2021-10-21 19:43:03,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:43:03,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:43:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:43:03,319 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:03,378 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2021-10-21 19:43:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:43:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-10-21 19:43:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:03,380 INFO L225 Difference]: With dead ends: 171 [2021-10-21 19:43:03,380 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 19:43:03,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:43:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 19:43:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-21 19:43:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-10-21 19:43:03,388 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 110 [2021-10-21 19:43:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:03,389 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-10-21 19:43:03,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-10-21 19:43:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-21 19:43:03,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:03,391 INFO L512 BasicCegarLoop]: trace histogram [36, 35, 19, 17, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:03,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:03,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:43:03,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash 317284125, now seen corresponding path program 15 times [2021-10-21 19:43:03,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:03,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045441377] [2021-10-21 19:43:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:03,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 963 proven. 551 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-21 19:43:03,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:03,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045441377] [2021-10-21 19:43:03,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045441377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:03,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613659111] [2021-10-21 19:43:03,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:43:03,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:03,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:03,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:03,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:43:04,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-10-21 19:43:04,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:43:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1040 proven. 801 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:43:04,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613659111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:04,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:04,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-10-21 19:43:04,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461574440] [2021-10-21 19:43:04,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 19:43:04,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 19:43:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:43:04,836 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:05,434 INFO L93 Difference]: Finished difference Result 330 states and 419 transitions. [2021-10-21 19:43:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-21 19:43:05,435 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-21 19:43:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:05,437 INFO L225 Difference]: With dead ends: 330 [2021-10-21 19:43:05,437 INFO L226 Difference]: Without dead ends: 274 [2021-10-21 19:43:05,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 888.1ms TimeCoverageRelationStatistics Valid=1415, Invalid=5065, Unknown=0, NotChecked=0, Total=6480 [2021-10-21 19:43:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-21 19:43:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 126. [2021-10-21 19:43:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.168) internal successors, (146), 125 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-10-21 19:43:05,453 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 113 [2021-10-21 19:43:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:05,454 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-10-21 19:43:05,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-10-21 19:43:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-21 19:43:05,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:05,457 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 20, 20, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:05,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:05,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:43:05,680 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash -934304805, now seen corresponding path program 16 times [2021-10-21 19:43:05,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:05,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085373228] [2021-10-21 19:43:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:05,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-21 19:43:05,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:05,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085373228] [2021-10-21 19:43:05,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085373228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:05,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229884799] [2021-10-21 19:43:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:43:05,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:05,979 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:06,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:43:06,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:43:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:43:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-21 19:43:06,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229884799] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:06,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:06,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-21 19:43:06,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787969955] [2021-10-21 19:43:06,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:43:06,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:43:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:43:06,615 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:06,685 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2021-10-21 19:43:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:43:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-21 19:43:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:06,687 INFO L225 Difference]: With dead ends: 195 [2021-10-21 19:43:06,687 INFO L226 Difference]: Without dead ends: 130 [2021-10-21 19:43:06,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:43:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-21 19:43:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-10-21 19:43:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1640625) internal successors, (149), 128 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2021-10-21 19:43:06,696 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 125 [2021-10-21 19:43:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:06,697 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2021-10-21 19:43:06,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2021-10-21 19:43:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-21 19:43:06,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:06,699 INFO L512 BasicCegarLoop]: trace histogram [41, 40, 21, 20, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:06,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:06,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:06,926 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:06,927 INFO L82 PathProgramCache]: Analyzing trace with hash 533074702, now seen corresponding path program 17 times [2021-10-21 19:43:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:06,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379363380] [2021-10-21 19:43:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:06,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-21 19:43:07,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:07,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379363380] [2021-10-21 19:43:07,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379363380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:07,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024733623] [2021-10-21 19:43:07,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:43:07,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:07,222 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:07,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:43:07,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-10-21 19:43:07,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:43:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-21 19:43:07,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024733623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:07,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:07,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-21 19:43:07,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292278117] [2021-10-21 19:43:07,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:43:07,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:43:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:43:07,903 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:07,960 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2021-10-21 19:43:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:43:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-10-21 19:43:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:07,962 INFO L225 Difference]: With dead ends: 198 [2021-10-21 19:43:07,962 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 19:43:07,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:43:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 19:43:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-10-21 19:43:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 131 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2021-10-21 19:43:07,972 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 128 [2021-10-21 19:43:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:07,973 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2021-10-21 19:43:07,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2021-10-21 19:43:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-21 19:43:07,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:07,975 INFO L512 BasicCegarLoop]: trace histogram [42, 41, 22, 20, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:08,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:08,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:08,197 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1058829051, now seen corresponding path program 18 times [2021-10-21 19:43:08,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:08,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837738767] [2021-10-21 19:43:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:08,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1314 proven. 737 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-21 19:43:08,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:08,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837738767] [2021-10-21 19:43:08,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837738767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:08,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634498177] [2021-10-21 19:43:08,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:43:08,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:08,509 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:08,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:43:08,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2021-10-21 19:43:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-21 19:43:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1403 proven. 1122 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-21 19:43:09,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634498177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:09,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:09,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-21 19:43:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198877258] [2021-10-21 19:43:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 19:43:09,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 19:43:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:43:09,710 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:10,351 INFO L93 Difference]: Finished difference Result 384 states and 488 transitions. [2021-10-21 19:43:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-21 19:43:10,352 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-10-21 19:43:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:10,354 INFO L225 Difference]: With dead ends: 384 [2021-10-21 19:43:10,355 INFO L226 Difference]: Without dead ends: 319 [2021-10-21 19:43:10,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1021.5ms TimeCoverageRelationStatistics Valid=1835, Invalid=6721, Unknown=0, NotChecked=0, Total=8556 [2021-10-21 19:43:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-21 19:43:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 144. [2021-10-21 19:43:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.167832167832168) internal successors, (167), 143 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2021-10-21 19:43:10,371 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 131 [2021-10-21 19:43:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:10,372 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2021-10-21 19:43:10,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2021-10-21 19:43:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-21 19:43:10,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:10,374 INFO L512 BasicCegarLoop]: trace histogram [46, 45, 23, 23, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:10,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:10,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:43:10,599 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 901437565, now seen corresponding path program 19 times [2021-10-21 19:43:10,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:10,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107094933] [2021-10-21 19:43:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:10,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-21 19:43:10,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:10,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107094933] [2021-10-21 19:43:10,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107094933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:10,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638577606] [2021-10-21 19:43:10,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:43:10,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:10,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:10,953 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:10,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:43:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:43:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-21 19:43:11,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638577606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:11,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:11,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-21 19:43:11,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111461657] [2021-10-21 19:43:11,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:43:11,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:43:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:43:11,662 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:11,728 INFO L93 Difference]: Finished difference Result 222 states and 269 transitions. [2021-10-21 19:43:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:43:11,735 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-10-21 19:43:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:11,736 INFO L225 Difference]: With dead ends: 222 [2021-10-21 19:43:11,736 INFO L226 Difference]: Without dead ends: 148 [2021-10-21 19:43:11,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:43:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-21 19:43:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-10-21 19:43:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 146 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-10-21 19:43:11,748 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 143 [2021-10-21 19:43:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:11,748 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-10-21 19:43:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-10-21 19:43:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-21 19:43:11,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:11,750 INFO L512 BasicCegarLoop]: trace histogram [47, 46, 24, 23, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:11,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:11,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:43:11,974 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1257963280, now seen corresponding path program 20 times [2021-10-21 19:43:11,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:11,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659880806] [2021-10-21 19:43:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:11,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-21 19:43:12,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:12,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659880806] [2021-10-21 19:43:12,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659880806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:12,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292374972] [2021-10-21 19:43:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:12,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:12,367 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:12,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:43:12,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:43:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-21 19:43:13,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292374972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:13,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:13,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-10-21 19:43:13,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042334474] [2021-10-21 19:43:13,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:43:13,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:43:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:43:13,220 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:13,323 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2021-10-21 19:43:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:43:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-10-21 19:43:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:13,326 INFO L225 Difference]: With dead ends: 225 [2021-10-21 19:43:13,326 INFO L226 Difference]: Without dead ends: 151 [2021-10-21 19:43:13,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:43:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-21 19:43:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-10-21 19:43:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 149 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2021-10-21 19:43:13,340 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 146 [2021-10-21 19:43:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:13,340 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2021-10-21 19:43:13,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2021-10-21 19:43:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-10-21 19:43:13,343 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:13,343 INFO L512 BasicCegarLoop]: trace histogram [48, 47, 25, 23, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:13,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:13,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:43:13,556 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1948377187, now seen corresponding path program 21 times [2021-10-21 19:43:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:13,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990620118] [2021-10-21 19:43:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:13,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1719 proven. 950 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-21 19:43:13,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:13,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990620118] [2021-10-21 19:43:13,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990620118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:13,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545675500] [2021-10-21 19:43:13,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:43:13,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:13,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:13,930 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:13,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:43:14,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-10-21 19:43:14,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:43:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1820 proven. 1497 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-10-21 19:43:15,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545675500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:15,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:15,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-10-21 19:43:15,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581004004] [2021-10-21 19:43:15,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-21 19:43:15,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-21 19:43:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:43:15,415 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:16,151 INFO L93 Difference]: Finished difference Result 438 states and 557 transitions. [2021-10-21 19:43:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-21 19:43:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-10-21 19:43:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:16,155 INFO L225 Difference]: With dead ends: 438 [2021-10-21 19:43:16,155 INFO L226 Difference]: Without dead ends: 364 [2021-10-21 19:43:16,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1174.4ms TimeCoverageRelationStatistics Valid=2309, Invalid=8611, Unknown=0, NotChecked=0, Total=10920 [2021-10-21 19:43:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-21 19:43:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 162. [2021-10-21 19:43:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 161 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-10-21 19:43:16,173 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 149 [2021-10-21 19:43:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:16,174 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-10-21 19:43:16,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-10-21 19:43:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-21 19:43:16,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:16,176 INFO L512 BasicCegarLoop]: trace histogram [52, 51, 26, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:16,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:16,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:43:16,402 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:16,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1177477339, now seen corresponding path program 22 times [2021-10-21 19:43:16,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:16,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363760710] [2021-10-21 19:43:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:16,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:16,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:16,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363760710] [2021-10-21 19:43:16,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363760710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:16,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962124829] [2021-10-21 19:43:16,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:43:16,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:16,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:16,762 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:16,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:43:17,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:43:17,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:43:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962124829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:17,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-10-21 19:43:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024161568] [2021-10-21 19:43:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 19:43:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 19:43:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:43:17,610 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:17,677 INFO L93 Difference]: Finished difference Result 249 states and 302 transitions. [2021-10-21 19:43:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:43:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-10-21 19:43:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:17,679 INFO L225 Difference]: With dead ends: 249 [2021-10-21 19:43:17,679 INFO L226 Difference]: Without dead ends: 166 [2021-10-21 19:43:17,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:43:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-21 19:43:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-10-21 19:43:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1646341463414633) internal successors, (191), 164 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-10-21 19:43:17,724 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 161 [2021-10-21 19:43:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:17,725 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-10-21 19:43:17,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-10-21 19:43:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-10-21 19:43:17,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:17,727 INFO L512 BasicCegarLoop]: trace histogram [53, 52, 27, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:17,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:17,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:17,950 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1237906062, now seen corresponding path program 23 times [2021-10-21 19:43:17,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:17,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301156850] [2021-10-21 19:43:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:17,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:18,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:18,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301156850] [2021-10-21 19:43:18,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301156850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:18,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138182538] [2021-10-21 19:43:18,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:43:18,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:18,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:18,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:43:19,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-10-21 19:43:19,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:43:19,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:19,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138182538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:19,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:19,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-10-21 19:43:19,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738021348] [2021-10-21 19:43:19,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:43:19,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:43:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:43:19,419 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:19,491 INFO L93 Difference]: Finished difference Result 252 states and 305 transitions. [2021-10-21 19:43:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:43:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-10-21 19:43:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:19,492 INFO L225 Difference]: With dead ends: 252 [2021-10-21 19:43:19,492 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:43:19,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:43:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:43:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-10-21 19:43:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 167 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2021-10-21 19:43:19,508 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 164 [2021-10-21 19:43:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:19,508 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2021-10-21 19:43:19,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2021-10-21 19:43:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-21 19:43:19,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:19,510 INFO L512 BasicCegarLoop]: trace histogram [54, 53, 28, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:19,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-21 19:43:19,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:19,724 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1878695931, now seen corresponding path program 24 times [2021-10-21 19:43:19,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:19,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441171171] [2021-10-21 19:43:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:19,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:20,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:20,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441171171] [2021-10-21 19:43:20,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441171171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:20,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951562678] [2021-10-21 19:43:20,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:43:20,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:20,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:20,124 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:20,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:43:20,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2021-10-21 19:43:20,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:43:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:21,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951562678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:21,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:21,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-21 19:43:21,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133120718] [2021-10-21 19:43:21,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:43:21,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:21,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:43:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:43:21,129 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:21,214 INFO L93 Difference]: Finished difference Result 255 states and 308 transitions. [2021-10-21 19:43:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:43:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-10-21 19:43:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:21,216 INFO L225 Difference]: With dead ends: 255 [2021-10-21 19:43:21,216 INFO L226 Difference]: Without dead ends: 172 [2021-10-21 19:43:21,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:43:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-21 19:43:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-10-21 19:43:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 170 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2021-10-21 19:43:21,231 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 167 [2021-10-21 19:43:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:21,231 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2021-10-21 19:43:21,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2021-10-21 19:43:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-21 19:43:21,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:21,233 INFO L512 BasicCegarLoop]: trace histogram [55, 54, 29, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:21,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:21,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:43:21,447 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash 520052590, now seen corresponding path program 25 times [2021-10-21 19:43:21,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:21,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131754026] [2021-10-21 19:43:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:21,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:21,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:21,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131754026] [2021-10-21 19:43:21,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131754026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:21,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480698173] [2021-10-21 19:43:21,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:43:21,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:21,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:21,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:21,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:43:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:43:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:22,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480698173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:22,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:22,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-21 19:43:22,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347407014] [2021-10-21 19:43:22,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:43:22,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:43:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:43:22,880 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:22,969 INFO L93 Difference]: Finished difference Result 258 states and 311 transitions. [2021-10-21 19:43:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:43:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-10-21 19:43:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:22,971 INFO L225 Difference]: With dead ends: 258 [2021-10-21 19:43:22,971 INFO L226 Difference]: Without dead ends: 175 [2021-10-21 19:43:22,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:43:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-21 19:43:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-10-21 19:43:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1560693641618498) internal successors, (200), 173 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2021-10-21 19:43:23,006 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 170 [2021-10-21 19:43:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2021-10-21 19:43:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2021-10-21 19:43:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-21 19:43:23,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:23,008 INFO L512 BasicCegarLoop]: trace histogram [56, 55, 30, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:23,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-21 19:43:23,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:43:23,222 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash 948078363, now seen corresponding path program 26 times [2021-10-21 19:43:23,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:23,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304925420] [2021-10-21 19:43:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:23,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:23,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:23,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304925420] [2021-10-21 19:43:23,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304925420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:23,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446182901] [2021-10-21 19:43:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:23,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:23,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:23,680 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:23,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:43:24,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:43:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:24,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446182901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:24,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:24,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-10-21 19:43:24,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533098957] [2021-10-21 19:43:24,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-21 19:43:24,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-21 19:43:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:43:24,795 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:24,877 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2021-10-21 19:43:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-21 19:43:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-10-21 19:43:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:24,883 INFO L225 Difference]: With dead ends: 261 [2021-10-21 19:43:24,883 INFO L226 Difference]: Without dead ends: 178 [2021-10-21 19:43:24,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:43:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-21 19:43:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-10-21 19:43:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1534090909090908) internal successors, (203), 176 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2021-10-21 19:43:24,916 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 173 [2021-10-21 19:43:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:24,916 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2021-10-21 19:43:24,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2021-10-21 19:43:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-10-21 19:43:24,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:24,918 INFO L512 BasicCegarLoop]: trace histogram [57, 56, 31, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:24,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:25,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:43:25,138 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 505979982, now seen corresponding path program 27 times [2021-10-21 19:43:25,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:25,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403224298] [2021-10-21 19:43:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:25,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2406 proven. 1457 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-21 19:43:25,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:25,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403224298] [2021-10-21 19:43:25,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403224298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:25,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984742821] [2021-10-21 19:43:25,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:43:25,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:25,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:25,647 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:25,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:43:26,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-10-21 19:43:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-21 19:43:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2786 proven. 1926 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-10-21 19:43:27,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984742821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:27,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:27,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-10-21 19:43:27,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453677699] [2021-10-21 19:43:27,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-21 19:43:27,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-21 19:43:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-10-21 19:43:27,564 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:28,604 INFO L93 Difference]: Finished difference Result 738 states and 953 transitions. [2021-10-21 19:43:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-21 19:43:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-10-21 19:43:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:28,608 INFO L225 Difference]: With dead ends: 738 [2021-10-21 19:43:28,608 INFO L226 Difference]: Without dead ends: 655 [2021-10-21 19:43:28,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 1655.0ms TimeCoverageRelationStatistics Valid=3419, Invalid=13093, Unknown=0, NotChecked=0, Total=16512 [2021-10-21 19:43:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-10-21 19:43:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 198. [2021-10-21 19:43:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 230 transitions. [2021-10-21 19:43:28,636 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 230 transitions. Word has length 176 [2021-10-21 19:43:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:28,636 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 230 transitions. [2021-10-21 19:43:28,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 230 transitions. [2021-10-21 19:43:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-21 19:43:28,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:28,638 INFO L512 BasicCegarLoop]: trace histogram [64, 63, 32, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:28,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:28,858 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1373262373, now seen corresponding path program 28 times [2021-10-21 19:43:28,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:28,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511284375] [2021-10-21 19:43:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:28,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:29,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:29,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511284375] [2021-10-21 19:43:29,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511284375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:29,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527236372] [2021-10-21 19:43:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:43:29,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:29,420 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:29,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:43:30,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:43:30,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 19:43:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:30,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527236372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:30,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:30,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-10-21 19:43:30,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947226946] [2021-10-21 19:43:30,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 19:43:30,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 19:43:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:43:30,660 INFO L87 Difference]: Start difference. First operand 198 states and 230 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:30,754 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2021-10-21 19:43:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 19:43:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-10-21 19:43:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:30,756 INFO L225 Difference]: With dead ends: 303 [2021-10-21 19:43:30,756 INFO L226 Difference]: Without dead ends: 202 [2021-10-21 19:43:30,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:43:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-21 19:43:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-10-21 19:43:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.165) internal successors, (233), 200 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-10-21 19:43:30,780 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 197 [2021-10-21 19:43:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:30,781 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-10-21 19:43:30,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-10-21 19:43:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-10-21 19:43:30,782 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:30,782 INFO L512 BasicCegarLoop]: trace histogram [65, 64, 33, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:30,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:30,998 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1344545294, now seen corresponding path program 29 times [2021-10-21 19:43:30,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:30,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113699531] [2021-10-21 19:43:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:30,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:31,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113699531] [2021-10-21 19:43:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113699531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:31,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925378906] [2021-10-21 19:43:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:43:31,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,623 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:43:32,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-10-21 19:43:32,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:43:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:32,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925378906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:32,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:32,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-10-21 19:43:32,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140557134] [2021-10-21 19:43:32,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 19:43:32,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 19:43:32,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:43:32,938 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:33,017 INFO L93 Difference]: Finished difference Result 306 states and 371 transitions. [2021-10-21 19:43:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 19:43:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-10-21 19:43:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:33,018 INFO L225 Difference]: With dead ends: 306 [2021-10-21 19:43:33,018 INFO L226 Difference]: Without dead ends: 205 [2021-10-21 19:43:33,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:43:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-21 19:43:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-10-21 19:43:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1625615763546797) internal successors, (236), 203 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 236 transitions. [2021-10-21 19:43:33,054 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 236 transitions. Word has length 200 [2021-10-21 19:43:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:33,055 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 236 transitions. [2021-10-21 19:43:33,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 236 transitions. [2021-10-21 19:43:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-21 19:43:33,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:33,056 INFO L512 BasicCegarLoop]: trace histogram [66, 65, 34, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:33,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:33,282 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:33,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1170711301, now seen corresponding path program 30 times [2021-10-21 19:43:33,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:33,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566016909] [2021-10-21 19:43:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:33,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:33,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:33,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566016909] [2021-10-21 19:43:33,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566016909] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:33,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30937175] [2021-10-21 19:43:33,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:43:33,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,887 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:43:34,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2021-10-21 19:43:34,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:34,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:43:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30937175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:35,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:35,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-21 19:43:35,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593187533] [2021-10-21 19:43:35,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 19:43:35,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 19:43:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:43:35,308 INFO L87 Difference]: Start difference. First operand 204 states and 236 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:35,421 INFO L93 Difference]: Finished difference Result 309 states and 374 transitions. [2021-10-21 19:43:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:43:35,422 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-10-21 19:43:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:35,423 INFO L225 Difference]: With dead ends: 309 [2021-10-21 19:43:35,423 INFO L226 Difference]: Without dead ends: 208 [2021-10-21 19:43:35,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:43:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-21 19:43:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-10-21 19:43:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 206 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2021-10-21 19:43:35,450 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 203 [2021-10-21 19:43:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:35,451 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2021-10-21 19:43:35,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2021-10-21 19:43:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-10-21 19:43:35,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:35,453 INFO L512 BasicCegarLoop]: trace histogram [67, 66, 35, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:35,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-21 19:43:35,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:35,678 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1114480366, now seen corresponding path program 31 times [2021-10-21 19:43:35,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:35,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828358357] [2021-10-21 19:43:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:36,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:36,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828358357] [2021-10-21 19:43:36,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828358357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:36,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283748454] [2021-10-21 19:43:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:43:36,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,257 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:43:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:43:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:37,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283748454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:37,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:37,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-10-21 19:43:37,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189200178] [2021-10-21 19:43:37,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:43:37,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:43:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:43:37,623 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:37,716 INFO L93 Difference]: Finished difference Result 312 states and 377 transitions. [2021-10-21 19:43:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 19:43:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-10-21 19:43:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:37,717 INFO L225 Difference]: With dead ends: 312 [2021-10-21 19:43:37,717 INFO L226 Difference]: Without dead ends: 211 [2021-10-21 19:43:37,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:43:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-21 19:43:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-10-21 19:43:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1578947368421053) internal successors, (242), 209 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 242 transitions. [2021-10-21 19:43:37,735 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 242 transitions. Word has length 206 [2021-10-21 19:43:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:37,735 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 242 transitions. [2021-10-21 19:43:37,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 242 transitions. [2021-10-21 19:43:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-10-21 19:43:37,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:37,737 INFO L512 BasicCegarLoop]: trace histogram [68, 67, 36, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-21 19:43:37,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:43:37,938 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash -267176933, now seen corresponding path program 32 times [2021-10-21 19:43:37,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461825903] [2021-10-21 19:43:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:38,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:38,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461825903] [2021-10-21 19:43:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461825903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481669358] [2021-10-21 19:43:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:38,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:38,596 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:38,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:43:39,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:43:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:40,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481669358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:40,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:40,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-10-21 19:43:40,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001038820] [2021-10-21 19:43:40,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 19:43:40,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 19:43:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:43:40,049 INFO L87 Difference]: Start difference. First operand 210 states and 242 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:40,131 INFO L93 Difference]: Finished difference Result 315 states and 380 transitions. [2021-10-21 19:43:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-21 19:43:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-10-21 19:43:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:40,133 INFO L225 Difference]: With dead ends: 315 [2021-10-21 19:43:40,133 INFO L226 Difference]: Without dead ends: 214 [2021-10-21 19:43:40,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:43:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-21 19:43:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-10-21 19:43:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 212 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 245 transitions. [2021-10-21 19:43:40,155 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 245 transitions. Word has length 209 [2021-10-21 19:43:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:40,156 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 245 transitions. [2021-10-21 19:43:40,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 245 transitions. [2021-10-21 19:43:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-10-21 19:43:40,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:40,158 INFO L512 BasicCegarLoop]: trace histogram [69, 68, 37, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:40,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:40,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:40,362 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1746793422, now seen corresponding path program 33 times [2021-10-21 19:43:40,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:40,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116536194] [2021-10-21 19:43:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:40,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3540 proven. 2072 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-21 19:43:41,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:41,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116536194] [2021-10-21 19:43:41,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116536194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:41,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216652065] [2021-10-21 19:43:41,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:43:41,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:41,054 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:41,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:43:42,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-10-21 19:43:42,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-21 19:43:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3998 proven. 2946 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-21 19:43:43,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216652065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:43,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:43,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-10-21 19:43:43,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440388851] [2021-10-21 19:43:43,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-10-21 19:43:43,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:43,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-10-21 19:43:43,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2021-10-21 19:43:43,597 INFO L87 Difference]: Start difference. First operand 213 states and 245 transitions. Second operand has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:44,959 INFO L93 Difference]: Finished difference Result 900 states and 1163 transitions. [2021-10-21 19:43:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-10-21 19:43:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-10-21 19:43:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:44,964 INFO L225 Difference]: With dead ends: 900 [2021-10-21 19:43:44,964 INFO L226 Difference]: Without dead ends: 799 [2021-10-21 19:43:44,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 2351.2ms TimeCoverageRelationStatistics Valid=4745, Invalid=18511, Unknown=0, NotChecked=0, Total=23256 [2021-10-21 19:43:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-10-21 19:43:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 234. [2021-10-21 19:43:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.167381974248927) internal successors, (272), 233 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-10-21 19:43:45,011 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 212 [2021-10-21 19:43:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:45,011 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-10-21 19:43:45,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-10-21 19:43:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-21 19:43:45,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:45,019 INFO L512 BasicCegarLoop]: trace histogram [76, 75, 38, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:45,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:45,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:43:45,230 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash 625478363, now seen corresponding path program 34 times [2021-10-21 19:43:45,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:45,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384630267] [2021-10-21 19:43:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:45,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:45,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:45,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384630267] [2021-10-21 19:43:45,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384630267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:45,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820226974] [2021-10-21 19:43:45,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:43:45,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:45,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:45,894 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:45,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:43:46,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:43:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:43:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820226974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:47,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:47,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-10-21 19:43:47,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122442948] [2021-10-21 19:43:47,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 19:43:47,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 19:43:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:43:47,480 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:47,576 INFO L93 Difference]: Finished difference Result 357 states and 434 transitions. [2021-10-21 19:43:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-21 19:43:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-10-21 19:43:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:47,578 INFO L225 Difference]: With dead ends: 357 [2021-10-21 19:43:47,578 INFO L226 Difference]: Without dead ends: 238 [2021-10-21 19:43:47,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:43:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-21 19:43:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-10-21 19:43:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 236 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2021-10-21 19:43:47,614 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 233 [2021-10-21 19:43:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:47,614 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2021-10-21 19:43:47,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2021-10-21 19:43:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-10-21 19:43:47,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:47,616 INFO L512 BasicCegarLoop]: trace histogram [77, 76, 39, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:47,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:47,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 19:43:47,837 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash 378249614, now seen corresponding path program 35 times [2021-10-21 19:43:47,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:47,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673061802] [2021-10-21 19:43:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:47,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:48,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:48,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673061802] [2021-10-21 19:43:48,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673061802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:48,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544776372] [2021-10-21 19:43:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:43:48,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:48,482 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:48,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:43:49,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2021-10-21 19:43:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 19:43:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:50,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544776372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:50,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:50,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-10-21 19:43:50,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589295719] [2021-10-21 19:43:50,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 19:43:50,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 19:43:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:43:50,300 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:50,429 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2021-10-21 19:43:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:43:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-10-21 19:43:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:50,430 INFO L225 Difference]: With dead ends: 360 [2021-10-21 19:43:50,430 INFO L226 Difference]: Without dead ends: 241 [2021-10-21 19:43:50,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:43:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-10-21 19:43:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2021-10-21 19:43:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1631799163179917) internal successors, (278), 239 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 278 transitions. [2021-10-21 19:43:50,467 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 278 transitions. Word has length 236 [2021-10-21 19:43:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 278 transitions. [2021-10-21 19:43:50,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 278 transitions. [2021-10-21 19:43:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-10-21 19:43:50,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:50,470 INFO L512 BasicCegarLoop]: trace histogram [78, 77, 40, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:50,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:50,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 19:43:50,690 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:50,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:50,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1055500795, now seen corresponding path program 36 times [2021-10-21 19:43:50,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:50,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012747056] [2021-10-21 19:43:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:50,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:51,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:51,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012747056] [2021-10-21 19:43:51,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012747056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:51,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626025259] [2021-10-21 19:43:51,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:43:51,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:51,446 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:51,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 19:43:52,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2021-10-21 19:43:52,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 19:43:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:53,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626025259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:53,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:53,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-10-21 19:43:53,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439997263] [2021-10-21 19:43:53,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-21 19:43:53,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-21 19:43:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:43:53,245 INFO L87 Difference]: Start difference. First operand 240 states and 278 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:53,385 INFO L93 Difference]: Finished difference Result 363 states and 440 transitions. [2021-10-21 19:43:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 19:43:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-10-21 19:43:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:53,387 INFO L225 Difference]: With dead ends: 363 [2021-10-21 19:43:53,387 INFO L226 Difference]: Without dead ends: 244 [2021-10-21 19:43:53,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:43:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-21 19:43:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-10-21 19:43:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1611570247933884) internal successors, (281), 242 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 281 transitions. [2021-10-21 19:43:53,423 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 281 transitions. Word has length 239 [2021-10-21 19:43:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:53,424 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 281 transitions. [2021-10-21 19:43:53,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 281 transitions. [2021-10-21 19:43:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-21 19:43:53,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:53,426 INFO L512 BasicCegarLoop]: trace histogram [79, 78, 41, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:53,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:53,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 19:43:53,638 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:53,639 INFO L82 PathProgramCache]: Analyzing trace with hash -710922642, now seen corresponding path program 37 times [2021-10-21 19:43:53,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:53,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597957728] [2021-10-21 19:43:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:53,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:54,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:54,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597957728] [2021-10-21 19:43:54,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597957728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:54,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861844211] [2021-10-21 19:43:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:43:54,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:54,431 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 19:43:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:43:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861844211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:56,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:56,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-10-21 19:43:56,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635920403] [2021-10-21 19:43:56,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:43:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:43:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:43:56,175 INFO L87 Difference]: Start difference. First operand 243 states and 281 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:56,336 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-10-21 19:43:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-21 19:43:56,337 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-10-21 19:43:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:56,339 INFO L225 Difference]: With dead ends: 366 [2021-10-21 19:43:56,339 INFO L226 Difference]: Without dead ends: 247 [2021-10-21 19:43:56,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 644.9ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:43:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-21 19:43:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-10-21 19:43:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1591836734693877) internal successors, (284), 245 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 284 transitions. [2021-10-21 19:43:56,374 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 284 transitions. Word has length 242 [2021-10-21 19:43:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:56,375 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 284 transitions. [2021-10-21 19:43:56,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 284 transitions. [2021-10-21 19:43:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-10-21 19:43:56,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:56,377 INFO L512 BasicCegarLoop]: trace histogram [80, 79, 42, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:56,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:56,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:43:56,590 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2002743579, now seen corresponding path program 38 times [2021-10-21 19:43:56,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:56,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711112075] [2021-10-21 19:43:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:56,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:57,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:57,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711112075] [2021-10-21 19:43:57,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711112075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:57,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665686584] [2021-10-21 19:43:57,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:57,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:57,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:57,331 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:57,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 19:43:58,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:58,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-21 19:43:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:43:59,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665686584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:59,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:59,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-10-21 19:43:59,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170145520] [2021-10-21 19:43:59,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-21 19:43:59,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-21 19:43:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 19:43:59,150 INFO L87 Difference]: Start difference. First operand 246 states and 284 transitions. Second operand has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:59,306 INFO L93 Difference]: Finished difference Result 369 states and 446 transitions. [2021-10-21 19:43:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-21 19:43:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-10-21 19:43:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:59,307 INFO L225 Difference]: With dead ends: 369 [2021-10-21 19:43:59,307 INFO L226 Difference]: Without dead ends: 250 [2021-10-21 19:43:59,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 19:43:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-21 19:43:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-10-21 19:43:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.157258064516129) internal successors, (287), 248 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-10-21 19:43:59,338 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 245 [2021-10-21 19:43:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:59,339 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-10-21 19:43:59,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-10-21 19:43:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-10-21 19:43:59,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:59,341 INFO L512 BasicCegarLoop]: trace histogram [81, 80, 43, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:59,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:59,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-21 19:43:59,554 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:43:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:59,555 INFO L82 PathProgramCache]: Analyzing trace with hash 663720782, now seen corresponding path program 39 times [2021-10-21 19:43:59,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:59,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946401094] [2021-10-21 19:43:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:59,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 4890 proven. 2795 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-21 19:44:00,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:00,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946401094] [2021-10-21 19:44:00,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946401094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:00,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656491131] [2021-10-21 19:44:00,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:44:00,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:00,544 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:00,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 19:44:02,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2021-10-21 19:44:02,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-21 19:44:02,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 5426 proven. 4182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-10-21 19:44:03,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656491131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:03,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:03,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-10-21 19:44:03,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672677148] [2021-10-21 19:44:03,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-21 19:44:03,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-21 19:44:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2021-10-21 19:44:03,945 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:05,556 INFO L93 Difference]: Finished difference Result 1062 states and 1373 transitions. [2021-10-21 19:44:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-10-21 19:44:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-10-21 19:44:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:05,561 INFO L225 Difference]: With dead ends: 1062 [2021-10-21 19:44:05,561 INFO L226 Difference]: Without dead ends: 943 [2021-10-21 19:44:05,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 3051.8ms TimeCoverageRelationStatistics Valid=6287, Invalid=24865, Unknown=0, NotChecked=0, Total=31152 [2021-10-21 19:44:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-10-21 19:44:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 270. [2021-10-21 19:44:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1672862453531598) internal successors, (314), 269 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 314 transitions. [2021-10-21 19:44:05,619 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 314 transitions. Word has length 248 [2021-10-21 19:44:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:05,620 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 314 transitions. [2021-10-21 19:44:05,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 314 transitions. [2021-10-21 19:44:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-10-21 19:44:05,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:05,622 INFO L512 BasicCegarLoop]: trace histogram [88, 87, 44, 44, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:05,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:05,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:05,834 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash 665450459, now seen corresponding path program 40 times [2021-10-21 19:44:05,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:05,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061266828] [2021-10-21 19:44:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:05,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-21 19:44:06,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:06,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061266828] [2021-10-21 19:44:06,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061266828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:06,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493449549] [2021-10-21 19:44:06,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:44:06,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:06,812 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:06,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 19:44:08,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:44:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:08,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-21 19:44:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-21 19:44:08,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493449549] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:08,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:08,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-10-21 19:44:08,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043617767] [2021-10-21 19:44:08,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 19:44:08,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 19:44:08,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:44:08,800 INFO L87 Difference]: Start difference. First operand 270 states and 314 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:08,939 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2021-10-21 19:44:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-21 19:44:08,940 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-10-21 19:44:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:08,941 INFO L225 Difference]: With dead ends: 411 [2021-10-21 19:44:08,941 INFO L226 Difference]: Without dead ends: 274 [2021-10-21 19:44:08,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 772.9ms TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:44:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-21 19:44:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-10-21 19:44:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1654411764705883) internal successors, (317), 272 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 317 transitions. [2021-10-21 19:44:08,994 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 317 transitions. Word has length 269 [2021-10-21 19:44:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 317 transitions. [2021-10-21 19:44:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 317 transitions. [2021-10-21 19:44:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-10-21 19:44:08,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:08,997 INFO L512 BasicCegarLoop]: trace histogram [89, 88, 45, 44, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:09,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-21 19:44:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 19:44:09,222 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash 129200398, now seen corresponding path program 41 times [2021-10-21 19:44:09,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:09,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443935598] [2021-10-21 19:44:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:09,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-21 19:44:10,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443935598] [2021-10-21 19:44:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443935598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806947877] [2021-10-21 19:44:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:44:10,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:10,172 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:10,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 19:44:11,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2021-10-21 19:44:11,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:11,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:44:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-21 19:44:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806947877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:12,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-10-21 19:44:12,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997159518] [2021-10-21 19:44:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:44:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:12,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:44:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:44:12,393 INFO L87 Difference]: Start difference. First operand 273 states and 317 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:12,512 INFO L93 Difference]: Finished difference Result 414 states and 503 transitions. [2021-10-21 19:44:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-21 19:44:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-10-21 19:44:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:12,513 INFO L225 Difference]: With dead ends: 414 [2021-10-21 19:44:12,513 INFO L226 Difference]: Without dead ends: 277 [2021-10-21 19:44:12,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:44:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-10-21 19:44:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-10-21 19:44:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1636363636363636) internal successors, (320), 275 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2021-10-21 19:44:12,603 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 272 [2021-10-21 19:44:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:12,604 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2021-10-21 19:44:12,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2021-10-21 19:44:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-10-21 19:44:12,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:12,606 INFO L512 BasicCegarLoop]: trace histogram [90, 89, 46, 44, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:12,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-21 19:44:12,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-21 19:44:12,819 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1981974267, now seen corresponding path program 42 times [2021-10-21 19:44:12,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:12,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499944861] [2021-10-21 19:44:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:12,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6066 proven. 3197 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-21 19:44:13,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499944861] [2021-10-21 19:44:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499944861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:13,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861385527] [2021-10-21 19:44:13,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:44:13,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:13,844 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:13,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-21 19:44:15,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 90 check-sat command(s) [2021-10-21 19:44:15,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:15,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-21 19:44:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6251 proven. 5634 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-21 19:44:17,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861385527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:17,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:17,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2021-10-21 19:44:17,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743038537] [2021-10-21 19:44:17,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-21 19:44:17,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-21 19:44:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2021-10-21 19:44:17,648 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:19,296 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2021-10-21 19:44:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-10-21 19:44:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2021-10-21 19:44:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:19,300 INFO L225 Difference]: With dead ends: 816 [2021-10-21 19:44:19,300 INFO L226 Difference]: Without dead ends: 679 [2021-10-21 19:44:19,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8419 ImplicationChecksByTransitivity, 3326.4ms TimeCoverageRelationStatistics Valid=7139, Invalid=28393, Unknown=0, NotChecked=0, Total=35532 [2021-10-21 19:44:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-10-21 19:44:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 288. [2021-10-21 19:44:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1672473867595818) internal successors, (335), 287 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2021-10-21 19:44:19,355 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 275 [2021-10-21 19:44:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:19,356 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2021-10-21 19:44:19,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2021-10-21 19:44:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-10-21 19:44:19,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:19,358 INFO L512 BasicCegarLoop]: trace histogram [94, 93, 47, 47, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:19,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:19,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-21 19:44:19,574 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash -738002307, now seen corresponding path program 43 times [2021-10-21 19:44:19,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:19,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527893054] [2021-10-21 19:44:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:19,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-21 19:44:20,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:20,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527893054] [2021-10-21 19:44:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527893054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:20,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155819453] [2021-10-21 19:44:20,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:44:20,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:20,532 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:20,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-21 19:44:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 19:44:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-21 19:44:22,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155819453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:22,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:22,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-10-21 19:44:22,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527990588] [2021-10-21 19:44:22,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:44:22,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:44:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:44:22,794 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:22,935 INFO L93 Difference]: Finished difference Result 438 states and 533 transitions. [2021-10-21 19:44:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-21 19:44:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-10-21 19:44:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:22,937 INFO L225 Difference]: With dead ends: 438 [2021-10-21 19:44:22,937 INFO L226 Difference]: Without dead ends: 292 [2021-10-21 19:44:22,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:44:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-21 19:44:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-10-21 19:44:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1655172413793105) internal successors, (338), 290 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 338 transitions. [2021-10-21 19:44:22,980 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 338 transitions. Word has length 287 [2021-10-21 19:44:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:22,980 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 338 transitions. [2021-10-21 19:44:22,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 338 transitions. [2021-10-21 19:44:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-10-21 19:44:22,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:22,983 INFO L512 BasicCegarLoop]: trace histogram [95, 94, 48, 47, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:23,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-21 19:44:23,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-21 19:44:23,210 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:23,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1527665424, now seen corresponding path program 44 times [2021-10-21 19:44:23,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:23,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226267071] [2021-10-21 19:44:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:23,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-21 19:44:24,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:24,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226267071] [2021-10-21 19:44:24,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226267071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:24,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110431885] [2021-10-21 19:44:24,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:24,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:24,336 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:24,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-21 19:44:26,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:44:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:26,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:44:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-21 19:44:26,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110431885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:26,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:26,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-10-21 19:44:26,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639136299] [2021-10-21 19:44:26,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:44:26,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:44:26,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:44:26,708 INFO L87 Difference]: Start difference. First operand 291 states and 338 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:26,839 INFO L93 Difference]: Finished difference Result 441 states and 536 transitions. [2021-10-21 19:44:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-21 19:44:26,839 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2021-10-21 19:44:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:26,841 INFO L225 Difference]: With dead ends: 441 [2021-10-21 19:44:26,841 INFO L226 Difference]: Without dead ends: 295 [2021-10-21 19:44:26,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 978.3ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:44:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-21 19:44:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-10-21 19:44:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1638225255972696) internal successors, (341), 293 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 341 transitions. [2021-10-21 19:44:26,907 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 341 transitions. Word has length 290 [2021-10-21 19:44:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:26,908 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 341 transitions. [2021-10-21 19:44:26,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 341 transitions. [2021-10-21 19:44:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-10-21 19:44:26,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:26,910 INFO L512 BasicCegarLoop]: trace histogram [96, 95, 49, 47, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:26,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:27,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-21 19:44:27,126 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1449263517, now seen corresponding path program 45 times [2021-10-21 19:44:27,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:27,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049145814] [2021-10-21 19:44:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:27,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 6903 proven. 3626 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-21 19:44:28,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:28,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049145814] [2021-10-21 19:44:28,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049145814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:28,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058024989] [2021-10-21 19:44:28,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:44:28,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:28,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:28,144 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:28,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-21 19:44:30,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2021-10-21 19:44:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-21 19:44:30,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7100 proven. 6441 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-10-21 19:44:32,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058024989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:32,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:32,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2021-10-21 19:44:32,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889162221] [2021-10-21 19:44:32,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-21 19:44:32,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-21 19:44:32,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2021-10-21 19:44:32,395 INFO L87 Difference]: Start difference. First operand 294 states and 341 transitions. Second operand has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:36,102 INFO L93 Difference]: Finished difference Result 1049 states and 1288 transitions. [2021-10-21 19:44:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-10-21 19:44:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-10-21 19:44:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:36,108 INFO L225 Difference]: With dead ends: 1049 [2021-10-21 19:44:36,109 INFO L226 Difference]: Without dead ends: 903 [2021-10-21 19:44:36,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17740 ImplicationChecksByTransitivity, 5497.4ms TimeCoverageRelationStatistics Valid=12989, Invalid=48763, Unknown=0, NotChecked=0, Total=61752 [2021-10-21 19:44:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-10-21 19:44:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 306. [2021-10-21 19:44:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1672131147540983) internal successors, (356), 305 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 356 transitions. [2021-10-21 19:44:36,194 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 356 transitions. Word has length 293 [2021-10-21 19:44:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:36,194 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 356 transitions. [2021-10-21 19:44:36,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 356 transitions. [2021-10-21 19:44:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-10-21 19:44:36,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:36,196 INFO L512 BasicCegarLoop]: trace histogram [100, 99, 50, 50, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:36,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-21 19:44:36,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:36,407 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash -933268261, now seen corresponding path program 46 times [2021-10-21 19:44:36,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:36,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379933451] [2021-10-21 19:44:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:36,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7203 proven. 7500 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-10-21 19:44:37,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:37,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379933451] [2021-10-21 19:44:37,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379933451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:37,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502439571] [2021-10-21 19:44:37,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:44:37,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:37,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:37,689 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:37,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-21 19:44:39,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:44:39,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:39,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-21 19:44:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7401 proven. 7302 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-10-21 19:44:40,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502439571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:40,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:40,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 54 [2021-10-21 19:44:40,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687565838] [2021-10-21 19:44:40,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-21 19:44:40,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-21 19:44:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:44:40,330 INFO L87 Difference]: Start difference. First operand 306 states and 356 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:40,696 INFO L93 Difference]: Finished difference Result 461 states and 561 transitions. [2021-10-21 19:44:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 19:44:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-10-21 19:44:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:40,698 INFO L225 Difference]: With dead ends: 461 [2021-10-21 19:44:40,698 INFO L226 Difference]: Without dead ends: 457 [2021-10-21 19:44:40,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 933.0ms TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:44:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-10-21 19:44:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 309. [2021-10-21 19:44:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-10-21 19:44:40,824 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 305 [2021-10-21 19:44:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-10-21 19:44:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-10-21 19:44:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-10-21 19:44:40,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:40,828 INFO L512 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:40,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:41,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-21 19:44:41,054 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:44:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:41,055 INFO L82 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 47 times [2021-10-21 19:44:41,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:41,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797411015] [2021-10-21 19:44:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:41,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:44,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:44,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797411015] [2021-10-21 19:44:44,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797411015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:44,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542060496] [2021-10-21 19:44:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:44:44,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:44,375 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:44,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-21 19:44:46,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2021-10-21 19:44:46,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 205 conjunts are in the unsatisfiable core [2021-10-21 19:44:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:50,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542060496] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:50,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:50,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 155 [2021-10-21 19:44:50,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270242292] [2021-10-21 19:44:50,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-10-21 19:44:50,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-10-21 19:44:50,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=21012, Unknown=0, NotChecked=0, Total=23870 [2021-10-21 19:44:50,930 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:44:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:58,610 INFO L93 Difference]: Finished difference Result 4542 states and 5921 transitions. [2021-10-21 19:44:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-10-21 19:44:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2021-10-21 19:44:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:58,628 INFO L225 Difference]: With dead ends: 4542 [2021-10-21 19:44:58,629 INFO L226 Difference]: Without dead ends: 4382 [2021-10-21 19:44:58,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 5843.1ms TimeCoverageRelationStatistics Valid=2863, Invalid=21317, Unknown=0, NotChecked=0, Total=24180 [2021-10-21 19:44:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-10-21 19:45:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 4186. [2021-10-21 19:45:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 4286 transitions. [2021-10-21 19:45:00,076 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 4286 transitions. Word has length 308 [2021-10-21 19:45:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:00,076 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 4286 transitions. [2021-10-21 19:45:00,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 4286 transitions. [2021-10-21 19:45:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-10-21 19:45:00,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:00,078 INFO L512 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:00,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:00,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-21 19:45:00,291 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:45:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:00,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 48 times [2021-10-21 19:45:00,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:00,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395532358] [2021-10-21 19:45:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:00,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-10-21 19:45:01,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:01,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395532358] [2021-10-21 19:45:01,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395532358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:01,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163123303] [2021-10-21 19:45:01,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:45:01,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:01,559 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:01,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-21 19:45:03,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2021-10-21 19:45:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-21 19:45:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-21 19:45:04,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163123303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:04,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:04,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 55 [2021-10-21 19:45:04,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312717428] [2021-10-21 19:45:04,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-21 19:45:04,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-21 19:45:04,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:45:04,709 INFO L87 Difference]: Start difference. First operand 4186 states and 4286 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:05,024 INFO L93 Difference]: Finished difference Result 4337 states and 4437 transitions. [2021-10-21 19:45:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-21 19:45:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-10-21 19:45:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:05,026 INFO L225 Difference]: With dead ends: 4337 [2021-10-21 19:45:05,026 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:45:05,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 933.6ms TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:45:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:45:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:45:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:45:05,031 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-10-21 19:45:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:05,031 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:45:05,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:45:05,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:45:05,034 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:45:05,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:05,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:05,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:45:05,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:45:05,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:45:05,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:45:19,733 WARN L207 SmtUtils]: Spent 14.47 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1660 [2021-10-21 19:46:03,202 WARN L207 SmtUtils]: Spent 43.44 s on a formula simplification. DAG size of input: 1611 DAG size of output: 458 [2021-10-21 19:46:03,212 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:46:03,212 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-10-21 19:46:03,213 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-10-21 19:46:03,213 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-21 19:46:03,213 INFO L860 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-10-21 19:46:03,213 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:46:03,213 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:46:03,213 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:46:03,215 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse10 (<= ULTIMATE.start_main_~y~0 44)) (.cse11 (<= 44 ULTIMATE.start_main_~y~0)) (.cse24 (<= ULTIMATE.start_main_~y~0 42)) (.cse25 (<= 42 ULTIMATE.start_main_~y~0)) (.cse22 (<= ULTIMATE.start_main_~y~0 22)) (.cse23 (<= 22 ULTIMATE.start_main_~y~0)) (.cse41 (<= 35 ULTIMATE.start_main_~y~0)) (.cse42 (<= ULTIMATE.start_main_~y~0 35)) (.cse59 (<= ULTIMATE.start_main_~y~0 39)) (.cse60 (<= 39 ULTIMATE.start_main_~y~0)) (.cse16 (<= ULTIMATE.start_main_~y~0 16)) (.cse17 (<= 16 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~y~0 37)) (.cse7 (<= 37 ULTIMATE.start_main_~y~0)) (.cse45 (<= 36 ULTIMATE.start_main_~y~0)) (.cse46 (<= ULTIMATE.start_main_~y~0 36)) (.cse37 (<= 32 ULTIMATE.start_main_~y~0)) (.cse38 (<= ULTIMATE.start_main_~y~0 32)) (.cse73 (<= 12 ULTIMATE.start_main_~y~0)) (.cse74 (<= ULTIMATE.start_main_~y~0 12)) (.cse8 (<= ULTIMATE.start_main_~y~0 46)) (.cse9 (<= 46 ULTIMATE.start_main_~y~0)) (.cse71 (<= 2 ULTIMATE.start_main_~y~0)) (.cse72 (<= ULTIMATE.start_main_~y~0 2)) (.cse65 (<= 11 ULTIMATE.start_main_~y~0)) (.cse66 (<= ULTIMATE.start_main_~y~0 11)) (.cse47 (<= 47 ULTIMATE.start_main_~y~0)) (.cse48 (<= ULTIMATE.start_main_~y~0 47)) (.cse49 (<= ULTIMATE.start_main_~y~0 33)) (.cse50 (<= 33 ULTIMATE.start_main_~y~0)) (.cse57 (<= 26 ULTIMATE.start_main_~y~0)) (.cse58 (<= ULTIMATE.start_main_~y~0 26)) (.cse12 (<= 41 ULTIMATE.start_main_~y~0)) (.cse13 (<= ULTIMATE.start_main_~y~0 41)) (.cse29 (<= 8 ULTIMATE.start_main_~y~0)) (.cse30 (<= ULTIMATE.start_main_~y~0 8)) (.cse77 (<= ULTIMATE.start_main_~y~0 45)) (.cse78 (<= 45 ULTIMATE.start_main_~y~0)) (.cse51 (<= ULTIMATE.start_main_~y~0 30)) (.cse52 (<= 30 ULTIMATE.start_main_~y~0)) (.cse39 (<= 15 ULTIMATE.start_main_~y~0)) (.cse40 (<= ULTIMATE.start_main_~y~0 15)) (.cse27 (<= 40 ULTIMATE.start_main_~y~0)) (.cse28 (<= ULTIMATE.start_main_~y~0 40)) (.cse2 (<= ULTIMATE.start_main_~y~0 20)) (.cse3 (<= 20 ULTIMATE.start_main_~y~0)) (.cse31 (<= 29 ULTIMATE.start_main_~y~0)) (.cse32 (<= ULTIMATE.start_main_~y~0 29)) (.cse20 (<= 10 ULTIMATE.start_main_~y~0)) (.cse21 (<= ULTIMATE.start_main_~y~0 10)) (.cse79 (<= 48 ULTIMATE.start_main_~y~0)) (.cse80 (<= ULTIMATE.start_main_~y~0 48)) (.cse35 (<= ULTIMATE.start_main_~y~0 4)) (.cse36 (<= 4 ULTIMATE.start_main_~y~0)) (.cse43 (<= 7 ULTIMATE.start_main_~y~0)) (.cse44 (<= ULTIMATE.start_main_~y~0 7)) (.cse61 (<= 25 ULTIMATE.start_main_~y~0)) (.cse62 (<= ULTIMATE.start_main_~y~0 25)) (.cse69 (<= 19 ULTIMATE.start_main_~y~0)) (.cse70 (<= ULTIMATE.start_main_~y~0 19)) (.cse85 (<= 1 ULTIMATE.start_main_~y~0)) (.cse86 (<= ULTIMATE.start_main_~y~0 1)) (.cse67 (<= 38 ULTIMATE.start_main_~y~0)) (.cse68 (<= ULTIMATE.start_main_~y~0 38)) (.cse63 (<= ULTIMATE.start_main_~y~0 14)) (.cse64 (<= 14 ULTIMATE.start_main_~y~0)) (.cse18 (<= ULTIMATE.start_main_~y~0 6)) (.cse19 (<= 6 ULTIMATE.start_main_~y~0)) (.cse53 (<= ULTIMATE.start_main_~y~0 21)) (.cse54 (<= 21 ULTIMATE.start_main_~y~0)) (.cse55 (<= 5 ULTIMATE.start_main_~y~0)) (.cse56 (<= ULTIMATE.start_main_~y~0 5)) (.cse4 (<= 9 ULTIMATE.start_main_~y~0)) (.cse5 (<= ULTIMATE.start_main_~y~0 9)) (.cse81 (<= 28 ULTIMATE.start_main_~y~0)) (.cse82 (<= ULTIMATE.start_main_~y~0 28)) (.cse89 (<= ULTIMATE.start_main_~y~0 34)) (.cse90 (<= 34 ULTIMATE.start_main_~y~0)) (.cse26 (= ULTIMATE.start_main_~y~0 0)) (.cse0 (<= ULTIMATE.start_main_~y~0 24)) (.cse1 (<= 24 ULTIMATE.start_main_~y~0)) (.cse93 (<= ULTIMATE.start_main_~y~0 23)) (.cse94 (<= 23 ULTIMATE.start_main_~y~0)) (.cse83 (<= 27 ULTIMATE.start_main_~y~0)) (.cse84 (<= ULTIMATE.start_main_~y~0 27)) (.cse33 (<= 18 ULTIMATE.start_main_~y~0)) (.cse34 (<= ULTIMATE.start_main_~y~0 18)) (.cse97 (<= ULTIMATE.start_main_~y~0 3)) (.cse98 (<= 3 ULTIMATE.start_main_~y~0)) (.cse91 (<= ULTIMATE.start_main_~y~0 49)) (.cse92 (<= 49 ULTIMATE.start_main_~y~0)) (.cse14 (<= ULTIMATE.start_main_~y~0 13)) (.cse15 (<= 13 ULTIMATE.start_main_~y~0)) (.cse87 (<= ULTIMATE.start_main_~y~0 17)) (.cse88 (<= 17 ULTIMATE.start_main_~y~0)) (.cse95 (<= ULTIMATE.start_main_~y~0 31)) (.cse96 (<= 31 ULTIMATE.start_main_~y~0)) (.cse75 (<= 43 ULTIMATE.start_main_~y~0)) (.cse76 (<= ULTIMATE.start_main_~y~0 43))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 24)) (and (= ULTIMATE.start_main_~x~0 20) .cse2 .cse3) (and .cse4 (= ULTIMATE.start_main_~x~0 9) .cse5) (and (<= ULTIMATE.start_main_~x~0 63) .cse6 .cse7 (<= 63 ULTIMATE.start_main_~x~0)) (and .cse8 (= ULTIMATE.start_main_~x~0 46) .cse9) (and (= ULTIMATE.start_main_~x~0 44) .cse10 .cse11) (and (= 41 ULTIMATE.start_main_~x~0) .cse12 .cse13) (and .cse14 (<= ULTIMATE.start_main_~x~0 87) .cse15 (<= 87 ULTIMATE.start_main_~x~0)) (and .cse16 .cse17 (= ULTIMATE.start_main_~x~0 16)) (and .cse18 (= ULTIMATE.start_main_~x~0 6) .cse19) (and (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse10 .cse11) (and .cse20 (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90) .cse21) (and .cse22 (<= 78 ULTIMATE.start_main_~x~0) .cse23 (<= ULTIMATE.start_main_~x~0 78)) (and .cse24 .cse25 (= ULTIMATE.start_main_~x~0 42)) (and .cse26 (= ULTIMATE.start_main_~x~0 0)) (and .cse24 .cse25 (<= 58 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 58)) (and .cse27 .cse28 (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 8) .cse29 .cse30) (and .cse31 .cse32 (= ULTIMATE.start_main_~x~0 29)) (and (<= ULTIMATE.start_main_~x~0 82) .cse33 .cse34 (<= 82 ULTIMATE.start_main_~x~0)) (and (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 96) .cse35 .cse36) (and .cse37 (= ULTIMATE.start_main_~x~0 32) .cse38) (and .cse39 .cse40 (= ULTIMATE.start_main_~x~0 15)) (and .cse41 .cse42 (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0)) (and .cse43 .cse44 (= ULTIMATE.start_main_~x~0 7)) (and (= ULTIMATE.start_main_~x~0 36) .cse45 .cse46) (and .cse47 (= ULTIMATE.start_main_~x~0 47) .cse48) (and .cse49 (<= 67 ULTIMATE.start_main_~x~0) .cse50 (<= ULTIMATE.start_main_~x~0 67)) (and .cse51 .cse52 (= ULTIMATE.start_main_~x~0 30)) (and .cse22 .cse23 (= ULTIMATE.start_main_~x~0 22)) (and (= ULTIMATE.start_main_~x~0 35) .cse41 .cse42) (and .cse53 (<= ULTIMATE.start_main_~x~0 79) .cse54 (<= 79 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 5) .cse55 .cse56) (and (= ULTIMATE.start_main_~x~0 26) .cse57 .cse58) (and (<= 61 ULTIMATE.start_main_~x~0) .cse59 (<= ULTIMATE.start_main_~x~0 61) .cse60) (and .cse61 (= ULTIMATE.start_main_~x~0 25) .cse62) (and (= ULTIMATE.start_main_~x~0 39) .cse59 .cse60) (and .cse16 .cse17 (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0)) (and .cse63 (<= 86 ULTIMATE.start_main_~x~0) .cse64 (<= ULTIMATE.start_main_~x~0 86)) (and .cse6 (= ULTIMATE.start_main_~x~0 37) .cse7) (and .cse65 (= ULTIMATE.start_main_~x~0 11) .cse66) (and .cse67 (<= ULTIMATE.start_main_~x~0 62) .cse68 (<= 62 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) .cse45 .cse46) (and (<= 68 ULTIMATE.start_main_~x~0) .cse37 (<= ULTIMATE.start_main_~x~0 68) .cse38) (and (<= 81 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 81) .cse69 .cse70) (and .cse71 .cse72 (= ULTIMATE.start_main_~x~0 2)) (and .cse73 .cse74 (= ULTIMATE.start_main_~x~0 12)) (and .cse73 .cse74 (<= 88 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 88)) (and (<= 54 ULTIMATE.start_main_~x~0) .cse8 (<= ULTIMATE.start_main_~x~0 54) .cse9) (and .cse71 .cse72 (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (= ULTIMATE.start_main_~x~0 43) .cse75 .cse76) (and (<= ULTIMATE.start_main_~x~0 55) .cse77 .cse78 (<= 55 ULTIMATE.start_main_~x~0)) (and .cse65 (<= 89 ULTIMATE.start_main_~x~0) .cse66 (<= ULTIMATE.start_main_~x~0 89)) (and .cse47 (<= ULTIMATE.start_main_~x~0 53) (<= 53 ULTIMATE.start_main_~x~0) .cse48) (and .cse79 .cse80 (= ULTIMATE.start_main_~x~0 48)) (and (= ULTIMATE.start_main_~x~0 33) .cse49 .cse50) (and (<= 74 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 74) .cse57 .cse58) (and .cse81 (<= ULTIMATE.start_main_~x~0 72) .cse82 (<= 72 ULTIMATE.start_main_~x~0)) (and .cse12 (<= 59 ULTIMATE.start_main_~x~0) .cse13 (<= ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~x~0 92) .cse29 (<= 92 ULTIMATE.start_main_~x~0) .cse30) (and .cse77 (= ULTIMATE.start_main_~x~0 45) .cse78) (and .cse83 .cse84 (= ULTIMATE.start_main_~x~0 27)) (and (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 70) .cse51 .cse52) (and .cse39 .cse40 (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and .cse27 .cse28 (= 40 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 99) (<= 99 ULTIMATE.start_main_~x~0) .cse85 .cse86) (and (<= ULTIMATE.start_main_~x~0 80) .cse2 .cse3 (<= 80 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) .cse31 .cse32 (<= ULTIMATE.start_main_~x~0 71)) (and .cse20 (= ULTIMATE.start_main_~x~0 10) .cse21) (and .cse79 (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse80) (and .cse87 (= ULTIMATE.start_main_~x~0 17) .cse88) (and .cse89 (= ULTIMATE.start_main_~x~0 34) .cse90) (and (= ULTIMATE.start_main_~x~0 4) .cse35 .cse36) (and (<= ULTIMATE.start_main_~x~0 93) .cse43 .cse44 (<= 93 ULTIMATE.start_main_~x~0)) (and .cse61 (<= 75 ULTIMATE.start_main_~x~0) .cse62 (<= ULTIMATE.start_main_~x~0 75)) (and (= 19 ULTIMATE.start_main_~x~0) .cse69 .cse70) (and (= ULTIMATE.start_main_~x~0 1) .cse85 .cse86) (and .cse67 (= ULTIMATE.start_main_~x~0 38) .cse68) (and .cse63 .cse64 (= ULTIMATE.start_main_~x~0 14)) (and .cse18 (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) .cse19) (and .cse53 .cse54 (= ULTIMATE.start_main_~x~0 21)) (and .cse91 .cse92 (= ULTIMATE.start_main_~x~0 49)) (and (= 23 ULTIMATE.start_main_~x~0) .cse93 .cse94) (and .cse55 .cse56 (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 95)) (and (<= ULTIMATE.start_main_~x~0 69) .cse95 (<= 69 ULTIMATE.start_main_~x~0) .cse96) (and (<= ULTIMATE.start_main_~x~0 91) .cse4 (<= 91 ULTIMATE.start_main_~x~0) .cse5) (and .cse81 .cse82 (= ULTIMATE.start_main_~x~0 28)) (and (= ULTIMATE.start_main_~x~0 3) .cse97 .cse98) (and .cse89 (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 66) .cse90) (and .cse26 (< 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 100)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and .cse93 (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 77) .cse94) (and .cse83 (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 73) .cse84) (and .cse33 .cse34 (= ULTIMATE.start_main_~x~0 18)) (and .cse97 (<= ULTIMATE.start_main_~x~0 97) .cse98 (<= 97 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= 50 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~x~0)) (and .cse91 (<= ULTIMATE.start_main_~x~0 51) .cse92 (<= 51 ULTIMATE.start_main_~x~0)) (and .cse14 .cse15 (= ULTIMATE.start_main_~x~0 13)) (and .cse87 .cse88 (<= 83 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 83)) (and .cse95 (= ULTIMATE.start_main_~x~0 31) .cse96) (and (<= 57 ULTIMATE.start_main_~x~0) .cse75 .cse76 (<= ULTIMATE.start_main_~x~0 57)))) [2021-10-21 19:46:03,215 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-10-21 19:46:03,215 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-21 19:46:03,216 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-21 19:46:03,216 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-21 19:46:03,223 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:46:03,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:46:03 BoogieIcfgContainer [2021-10-21 19:46:03,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:46:03,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:46:03,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:46:03,262 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:46:03,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:52" (3/4) ... [2021-10-21 19:46:03,265 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:46:03,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 19:46:03,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:46:03,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:46:03,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:46:03,321 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:46:03,322 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:46:03,322 INFO L168 Benchmark]: Toolchain (without parser) took 191715.02 ms. Allocated memory was 94.4 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 65.7 MB in the beginning and 1.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 883.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:03,323 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:46:03,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.63 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 65.5 MB in the beginning and 97.3 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:03,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.26 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 96.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:03,324 INFO L168 Benchmark]: Boogie Preprocessor took 38.89 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 95.2 MB in the end (delta: 843.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:46:03,324 INFO L168 Benchmark]: RCFGBuilder took 314.09 ms. Allocated memory is still 121.6 MB. Free memory was 95.2 MB in the beginning and 86.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:03,324 INFO L168 Benchmark]: TraceAbstraction took 191001.83 ms. Allocated memory was 121.6 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 85.5 MB in the beginning and 1.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.1 GB. [2021-10-21 19:46:03,325 INFO L168 Benchmark]: Witness Printer took 59.92 ms. Allocated memory is still 2.4 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:46:03,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.63 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 65.5 MB in the beginning and 97.3 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.26 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 96.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.89 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 95.2 MB in the end (delta: 843.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 314.09 ms. Allocated memory is still 121.6 MB. Free memory was 95.2 MB in the beginning and 86.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 191001.83 ms. Allocated memory was 121.6 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 85.5 MB in the beginning and 1.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.1 GB. * Witness Printer took 59.92 ms. Allocated memory is still 2.4 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 190900.2ms, OverallIterations: 51, TraceHistogramMax: 102, EmptinessCheckTime: 85.9ms, AutomataDifference: 23743.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 57965.1ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 987 SDtfs, 1492 SDslu, 20603 SDs, 0 SdLazy, 26193 SolverSat, 2170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8817.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10159 GetRequests, 7669 SyntacticMatches, 2 SemanticMatches, 2488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59581 ImplicationChecksByTransitivity, 39642.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4186occurred in iteration=50, InterpolantAutomatonStates: 2196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2728.9ms AutomataMinimizationTime, 51 MinimizatonAttempts, 3770 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1160 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1294097411 FormulaSimplificationTreeSizeReduction, 14491.5ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 141278450 FormulaSimplificationTreeSizeReductionInter, 43451.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 784.6ms SsaConstructionTime, 4239.0ms SatisfiabilityAnalysisTime, 55731.5ms InterpolantComputationTime, 15850 NumberOfCodeBlocks, 15847 NumberOfCodeBlocksAsserted, 1415 NumberOfCheckSat, 15751 ConstructedInterpolants, 0 QuantifiedInterpolants, 36654 SizeOfPredicates, 2 NumberOfNonLiveVariables, 19531 ConjunctsInSsa, 1941 ConjunctsInUnsatCore, 99 InterpolantComputations, 3 PerfectInterpolantSequences, 343184/532878 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 24 && 24 <= y) && x == 24) || ((x == 20 && y <= 20) && 20 <= y)) || ((9 <= y && x == 9) && y <= 9)) || (((x <= 63 && y <= 37) && 37 <= y) && 63 <= x)) || ((y <= 46 && x == 46) && 46 <= y)) || ((x == 44 && y <= 44) && 44 <= y)) || ((41 == x && 41 <= y) && y <= 41)) || (((y <= 13 && x <= 87) && 13 <= y) && 87 <= x)) || ((y <= 16 && 16 <= y) && x == 16)) || ((y <= 6 && x == 6) && 6 <= y)) || (((56 <= x && x <= 56) && y <= 44) && 44 <= y)) || (((10 <= y && 90 <= x) && x <= 90) && y <= 10)) || (((y <= 22 && 78 <= x) && 22 <= y) && x <= 78)) || ((y <= 42 && 42 <= y) && x == 42)) || (y == 0 && x == 0)) || (((y <= 42 && 42 <= y) && 58 <= x) && x <= 58)) || (((40 <= y && y <= 40) && x <= 60) && 60 <= x)) || ((x == 8 && 8 <= y) && y <= 8)) || ((29 <= y && y <= 29) && x == 29)) || (((x <= 82 && 18 <= y) && y <= 18) && 82 <= x)) || (((96 <= x && x <= 96) && y <= 4) && 4 <= y)) || ((32 <= y && x == 32) && y <= 32)) || ((15 <= y && y <= 15) && x == 15)) || (((35 <= y && y <= 35) && x <= 65) && 65 <= x)) || ((7 <= y && y <= 7) && x == 7)) || ((x == 36 && 36 <= y) && y <= 36)) || ((47 <= y && x == 47) && y <= 47)) || (((y <= 33 && 67 <= x) && 33 <= y) && x <= 67)) || ((y <= 30 && 30 <= y) && x == 30)) || ((y <= 22 && 22 <= y) && x == 22)) || ((x == 35 && 35 <= y) && y <= 35)) || (((y <= 21 && x <= 79) && 21 <= y) && 79 <= x)) || ((x == 5 && 5 <= y) && y <= 5)) || ((x == 26 && 26 <= y) && y <= 26)) || (((61 <= x && y <= 39) && x <= 61) && 39 <= y)) || ((25 <= y && x == 25) && y <= 25)) || ((x == 39 && y <= 39) && 39 <= y)) || (((y <= 16 && 16 <= y) && x <= 84) && 84 <= x)) || (((y <= 14 && 86 <= x) && 14 <= y) && x <= 86)) || ((y <= 37 && x == 37) && 37 <= y)) || ((11 <= y && x == 11) && y <= 11)) || (((38 <= y && x <= 62) && y <= 38) && 62 <= x)) || (((x <= 64 && 64 <= x) && 36 <= y) && y <= 36)) || (((68 <= x && 32 <= y) && x <= 68) && y <= 32)) || (((81 <= x && x <= 81) && 19 <= y) && y <= 19)) || ((2 <= y && y <= 2) && x == 2)) || ((12 <= y && y <= 12) && x == 12)) || (((12 <= y && y <= 12) && 88 <= x) && x <= 88)) || (((54 <= x && y <= 46) && x <= 54) && 46 <= y)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || ((x == 43 && 43 <= y) && y <= 43)) || (((x <= 55 && y <= 45) && 45 <= y) && 55 <= x)) || (((11 <= y && 89 <= x) && y <= 11) && x <= 89)) || (((47 <= y && x <= 53) && 53 <= x) && y <= 47)) || ((48 <= y && y <= 48) && x == 48)) || ((x == 33 && y <= 33) && 33 <= y)) || (((74 <= x && x <= 74) && 26 <= y) && y <= 26)) || (((28 <= y && x <= 72) && y <= 28) && 72 <= x)) || (((41 <= y && 59 <= x) && y <= 41) && x <= 59)) || (((x <= 92 && 8 <= y) && 92 <= x) && y <= 8)) || ((y <= 45 && x == 45) && 45 <= y)) || ((27 <= y && y <= 27) && x == 27)) || (((70 <= x && x <= 70) && y <= 30) && 30 <= y)) || (((15 <= y && y <= 15) && x <= 85) && 85 <= x)) || ((40 <= y && y <= 40) && 40 == x)) || (((x <= 99 && 99 <= x) && 1 <= y) && y <= 1)) || (((x <= 80 && y <= 20) && 20 <= y) && 80 <= x)) || (((71 <= x && 29 <= y) && y <= 29) && x <= 71)) || ((10 <= y && x == 10) && y <= 10)) || (((48 <= y && 52 <= x) && x <= 52) && y <= 48)) || ((y <= 17 && x == 17) && 17 <= y)) || ((y <= 34 && x == 34) && 34 <= y)) || ((x == 4 && y <= 4) && 4 <= y)) || (((x <= 93 && 7 <= y) && y <= 7) && 93 <= x)) || (((25 <= y && 75 <= x) && y <= 25) && x <= 75)) || ((19 == x && 19 <= y) && y <= 19)) || ((x == 1 && 1 <= y) && y <= 1)) || ((38 <= y && x == 38) && y <= 38)) || ((y <= 14 && 14 <= y) && x == 14)) || (((y <= 6 && 94 <= x) && x <= 94) && 6 <= y)) || ((y <= 21 && 21 <= y) && x == 21)) || ((y <= 49 && 49 <= y) && x == 49)) || ((23 == x && y <= 23) && 23 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || (((x <= 69 && y <= 31) && 69 <= x) && 31 <= y)) || (((x <= 91 && 9 <= y) && 91 <= x) && y <= 9)) || ((28 <= y && y <= 28) && x == 28)) || ((x == 3 && y <= 3) && 3 <= y)) || (((y <= 34 && 66 <= x) && x <= 66) && 34 <= y)) || ((y == 0 && 99 < x) && x <= 100)) || (((y <= 24 && 24 <= y) && x <= 76) && 76 <= x)) || (((y <= 23 && 77 <= x) && x <= 77) && 23 <= y)) || (((27 <= y && 73 <= x) && x <= 73) && y <= 27)) || ((18 <= y && y <= 18) && x == 18)) || (((y <= 3 && x <= 97) && 3 <= y) && 97 <= x)) || (((x <= 50 && 50 <= y) && y <= 50) && 50 <= x)) || (((y <= 49 && x <= 51) && 49 <= y) && 51 <= x)) || ((y <= 13 && 13 <= y) && x == 13)) || (((y <= 17 && 17 <= y) && 83 <= x) && x <= 83)) || ((y <= 31 && x == 31) && 31 <= y)) || (((57 <= x && 43 <= y) && y <= 43) && x <= 57) RESULT: Ultimate proved your program to be correct! [2021-10-21 19:46:03,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28daeb59-dfe5-4120-9931-e1c23e9bbe6e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...