./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF --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 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:37:32,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:37:32,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:37:32,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:37:32,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:37:32,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:37:32,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:37:32,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:37:32,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:37:32,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:37:32,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:37:32,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:37:32,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:37:32,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:37:32,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:37:32,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:37:32,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:37:32,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:37:32,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:37:32,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:37:32,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:37:32,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:37:32,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:37:32,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:37:32,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:37:32,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:37:32,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:37:32,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:37:32,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:37:32,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:37:32,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:37:32,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:37:32,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:37:32,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:37:32,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:37:32,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:37:32,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:37:32,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:37:32,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:37:32,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:37:32,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:37:32,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:37:32,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:37:32,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:37:32,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:37:32,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:37:32,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:37:32,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:37:32,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:37:32,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:37:32,705 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:37:32,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:37:32,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:37:32,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:37:32,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:37:32,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:37:32,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:37:32,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:37:32,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:37:32,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:37:32,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:37:32,708 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:37:32,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:37:32,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:37:32,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:37:32,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:37:32,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:37:32,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:37:32,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:37:32,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:37:32,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:37:32,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:37:32,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:37:32,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:37:32,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:37:32,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:37:32,713 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_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 [2021-11-20 05:37:33,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:37:33,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:37:33,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:37:33,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:37:33,088 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:37:33,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/reducercommutativity/max05-1.i [2021-11-20 05:37:33,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/data/eec3c2859/d2b69d2608734f6fad10a5ff29325478/FLAGfae389697 [2021-11-20 05:37:33,696 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:37:33,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/sv-benchmarks/c/reducercommutativity/max05-1.i [2021-11-20 05:37:33,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/data/eec3c2859/d2b69d2608734f6fad10a5ff29325478/FLAGfae389697 [2021-11-20 05:37:34,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/data/eec3c2859/d2b69d2608734f6fad10a5ff29325478 [2021-11-20 05:37:34,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:37:34,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:37:34,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:37:34,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:37:34,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:37:34,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52638be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34, skipping insertion in model container [2021-11-20 05:37:34,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:37:34,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:37:34,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2021-11-20 05:37:34,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:34,430 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:37:34,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2021-11-20 05:37:34,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:34,502 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:37:34,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34 WrapperNode [2021-11-20 05:37:34,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:37:34,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:37:34,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:37:34,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:37:34,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,547 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-11-20 05:37:34,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:37:34,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:37:34,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:37:34,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:37:34,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:37:34,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:37:34,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:37:34,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:37:34,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:37:34,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:34,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:37:34,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:37:34,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:37:34,685 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-11-20 05:37:34,686 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-11-20 05:37:34,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:37:34,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:37:34,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:37:34,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:37:34,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:37:34,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:37:34,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:37:34,768 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:37:34,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:37:34,922 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:37:34,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:37:34,929 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:37:34,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:37:34 BoogieIcfgContainer [2021-11-20 05:37:34,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:37:34,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:37:34,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:37:34,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:37:34,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:37:34" (1/3) ... [2021-11-20 05:37:34,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ccd482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:37:34, skipping insertion in model container [2021-11-20 05:37:34,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (2/3) ... [2021-11-20 05:37:34,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ccd482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:37:34, skipping insertion in model container [2021-11-20 05:37:34,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:37:34" (3/3) ... [2021-11-20 05:37:34,941 INFO L111 eAbstractionObserver]: Analyzing ICFG max05-1.i [2021-11-20 05:37:34,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:37:34,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:37:35,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:37:35,071 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 [2021-11-20 05:37:35,071 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:37:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:37:35,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:35,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:35,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2021-11-20 05:37:35,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:35,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417410692] [2021-11-20 05:37:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:35,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:37:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 05:37:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:37:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:37:35,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417410692] [2021-11-20 05:37:35,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417410692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:35,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:35,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:37:35,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038208480] [2021-11-20 05:37:35,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:35,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:37:35,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:37:35,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:37:35,388 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:37:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:35,423 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-11-20 05:37:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:37:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-20 05:37:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:35,435 INFO L225 Difference]: With dead ends: 52 [2021-11-20 05:37:35,435 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 05:37:35,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:37:35,445 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:35,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 05:37:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 05:37:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-20 05:37:35,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-11-20 05:37:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:35,499 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-20 05:37:35,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:37:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-20 05:37:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:37:35,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:35,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:37:35,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2021-11-20 05:37:35,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815748918] [2021-11-20 05:37:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:37:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 05:37:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:37:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:37:35,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815748918] [2021-11-20 05:37:35,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815748918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737202749] [2021-11-20 05:37:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:35,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:35,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:35,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:35,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:37:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:37:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:37:35,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:37:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737202749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:35,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:35,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 05:37:35,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769180863] [2021-11-20 05:37:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:35,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:37:35,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:37:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:35,963 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:37:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:36,001 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-11-20 05:37:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:37:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-20 05:37:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:36,004 INFO L225 Difference]: With dead ends: 46 [2021-11-20 05:37:36,004 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 05:37:36,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:36,008 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:36,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 05:37:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-20 05:37:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-20 05:37:36,029 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2021-11-20 05:37:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:36,030 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-20 05:37:36,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:37:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-20 05:37:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:37:36,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:36,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:36,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 05:37:36,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2021-11-20 05:37:36,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16524839] [2021-11-20 05:37:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 05:37:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:37:36,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:36,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16524839] [2021-11-20 05:37:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16524839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:36,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730927039] [2021-11-20 05:37:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:36,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:36,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:36,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:37:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:37:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:37:36,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:37:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730927039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:36,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 05:37:36,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591196901] [2021-11-20 05:37:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:37:36,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:37:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:36,553 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:37:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:36,580 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-11-20 05:37:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:37:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-20 05:37:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:36,583 INFO L225 Difference]: With dead ends: 48 [2021-11-20 05:37:36,583 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 05:37:36,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:36,588 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:36,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 05:37:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-20 05:37:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-20 05:37:36,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2021-11-20 05:37:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:36,606 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-20 05:37:36,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:37:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-20 05:37:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:37:36,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:36,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:36,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:36,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:36,827 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2021-11-20 05:37:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011157431] [2021-11-20 05:37:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:37:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 05:37:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:37:36,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:36,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011157431] [2021-11-20 05:37:36,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011157431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:36,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787730094] [2021-11-20 05:37:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:36,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:36,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:36,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:37:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:37:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:37:37,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:37:37,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787730094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:37,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:37,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 05:37:37,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064869251] [2021-11-20 05:37:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:37,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:37:37,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:37:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:37:37,165 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:37:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:37,192 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-20 05:37:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:37:37,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-11-20 05:37:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:37,197 INFO L225 Difference]: With dead ends: 43 [2021-11-20 05:37:37,198 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 05:37:37,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:37:37,201 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:37,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 05:37:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-20 05:37:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-20 05:37:37,211 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2021-11-20 05:37:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:37,220 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-20 05:37:37,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:37:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-20 05:37:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:37:37,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:37,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:37,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:37,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:37,451 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2021-11-20 05:37:37,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625658345] [2021-11-20 05:37:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:37,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:37:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 05:37:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:37:37,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625658345] [2021-11-20 05:37:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625658345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069946663] [2021-11-20 05:37:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:37,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:37,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:37,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:37:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:37:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:37:37,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:37:37,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069946663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:37,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:37,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-11-20 05:37:37,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529509234] [2021-11-20 05:37:37,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:37,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:37:37,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:37,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:37:37,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:37:37,950 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 05:37:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:38,017 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-11-20 05:37:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:37:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2021-11-20 05:37:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:38,021 INFO L225 Difference]: With dead ends: 62 [2021-11-20 05:37:38,021 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 05:37:38,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:37:38,023 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:38,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 05:37:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-11-20 05:37:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-20 05:37:38,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2021-11-20 05:37:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:38,044 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-20 05:37:38,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 05:37:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-20 05:37:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 05:37:38,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:38,053 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:38,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:38,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:38,270 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2021-11-20 05:37:38,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:38,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23928458] [2021-11-20 05:37:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:38,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:37:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:37:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 05:37:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:37:38,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23928458] [2021-11-20 05:37:38,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23928458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:38,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515952110] [2021-11-20 05:37:38,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:38,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:38,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:38,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:37:38,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:37:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:37:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 05:37:38,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 05:37:38,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515952110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:38,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:38,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-11-20 05:37:38,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85776733] [2021-11-20 05:37:38,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:38,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:37:38,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:37:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:37:38,933 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 05:37:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:38,986 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-11-20 05:37:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:37:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-11-20 05:37:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:38,992 INFO L225 Difference]: With dead ends: 68 [2021-11-20 05:37:38,992 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 05:37:38,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:37:38,996 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:38,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 05:37:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-20 05:37:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-20 05:37:39,014 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 62 [2021-11-20 05:37:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:39,016 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-20 05:37:39,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 05:37:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-20 05:37:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 05:37:39,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:39,019 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:39,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:39,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:37:39,241 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash -50192777, now seen corresponding path program 3 times [2021-11-20 05:37:39,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:39,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842394158] [2021-11-20 05:37:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:39,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:37:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 05:37:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 05:37:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:37:39,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:39,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842394158] [2021-11-20 05:37:39,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842394158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:39,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162038915] [2021-11-20 05:37:39,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:37:39,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:39,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:39,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:39,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:37:39,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:37:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:37:39,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:37:39,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:37:39,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162038915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:39,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:39,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-11-20 05:37:39,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047179598] [2021-11-20 05:37:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:39,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:37:39,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:37:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:37:39,821 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:37:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:39,861 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-11-20 05:37:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:37:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2021-11-20 05:37:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:39,865 INFO L225 Difference]: With dead ends: 80 [2021-11-20 05:37:39,865 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 05:37:39,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:37:39,866 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:39,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 05:37:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 05:37:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-11-20 05:37:39,871 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 66 [2021-11-20 05:37:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-11-20 05:37:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:37:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-11-20 05:37:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 05:37:39,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:39,873 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:39,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:40,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:40,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash -135945016, now seen corresponding path program 4 times [2021-11-20 05:37:40,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:40,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201788545] [2021-11-20 05:37:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:40,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:37:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:37:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 05:37:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-20 05:37:40,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201788545] [2021-11-20 05:37:40,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201788545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140179062] [2021-11-20 05:37:40,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:37:40,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:40,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:40,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:37:40,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:37:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:37:40,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 230 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-20 05:37:40,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-20 05:37:40,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140179062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:40,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:40,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-11-20 05:37:40,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194682596] [2021-11-20 05:37:40,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:40,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:37:40,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:37:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:37:40,760 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 05:37:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:40,795 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-20 05:37:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 102 [2021-11-20 05:37:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:40,797 INFO L225 Difference]: With dead ends: 88 [2021-11-20 05:37:40,797 INFO L226 Difference]: Without dead ends: 57 [2021-11-20 05:37:40,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:37:40,799 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:40,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-20 05:37:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-20 05:37:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:37:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-20 05:37:40,806 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 102 [2021-11-20 05:37:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:40,807 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-20 05:37:40,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 05:37:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-20 05:37:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:37:40,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:40,809 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:40,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:41,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885060, now seen corresponding path program 5 times [2021-11-20 05:37:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6333196] [2021-11-20 05:37:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:41,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:37:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:37:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 05:37:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 13 proven. 379 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-20 05:37:41,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:41,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6333196] [2021-11-20 05:37:41,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6333196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:41,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665835072] [2021-11-20 05:37:41,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:37:41,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:41,855 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:41,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:37:42,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-20 05:37:42,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 05:37:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:42,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:37:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:37:42,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:37:42,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 05:37:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:37:44,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:37:44,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-11-20 05:37:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 243 proven. 196 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 05:37:45,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 105 proven. 306 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 05:37:47,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665835072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:47,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:47,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 21] total 53 [2021-11-20 05:37:47,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108374635] [2021-11-20 05:37:47,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:47,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 05:37:47,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 05:37:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2408, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 05:37:47,367 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 53 states, 51 states have (on average 2.588235294117647) internal successors, (132), 50 states have internal predecessors, (132), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 05:37:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:49,775 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2021-11-20 05:37:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 05:37:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.588235294117647) internal successors, (132), 50 states have internal predecessors, (132), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 106 [2021-11-20 05:37:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:49,783 INFO L225 Difference]: With dead ends: 187 [2021-11-20 05:37:49,783 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 05:37:49,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 210 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=939, Invalid=4913, Unknown=0, NotChecked=0, Total=5852 [2021-11-20 05:37:49,796 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 646 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:49,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 543 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 208 Invalid, 0 Unknown, 646 Unchecked, 0.2s Time] [2021-11-20 05:37:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 05:37:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-11-20 05:37:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 05:37:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-11-20 05:37:49,830 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 106 [2021-11-20 05:37:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:49,833 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-11-20 05:37:49,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.588235294117647) internal successors, (132), 50 states have internal predecessors, (132), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 05:37:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-11-20 05:37:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:37:49,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:49,839 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:49,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 05:37:50,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:50,055 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:37:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:50,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1737382458, now seen corresponding path program 1 times [2021-11-20 05:37:50,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:50,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562200844] [2021-11-20 05:37:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:37:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:37:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:51,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 05:37:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 114 proven. 347 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:37:51,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:51,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562200844] [2021-11-20 05:37:51,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562200844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:51,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970096812] [2021-11-20 05:37:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:51,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:51,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:51,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:51,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:37:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 05:37:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:52,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:37:53,500 INFO L354 Elim1Store]: treesize reduction 334, result has 11.4 percent of original size [2021-11-20 05:37:53,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 67 [2021-11-20 05:37:54,914 INFO L354 Elim1Store]: treesize reduction 340, result has 12.4 percent of original size [2021-11-20 05:37:54,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 77 [2021-11-20 05:37:55,299 INFO L354 Elim1Store]: treesize reduction 450, result has 9.3 percent of original size [2021-11-20 05:37:55,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 97 treesize of output 75 [2021-11-20 05:37:55,652 INFO L354 Elim1Store]: treesize reduction 334, result has 10.5 percent of original size [2021-11-20 05:37:55,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 104 treesize of output 68 [2021-11-20 05:37:56,020 INFO L354 Elim1Store]: treesize reduction 305, result has 9.2 percent of original size [2021-11-20 05:37:56,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 58 [2021-11-20 05:37:56,203 INFO L354 Elim1Store]: treesize reduction 150, result has 15.7 percent of original size [2021-11-20 05:37:56,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 49 [2021-11-20 05:38:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 8 proven. 447 refuted. 21 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 05:38:00,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:03,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970096812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:03,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:38:03,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 44] total 74 [2021-11-20 05:38:03,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351786248] [2021-11-20 05:38:03,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:03,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-20 05:38:03,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-20 05:38:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=8154, Unknown=1, NotChecked=0, Total=8556 [2021-11-20 05:38:03,178 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 74 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:38:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:11,037 INFO L93 Difference]: Finished difference Result 355 states and 463 transitions. [2021-11-20 05:38:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-20 05:38:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 106 [2021-11-20 05:38:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:11,047 INFO L225 Difference]: With dead ends: 355 [2021-11-20 05:38:11,048 INFO L226 Difference]: Without dead ends: 339 [2021-11-20 05:38:11,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6895 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1132, Invalid=22429, Unknown=1, NotChecked=0, Total=23562 [2021-11-20 05:38:11,058 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 93 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1555 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:11,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 964 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1335 Invalid, 0 Unknown, 1555 Unchecked, 1.0s Time] [2021-11-20 05:38:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-20 05:38:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 271. [2021-11-20 05:38:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 252 states have (on average 1.1984126984126984) internal successors, (302), 255 states have internal predecessors, (302), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2021-11-20 05:38:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2021-11-20 05:38:11,145 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 106 [2021-11-20 05:38:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:11,146 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2021-11-20 05:38:11,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:38:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2021-11-20 05:38:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:38:11,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:11,150 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:11,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:11,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:11,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2130409468, now seen corresponding path program 2 times [2021-11-20 05:38:11,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:11,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169833058] [2021-11-20 05:38:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:11,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:38:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:13,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:38:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 05:38:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 3 proven. 502 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:38:15,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169833058] [2021-11-20 05:38:15,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169833058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198802207] [2021-11-20 05:38:15,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:15,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:15,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:15,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:15,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:38:15,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:38:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-20 05:38:15,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:15,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 05:39:13,823 INFO L354 Elim1Store]: treesize reduction 294, result has 10.6 percent of original size [2021-11-20 05:39:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 67 [2021-11-20 05:39:23,922 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-11-20 05:39:23,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 76 [2021-11-20 05:39:24,355 INFO L354 Elim1Store]: treesize reduction 394, result has 10.5 percent of original size [2021-11-20 05:39:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 115 treesize of output 82 [2021-11-20 05:39:24,777 INFO L354 Elim1Store]: treesize reduction 309, result has 9.1 percent of original size [2021-11-20 05:39:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 67 [2021-11-20 05:39:25,233 INFO L354 Elim1Store]: treesize reduction 150, result has 15.7 percent of original size [2021-11-20 05:39:25,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 105 treesize of output 62 [2021-11-20 05:39:25,497 INFO L354 Elim1Store]: treesize reduction 150, result has 15.7 percent of original size [2021-11-20 05:39:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 99 treesize of output 62 [2021-11-20 05:39:44,584 INFO L354 Elim1Store]: treesize reduction 96, result has 55.8 percent of original size [2021-11-20 05:39:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 180 [2021-11-20 05:39:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 1 proven. 516 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:39:45,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 20 proven. 466 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:40:43,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198802207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:40:43,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:40:43,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 61, 49] total 163 [2021-11-20 05:40:43,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644363496] [2021-11-20 05:40:43,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:40:43,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-20 05:40:43,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:40:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-20 05:40:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=25346, Unknown=46, NotChecked=0, Total=26406 [2021-11-20 05:40:43,535 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 163 states, 159 states have (on average 1.6855345911949686) internal successors, (268), 151 states have internal predecessors, (268), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:42:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:46,382 INFO L93 Difference]: Finished difference Result 586 states and 812 transitions. [2021-11-20 05:42:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-20 05:42:46,383 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 159 states have (on average 1.6855345911949686) internal successors, (268), 151 states have internal predecessors, (268), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 106 [2021-11-20 05:42:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:46,390 INFO L225 Difference]: With dead ends: 586 [2021-11-20 05:42:46,390 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 05:42:46,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19001 ImplicationChecksByTransitivity, 263.1s TimeCoverageRelationStatistics Valid=2267, Invalid=57437, Unknown=76, NotChecked=0, Total=59780 [2021-11-20 05:42:46,400 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:46,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1017 Invalid, 3597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2870 Invalid, 0 Unknown, 613 Unchecked, 4.5s Time] [2021-11-20 05:42:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 05:42:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 487. [2021-11-20 05:42:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 452 states have (on average 1.2123893805309736) internal successors, (548), 463 states have internal predecessors, (548), 16 states have call successors, (16), 9 states have call predecessors, (16), 18 states have return successors, (94), 14 states have call predecessors, (94), 16 states have call successors, (94) [2021-11-20 05:42:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 658 transitions. [2021-11-20 05:42:46,481 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 658 transitions. Word has length 106 [2021-11-20 05:42:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 658 transitions. [2021-11-20 05:42:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 159 states have (on average 1.6855345911949686) internal successors, (268), 151 states have internal predecessors, (268), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:42:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 658 transitions. [2021-11-20 05:42:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:42:46,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:46,498 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:46,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 05:42:46,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:42:46,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1546467588, now seen corresponding path program 3 times [2021-11-20 05:42:46,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:46,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301169897] [2021-11-20 05:42:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:46,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:47,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:42:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:42:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 05:42:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 114 proven. 347 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:42:48,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301169897] [2021-11-20 05:42:48,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301169897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572123578] [2021-11-20 05:42:48,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:42:48,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:48,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:48,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:48,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:42:48,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-20 05:42:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:48,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 05:42:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:51,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:42:51,303 INFO L354 Elim1Store]: treesize reduction 380, result has 9.3 percent of original size [2021-11-20 05:42:51,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 105 treesize of output 93 [2021-11-20 05:42:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:51,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:42:51,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:51,642 INFO L354 Elim1Store]: treesize reduction 301, result has 10.7 percent of original size [2021-11-20 05:42:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 97 treesize of output 93 [2021-11-20 05:42:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:42:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,082 INFO L354 Elim1Store]: treesize reduction 325, result has 5.2 percent of original size [2021-11-20 05:42:52,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 99 treesize of output 77 [2021-11-20 05:42:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:52,560 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-11-20 05:42:52,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 89 treesize of output 63 [2021-11-20 05:42:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:53,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:42:53,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 49 [2021-11-20 05:42:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 270 proven. 171 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:42:55,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:55,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572123578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:55,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:42:55,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 42] total 73 [2021-11-20 05:42:55,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832020284] [2021-11-20 05:42:55,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:55,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-20 05:42:55,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-20 05:42:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 05:42:55,435 INFO L87 Difference]: Start difference. First operand 487 states and 658 transitions. Second operand has 73 states, 71 states have (on average 1.8028169014084507) internal successors, (128), 70 states have internal predecessors, (128), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:43:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:12,012 INFO L93 Difference]: Finished difference Result 1142 states and 1679 transitions. [2021-11-20 05:43:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-20 05:43:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.8028169014084507) internal successors, (128), 70 states have internal predecessors, (128), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 106 [2021-11-20 05:43:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:12,025 INFO L225 Difference]: With dead ends: 1142 [2021-11-20 05:43:12,025 INFO L226 Difference]: Without dead ends: 1084 [2021-11-20 05:43:12,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8496 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1239, Invalid=23564, Unknown=3, NotChecked=0, Total=24806 [2021-11-20 05:43:12,032 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1076 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:12,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 659 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 717 Invalid, 0 Unknown, 1076 Unchecked, 0.6s Time] [2021-11-20 05:43:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-11-20 05:43:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 885. [2021-11-20 05:43:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 828 states have (on average 1.2367149758454106) internal successors, (1024), 853 states have internal predecessors, (1024), 26 states have call successors, (26), 11 states have call predecessors, (26), 30 states have return successors, (247), 20 states have call predecessors, (247), 26 states have call successors, (247) [2021-11-20 05:43:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1297 transitions. [2021-11-20 05:43:12,185 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1297 transitions. Word has length 106 [2021-11-20 05:43:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:12,186 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1297 transitions. [2021-11-20 05:43:12,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.8028169014084507) internal successors, (128), 70 states have internal predecessors, (128), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:43:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1297 transitions. [2021-11-20 05:43:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:43:12,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:12,227 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:43:12,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:43:12,439 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:43:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1153440578, now seen corresponding path program 4 times [2021-11-20 05:43:12,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655565368] [2021-11-20 05:43:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:12,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:13,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:43:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:43:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 05:43:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 119 proven. 345 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 05:43:14,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:43:14,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655565368] [2021-11-20 05:43:14,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655565368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:43:14,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423785543] [2021-11-20 05:43:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:43:14,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:43:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:14,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:43:14,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:43:14,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:43:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:43:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-20 05:43:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:15,570 INFO L354 Elim1Store]: treesize reduction 141, result has 18.0 percent of original size [2021-11-20 05:43:15,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 47 [2021-11-20 05:43:15,777 INFO L354 Elim1Store]: treesize reduction 286, result has 11.7 percent of original size [2021-11-20 05:43:15,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 57 [2021-11-20 05:43:16,018 INFO L354 Elim1Store]: treesize reduction 309, result has 9.1 percent of original size [2021-11-20 05:43:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 50 [2021-11-20 05:43:16,242 INFO L354 Elim1Store]: treesize reduction 228, result has 8.8 percent of original size [2021-11-20 05:43:16,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 47 [2021-11-20 05:43:16,385 INFO L354 Elim1Store]: treesize reduction 98, result has 17.6 percent of original size [2021-11-20 05:43:16,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 44 [2021-11-20 05:44:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 104 proven. 412 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:44:01,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:10,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_48| Int)) (or (<= 4 |v_ULTIMATE.start_main_~i~2#1_48|) (< |v_ULTIMATE.start_main_~i~2#1_48| (+ |c_ULTIMATE.start_main_~i~2#1| 1)) (let ((.cse0 (let ((.cse1 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse4 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store .cse3 (+ .cse4 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse3 (+ .cse4 4 |c_ULTIMATE.start_main_~#x~0#1.offset|))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_48| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (< (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)) (select .cse0 (+ 12 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) is different from false [2021-11-20 05:44:11,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_48| Int)) (or (<= 4 |v_ULTIMATE.start_main_~i~2#1_48|) (let ((.cse0 (let ((.cse1 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse4 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store .cse3 (+ .cse4 4 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse3 (+ .cse4 8 |c_ULTIMATE.start_main_~#x~0#1.offset|))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_48| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (< (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)) (select .cse0 (+ 12 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (< |v_ULTIMATE.start_main_~i~2#1_48| (+ 2 |c_ULTIMATE.start_main_~i~2#1|)))) is different from false [2021-11-20 05:44:47,088 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_48| Int)) (or (< |v_ULTIMATE.start_main_~i~2#1_48| (+ 3 |c_ULTIMATE.start_main_~i~2#1|)) (<= 4 |v_ULTIMATE.start_main_~i~2#1_48|) (let ((.cse0 (let ((.cse1 (let ((.cse5 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (let ((.cse4 (+ .cse5 8 |c_ULTIMATE.start_main_~#x~0#1.offset|))) (let ((.cse3 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|))) (store .cse6 (+ .cse5 4 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse6 .cse4))))) (store .cse3 .cse4 (select .cse3 (+ .cse5 12 |c_ULTIMATE.start_main_~#x~0#1.offset|))))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_48| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (< (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)) (select .cse0 (+ 12 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) is different from false [2021-11-20 05:44:49,117 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_48| Int)) (or (let ((.cse0 (let ((.cse1 (let ((.cse5 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (let ((.cse4 (+ .cse5 8 |c_ULTIMATE.start_main_~#x~0#1.offset|))) (let ((.cse3 (let ((.cse7 (+ .cse5 4 |c_ULTIMATE.start_main_~#x~0#1.offset|))) (let ((.cse6 (let ((.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|))) (store .cse8 (+ .cse5 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse8 .cse7))))) (store .cse6 .cse7 (select .cse6 .cse4)))))) (store .cse3 .cse4 (select .cse3 (+ .cse5 12 |c_ULTIMATE.start_main_~#x~0#1.offset|))))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_48| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (< (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)) (select .cse0 (+ 12 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (< |v_ULTIMATE.start_main_~i~2#1_48| (+ 3 |c_ULTIMATE.start_main_~i~2#1|)) (<= 4 |v_ULTIMATE.start_main_~i~2#1_48|))) is different from false [2021-11-20 05:44:50,448 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_48| Int)) (or (let ((.cse2 (+ 12 |c_ULTIMATE.start_main_~#x~0#1.offset|)) (.cse1 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|))) (let ((.cse0 (let ((.cse3 (let ((.cse5 (let ((.cse7 (+ 4 |c_ULTIMATE.start_main_~#x~0#1.offset|))) (let ((.cse6 (let ((.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|))) (store .cse8 |c_ULTIMATE.start_main_~#x~0#1.offset| (select .cse8 .cse7))))) (store .cse6 .cse7 (select .cse6 .cse1)))))) (store .cse5 .cse1 (select .cse5 .cse2)))) (.cse4 (* |v_ULTIMATE.start_main_~i~2#1_48| 4))) (store .cse3 (+ .cse4 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse3 (+ .cse4 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (< (select .cse0 .cse1) (select .cse0 .cse2)))) (<= 4 |v_ULTIMATE.start_main_~i~2#1_48|) (< |v_ULTIMATE.start_main_~i~2#1_48| 3))) is different from false [2021-11-20 05:44:50,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 345 treesize of output 277 [2021-11-20 05:44:50,638 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-11-20 05:44:50,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93359 treesize of output 1 [2021-11-20 05:44:52,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_48| Int)) (or (<= 4 |v_ULTIMATE.start_main_~i~2#1_48|) (< |v_ULTIMATE.start_main_~i~2#1_48| 3) (let ((.cse2 (+ |c_max_#in~x.offset| 12)) (.cse1 (+ |c_max_#in~x.offset| 8))) (let ((.cse0 (let ((.cse3 (let ((.cse5 (let ((.cse7 (+ |c_max_#in~x.offset| 4))) (let ((.cse6 (let ((.cse8 (select |c_#memory_int| |c_max_#in~x.base|))) (store .cse8 |c_max_#in~x.offset| (select .cse8 .cse7))))) (store .cse6 .cse7 (select .cse6 .cse1)))))) (store .cse5 .cse1 (select .cse5 .cse2)))) (.cse4 (* |v_ULTIMATE.start_main_~i~2#1_48| 4))) (store .cse3 (+ |c_max_#in~x.offset| .cse4) (select .cse3 (+ |c_max_#in~x.offset| .cse4 4)))))) (< (select .cse0 .cse1) (select .cse0 .cse2)))))) is different from false [2021-11-20 05:45:00,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:45:00,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 290 [2021-11-20 05:45:00,668 INFO L354 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2021-11-20 05:45:00,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 775390 treesize of output 596446 [2021-11-20 05:45:36,672 WARN L227 SmtUtils]: Spent 36.00s on a formula simplification. DAG size of input: 586 DAG size of output: 532 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 05:45:37,642 INFO L354 Elim1Store]: treesize reduction 105, result has 52.5 percent of original size [2021-11-20 05:45:37,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 173471 treesize of output 132997 [2021-11-20 05:45:45,277 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 600 DAG size of output: 540 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 05:45:45,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 05:45:45,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:45:45,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-20 05:45:45,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086439422] [2021-11-20 05:45:45,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:45,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:45:45,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:45,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:45:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=5767, Unknown=43, NotChecked=954, Total=7140 [2021-11-20 05:45:45,286 INFO L87 Difference]: Start difference. First operand 885 states and 1297 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:47:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:16,898 INFO L93 Difference]: Finished difference Result 1712 states and 2577 transitions. [2021-11-20 05:47:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 05:47:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 106 [2021-11-20 05:47:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:16,915 INFO L225 Difference]: With dead ends: 1712 [2021-11-20 05:47:16,915 INFO L226 Difference]: Without dead ends: 1373 [2021-11-20 05:47:16,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 118 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 194.6s TimeCoverageRelationStatistics Valid=909, Invalid=11906, Unknown=91, NotChecked=1374, Total=14280 [2021-11-20 05:47:16,926 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:16,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 514 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 05:47:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-11-20 05:47:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1199. [2021-11-20 05:47:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1131 states have (on average 1.2502210433244916) internal successors, (1414), 1165 states have internal predecessors, (1414), 22 states have call successors, (22), 12 states have call predecessors, (22), 45 states have return successors, (313), 21 states have call predecessors, (313), 22 states have call successors, (313) [2021-11-20 05:47:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1749 transitions. [2021-11-20 05:47:17,119 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1749 transitions. Word has length 106 [2021-11-20 05:47:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1749 transitions. [2021-11-20 05:47:17,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:47:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1749 transitions. [2021-11-20 05:47:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:47:17,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:17,135 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:17,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:17,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:47:17,351 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:47:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash 170413122, now seen corresponding path program 5 times [2021-11-20 05:47:17,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:17,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377066377] [2021-11-20 05:47:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:17,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:47:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:47:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 05:47:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 119 proven. 348 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 05:47:19,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:19,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377066377] [2021-11-20 05:47:19,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377066377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:19,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004674744] [2021-11-20 05:47:19,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:47:19,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:19,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:19,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:19,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6019bfa3-0023-4da1-b0d5-c1c13e4c5454/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:47:19,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-20 05:47:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 05:47:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:19,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:47:19,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:47:19,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 05:47:19,640 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:47:19,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2021-11-20 05:47:20,131 INFO L354 Elim1Store]: treesize reduction 141, result has 18.0 percent of original size [2021-11-20 05:47:20,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 47 [2021-11-20 05:47:20,296 INFO L354 Elim1Store]: treesize reduction 290, result has 12.9 percent of original size [2021-11-20 05:47:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 62 treesize of output 62 [2021-11-20 05:47:20,454 INFO L354 Elim1Store]: treesize reduction 225, result has 10.0 percent of original size [2021-11-20 05:47:20,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 44 [2021-11-20 05:47:20,622 INFO L354 Elim1Store]: treesize reduction 204, result has 18.4 percent of original size [2021-11-20 05:47:20,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 68 [2021-11-20 05:47:22,532 INFO L354 Elim1Store]: treesize reduction 273, result has 18.8 percent of original size [2021-11-20 05:47:22,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 92 [2021-11-20 05:48:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 252 proven. 220 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:48:19,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:30,496 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_56| Int)) (or (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_56| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (<= (+ (select .cse0 (+ 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)) 1) (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (< |v_ULTIMATE.start_main_~i~2#1_56| (+ |c_ULTIMATE.start_main_~i~2#1| 1)))) is different from false [2021-11-20 05:48:31,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_56| Int)) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse4 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store .cse3 (+ .cse4 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse3 (+ .cse4 4 |c_ULTIMATE.start_main_~#x~0#1.offset|))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_56| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (<= (+ (select .cse0 (+ 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)) 1) (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (< |v_ULTIMATE.start_main_~i~2#1_56| (+ |c_ULTIMATE.start_main_~i~2#1| 1)))) is different from false [2021-11-20 05:48:33,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_56| Int)) (or (< |v_ULTIMATE.start_main_~i~2#1_56| (+ 2 |c_ULTIMATE.start_main_~i~2#1|)) (let ((.cse0 (let ((.cse1 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse4 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store .cse3 (+ .cse4 4 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse3 (+ .cse4 8 |c_ULTIMATE.start_main_~#x~0#1.offset|))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_56| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (<= (+ (select .cse0 (+ 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)) 1) (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) is different from false [2021-11-20 05:48:34,785 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_56| Int)) (or (let ((.cse0 (let ((.cse1 (let ((.cse5 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (let ((.cse4 (+ .cse5 4 |c_ULTIMATE.start_main_~#x~0#1.offset|))) (let ((.cse3 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|))) (store .cse6 (+ .cse5 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse6 .cse4))))) (store .cse3 .cse4 (select .cse3 (+ .cse5 8 |c_ULTIMATE.start_main_~#x~0#1.offset|))))))) (.cse2 (* |v_ULTIMATE.start_main_~i~2#1_56| 4))) (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#x~0#1.offset|) (select .cse1 (+ .cse2 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)))))) (<= (+ (select .cse0 (+ 4 |c_ULTIMATE.start_main_~#x~0#1.offset|)) 1) (select .cse0 (+ 8 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (< |v_ULTIMATE.start_main_~i~2#1_56| (+ 2 |c_ULTIMATE.start_main_~i~2#1|)))) is different from false [2021-11-20 05:49:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 289 proven. 144 refuted. 0 times theorem prover too weak. 76 trivial. 12 not checked. [2021-11-20 05:49:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004674744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:15,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:15,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 29] total 86 [2021-11-20 05:49:15,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865312453] [2021-11-20 05:49:15,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:15,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-20 05:49:15,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-20 05:49:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=6095, Unknown=46, NotChecked=652, Total=7310 [2021-11-20 05:49:15,335 INFO L87 Difference]: Start difference. First operand 1199 states and 1749 transitions. Second operand has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 84 states have internal predecessors, (181), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7)