./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y --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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:53:04,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:53:04,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:53:04,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:53:04,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:53:04,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:53:04,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:53:04,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:53:04,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:53:04,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:53:04,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:53:04,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:53:04,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:53:04,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:53:04,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:53:04,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:53:04,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:53:04,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:53:04,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:53:04,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:53:04,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:53:04,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:53:04,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:53:04,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:53:04,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:53:04,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:53:04,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:53:04,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:53:04,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:53:04,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:53:04,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:53:04,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:53:04,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:53:04,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:53:04,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:53:04,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:53:04,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:53:04,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:53:04,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:53:04,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:53:04,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:53:04,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:53:04,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:53:04,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:53:04,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:53:04,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:53:04,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:53:04,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:53:04,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:53:04,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:53:04,544 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:53:04,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:53:04,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:53:04,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:53:04,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:53:04,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:53:04,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:53:04,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:53:04,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:53:04,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:53:04,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:53:04,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:53:04,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:53:04,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:53:04,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:53:04,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:53:04,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:53:04,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:53:04,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:53:04,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:53:04,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:53:04,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:53:04,552 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:53:04,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:53:04,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:53:04,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:53:04,553 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_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2021-11-13 17:53:04,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:53:04,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:53:04,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:53:04,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:53:04,913 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:53:04,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-tiling/pnr3.c [2021-11-13 17:53:04,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/data/ab5684237/4bf6121ef90a46de858c802d2aa6b168/FLAG8191589c4 [2021-11-13 17:53:05,477 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:53:05,478 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/sv-benchmarks/c/array-tiling/pnr3.c [2021-11-13 17:53:05,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/data/ab5684237/4bf6121ef90a46de858c802d2aa6b168/FLAG8191589c4 [2021-11-13 17:53:05,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/data/ab5684237/4bf6121ef90a46de858c802d2aa6b168 [2021-11-13 17:53:05,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:53:05,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:53:05,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:53:05,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:53:05,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:53:05,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:53:05" (1/1) ... [2021-11-13 17:53:05,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388a2fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:05, skipping insertion in model container [2021-11-13 17:53:05,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:53:05" (1/1) ... [2021-11-13 17:53:05,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:53:05,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:53:06,054 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2021-11-13 17:53:06,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:53:06,110 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:53:06,122 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2021-11-13 17:53:06,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:53:06,144 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:53:06,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06 WrapperNode [2021-11-13 17:53:06,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:53:06,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:53:06,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:53:06,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:53:06,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:53:06,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:53:06,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:53:06,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:53:06,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:53:06,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:53:06,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:53:06,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:53:06,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (1/1) ... [2021-11-13 17:53:06,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:53:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:06,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:53:06,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:53:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:53:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:53:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:53:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:53:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-11-13 17:53:06,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-11-13 17:53:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:53:06,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:53:06,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:53:06,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:53:06,569 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 17:53:06,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:53:06 BoogieIcfgContainer [2021-11-13 17:53:06,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:53:06,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:53:06,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:53:06,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:53:06,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:53:05" (1/3) ... [2021-11-13 17:53:06,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762e985b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:53:06, skipping insertion in model container [2021-11-13 17:53:06,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:06" (2/3) ... [2021-11-13 17:53:06,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762e985b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:53:06, skipping insertion in model container [2021-11-13 17:53:06,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:53:06" (3/3) ... [2021-11-13 17:53:06,580 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2021-11-13 17:53:06,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:53:06,585 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:53:06,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:53:06,656 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 [2021-11-13 17:53:06,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:53:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 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) [2021-11-13 17:53:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:53:06,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:06,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:06,679 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2021-11-13 17:53:06,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:06,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007651476] [2021-11-13 17:53:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:06,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:06,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:06,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007651476] [2021-11-13 17:53:06,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007651476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:06,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:06,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:53:06,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351451065] [2021-11-13 17:53:06,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:06,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:53:06,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:53:06,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:53:06,963 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:06,990 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-11-13 17:53:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:53:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 17:53:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:06,999 INFO L225 Difference]: With dead ends: 57 [2021-11-13 17:53:07,000 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 17:53:07,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:53:07,009 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:07,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:53:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 17:53:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-13 17:53:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-13 17:53:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-13 17:53:07,054 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2021-11-13 17:53:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:07,054 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-13 17:53:07,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-13 17:53:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:53:07,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:07,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:07,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:53:07,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2021-11-13 17:53:07,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:07,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262042584] [2021-11-13 17:53:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:07,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:07,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:07,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262042584] [2021-11-13 17:53:07,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262042584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:07,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:07,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:53:07,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72892487] [2021-11-13 17:53:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:07,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:53:07,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:53:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:53:07,388 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:07,528 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-11-13 17:53:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:53:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 17:53:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:07,530 INFO L225 Difference]: With dead ends: 45 [2021-11-13 17:53:07,530 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 17:53:07,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:53:07,532 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.54ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:07,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 113.54ms Time] [2021-11-13 17:53:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 17:53:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-13 17:53:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-13 17:53:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-13 17:53:07,542 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-11-13 17:53:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:07,542 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-13 17:53:07,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-13 17:53:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 17:53:07,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:07,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:07,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:53:07,550 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2021-11-13 17:53:07,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:07,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950159640] [2021-11-13 17:53:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:07,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:07,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:07,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:07,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:07,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950159640] [2021-11-13 17:53:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950159640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:07,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201512591] [2021-11-13 17:53:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:07,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:07,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:07,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:53:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:53:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:08,171 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 21 treesize of output 17 [2021-11-13 17:53:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:08,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-11-13 17:53:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:08,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2021-11-13 17:53:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:08,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:08,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-13 17:53:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-13 17:53:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:08,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201512591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:08,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:08,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2021-11-13 17:53:08,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114666491] [2021-11-13 17:53:08,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:08,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:53:08,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:53:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:53:08,651 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 17:53:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:09,053 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2021-11-13 17:53:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 17:53:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2021-11-13 17:53:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:09,060 INFO L225 Difference]: With dead ends: 84 [2021-11-13 17:53:09,060 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 17:53:09,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:53:09,065 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 80 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 203.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.78ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:09,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 205 Invalid, 304 Unknown, 0 Unchecked, 12.78ms Time], IncrementalHoareTripleChecker [55 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 252.94ms Time] [2021-11-13 17:53:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 17:53:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2021-11-13 17:53:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 17:53:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-11-13 17:53:09,096 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2021-11-13 17:53:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:09,098 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-11-13 17:53:09,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 17:53:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-11-13 17:53:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 17:53:09,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:09,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:09,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:09,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:09,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2021-11-13 17:53:09,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:09,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126024511] [2021-11-13 17:53:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:09,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:09,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:09,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:09,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:09,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:09,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126024511] [2021-11-13 17:53:09,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126024511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:09,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16899311] [2021-11-13 17:53:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:09,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:09,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:09,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:53:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:09,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:53:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:09,797 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 20 treesize of output 16 [2021-11-13 17:53:09,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:09,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 17:53:10,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:10,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:53:10,130 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 37 treesize of output 29 [2021-11-13 17:53:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:53:10,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:10,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-13 17:53:10,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-11-13 17:53:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16899311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:10,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:10,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-11-13 17:53:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624289942] [2021-11-13 17:53:10,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:53:10,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:53:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:53:10,969 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-13 17:53:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:11,830 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2021-11-13 17:53:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 17:53:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2021-11-13 17:53:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:11,834 INFO L225 Difference]: With dead ends: 137 [2021-11-13 17:53:11,834 INFO L226 Difference]: Without dead ends: 135 [2021-11-13 17:53:11,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 17:53:11,836 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 147 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 376.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:11,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 394 Invalid, 604 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [137 Valid, 414 Invalid, 0 Unknown, 53 Unchecked, 376.75ms Time] [2021-11-13 17:53:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-13 17:53:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2021-11-13 17:53:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 17:53:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2021-11-13 17:53:11,852 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2021-11-13 17:53:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:11,853 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2021-11-13 17:53:11,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-13 17:53:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2021-11-13 17:53:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 17:53:11,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:11,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:11,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:12,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 17:53:12,080 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2021-11-13 17:53:12,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:12,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621146941] [2021-11-13 17:53:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:12,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:12,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:12,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:12,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:12,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:12,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621146941] [2021-11-13 17:53:12,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621146941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:12,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192585160] [2021-11-13 17:53:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:12,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:12,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:12,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:53:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:12,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 17:53:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:12,551 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 21 treesize of output 17 [2021-11-13 17:53:12,614 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:12,614 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 24 treesize of output 23 [2021-11-13 17:53:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:12,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:12,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 17:53:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:12,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192585160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:12,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2021-11-13 17:53:12,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817233633] [2021-11-13 17:53:12,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:12,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 17:53:12,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 17:53:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:53:12,908 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 17:53:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:13,400 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2021-11-13 17:53:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:53:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 35 [2021-11-13 17:53:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:13,403 INFO L225 Difference]: With dead ends: 202 [2021-11-13 17:53:13,403 INFO L226 Difference]: Without dead ends: 200 [2021-11-13 17:53:13,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:53:13,405 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.31ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 317.97ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:13,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 271 Invalid, 449 Unknown, 0 Unchecked, 6.31ms Time], IncrementalHoareTripleChecker [65 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 317.97ms Time] [2021-11-13 17:53:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-13 17:53:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2021-11-13 17:53:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 17:53:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2021-11-13 17:53:13,433 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2021-11-13 17:53:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:13,433 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2021-11-13 17:53:13,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 17:53:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2021-11-13 17:53:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 17:53:13,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:13,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:13,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:13,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:13,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2021-11-13 17:53:13,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:13,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883917246] [2021-11-13 17:53:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:13,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:13,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:13,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883917246] [2021-11-13 17:53:13,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883917246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:13,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278317674] [2021-11-13 17:53:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:13,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:13,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:13,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:13,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:53:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 17:53:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:14,135 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 20 treesize of output 16 [2021-11-13 17:53:14,269 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:14,270 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 23 treesize of output 22 [2021-11-13 17:53:14,378 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 41 treesize of output 29 [2021-11-13 17:53:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:53:14,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:16,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:16,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:53:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278317674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:16,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:16,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-11-13 17:53:16,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790013132] [2021-11-13 17:53:16,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:16,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 17:53:16,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 17:53:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2021-11-13 17:53:16,708 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-13 17:53:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:18,057 INFO L93 Difference]: Finished difference Result 318 states and 451 transitions. [2021-11-13 17:53:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 17:53:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2021-11-13 17:53:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:18,063 INFO L225 Difference]: With dead ends: 318 [2021-11-13 17:53:18,063 INFO L226 Difference]: Without dead ends: 316 [2021-11-13 17:53:18,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=380, Invalid=1875, Unknown=1, NotChecked=0, Total=2256 [2021-11-13 17:53:18,066 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 207 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 514.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.74ms SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 626.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:18,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 606 Invalid, 1007 Unknown, 0 Unchecked, 8.74ms Time], IncrementalHoareTripleChecker [218 Valid, 727 Invalid, 0 Unknown, 62 Unchecked, 626.51ms Time] [2021-11-13 17:53:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-13 17:53:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2021-11-13 17:53:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-13 17:53:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2021-11-13 17:53:18,136 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2021-11-13 17:53:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:18,136 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2021-11-13 17:53:18,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-13 17:53:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2021-11-13 17:53:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:53:18,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:18,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:18,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:18,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:18,340 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2021-11-13 17:53:18,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:18,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229862670] [2021-11-13 17:53:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:18,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:18,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:18,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:18,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:18,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229862670] [2021-11-13 17:53:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229862670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:18,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110760371] [2021-11-13 17:53:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:53:18,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:18,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:18,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:53:18,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:53:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:53:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:53:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:18,581 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 18 treesize of output 14 [2021-11-13 17:53:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:18,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:18,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 17:53:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110760371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:18,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:18,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-11-13 17:53:18,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255102305] [2021-11-13 17:53:18,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:18,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:53:18,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:53:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:53:18,819 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 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) [2021-11-13 17:53:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:19,402 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2021-11-13 17:53:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 17:53:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 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 39 [2021-11-13 17:53:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:19,409 INFO L225 Difference]: With dead ends: 629 [2021-11-13 17:53:19,409 INFO L226 Difference]: Without dead ends: 627 [2021-11-13 17:53:19,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-11-13 17:53:19,411 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 94 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 286.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.72ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 350.79ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:19,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 289 Invalid, 534 Unknown, 0 Unchecked, 6.72ms Time], IncrementalHoareTripleChecker [142 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 350.79ms Time] [2021-11-13 17:53:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-13 17:53:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2021-11-13 17:53:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-11-13 17:53:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2021-11-13 17:53:19,472 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2021-11-13 17:53:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:19,472 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2021-11-13 17:53:19,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 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) [2021-11-13 17:53:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2021-11-13 17:53:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:53:19,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:19,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:19,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:19,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 17:53:19,700 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2021-11-13 17:53:19,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:19,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792962981] [2021-11-13 17:53:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:19,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:19,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:19,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:19,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792962981] [2021-11-13 17:53:19,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792962981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:19,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599280801] [2021-11-13 17:53:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:19,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:19,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:19,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:53:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:53:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:20,102 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 [2021-11-13 17:53:20,288 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 41 treesize of output 29 [2021-11-13 17:53:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:20,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:20,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:53:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599280801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:20,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:20,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-11-13 17:53:20,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683354970] [2021-11-13 17:53:20,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:20,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 17:53:20,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 17:53:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:53:20,603 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 17:53:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:22,766 INFO L93 Difference]: Finished difference Result 1027 states and 1566 transitions. [2021-11-13 17:53:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 17:53:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 39 [2021-11-13 17:53:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:22,774 INFO L225 Difference]: With dead ends: 1027 [2021-11-13 17:53:22,775 INFO L226 Difference]: Without dead ends: 1025 [2021-11-13 17:53:22,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 17:53:22,779 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 217 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 790.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.11ms SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 981.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 656 Invalid, 1493 Unknown, 0 Unchecked, 12.11ms Time], IncrementalHoareTripleChecker [418 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 981.38ms Time] [2021-11-13 17:53:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-11-13 17:53:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 160. [2021-11-13 17:53:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-13 17:53:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2021-11-13 17:53:22,842 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2021-11-13 17:53:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:22,843 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2021-11-13 17:53:22,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 17:53:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2021-11-13 17:53:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:53:22,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:22,845 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:22,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:23,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:23,060 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2021-11-13 17:53:23,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:23,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225591386] [2021-11-13 17:53:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:23,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:23,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:23,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:23,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:23,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:23,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225591386] [2021-11-13 17:53:23,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225591386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:23,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815005023] [2021-11-13 17:53:23,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:53:23,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:23,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:23,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:23,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:53:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 17:53:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:53:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 17:53:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:23,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:53:24,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815005023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:24,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:24,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2021-11-13 17:53:24,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557792701] [2021-11-13 17:53:24,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:24,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 17:53:24,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 17:53:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-11-13 17:53:24,250 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 17:53:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:24,558 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2021-11-13 17:53:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:53:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2021-11-13 17:53:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:24,562 INFO L225 Difference]: With dead ends: 267 [2021-11-13 17:53:24,562 INFO L226 Difference]: Without dead ends: 247 [2021-11-13 17:53:24,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 17:53:24,566 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 136 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.70ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:24,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 114 Invalid, 268 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [62 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 177.70ms Time] [2021-11-13 17:53:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-13 17:53:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2021-11-13 17:53:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-13 17:53:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2021-11-13 17:53:24,598 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2021-11-13 17:53:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:24,599 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2021-11-13 17:53:24,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 17:53:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2021-11-13 17:53:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:53:24,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:24,603 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:24,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:24,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:24,828 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2021-11-13 17:53:24,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:24,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220442771] [2021-11-13 17:53:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:24,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:53:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:53:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:53:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:25,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:25,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220442771] [2021-11-13 17:53:25,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220442771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:25,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42601295] [2021-11-13 17:53:25,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:53:25,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:25,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:25,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:53:25,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:53:25,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:53:25,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 17:53:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:25,329 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 16 treesize of output 12 [2021-11-13 17:53:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:25,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 17:53:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:25,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 17:53:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:25,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:53:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:27,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:27,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:53:27,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2021-11-13 17:53:28,071 INFO L354 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-11-13 17:53:28,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2021-11-13 17:53:28,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 17:53:28,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:53:28,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-13 17:53:28,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492229951] [2021-11-13 17:53:28,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:28,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:53:28,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:53:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2021-11-13 17:53:28,162 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 17:53:28,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:28,402 INFO L93 Difference]: Finished difference Result 181 states and 255 transitions. [2021-11-13 17:53:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:53:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-11-13 17:53:28,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:28,407 INFO L225 Difference]: With dead ends: 181 [2021-11-13 17:53:28,407 INFO L226 Difference]: Without dead ends: 179 [2021-11-13 17:53:28,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=103, Invalid=402, Unknown=1, NotChecked=0, Total=506 [2021-11-13 17:53:28,409 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 66 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:28,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 103 Invalid, 149 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [52 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 105.05ms Time] [2021-11-13 17:53:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-13 17:53:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 93. [2021-11-13 17:53:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 75 states have internal predecessors, (93), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-13 17:53:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2021-11-13 17:53:28,439 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 51 [2021-11-13 17:53:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:28,439 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2021-11-13 17:53:28,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 17:53:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2021-11-13 17:53:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 17:53:28,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:28,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:28,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:28,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2021-11-13 17:53:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023797996] [2021-11-13 17:53:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:28,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:28,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:28,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:29,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:53:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:29,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:53:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:53:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:29,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:29,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023797996] [2021-11-13 17:53:29,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023797996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:29,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83540554] [2021-11-13 17:53:29,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:53:29,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:29,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:29,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:53:29,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:53:29,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:53:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:53:29,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:29,249 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 16 treesize of output 12 [2021-11-13 17:53:29,373 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:53:29,373 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 29 treesize of output 28 [2021-11-13 17:53:29,494 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 17:53:29,494 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 26 treesize of output 25 [2021-11-13 17:53:29,589 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 17:53:29,589 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 32 treesize of output 25 [2021-11-13 17:53:29,958 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-13 17:53:29,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-11-13 17:53:32,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 17:53:32,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:53:32,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-13 17:53:32,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558413051] [2021-11-13 17:53:32,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:32,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:53:32,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:53:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=288, Unknown=1, NotChecked=0, Total=342 [2021-11-13 17:53:32,156 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 17:53:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:32,606 INFO L93 Difference]: Finished difference Result 121 states and 164 transitions. [2021-11-13 17:53:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:53:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2021-11-13 17:53:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:32,608 INFO L225 Difference]: With dead ends: 121 [2021-11-13 17:53:32,609 INFO L226 Difference]: Without dead ends: 119 [2021-11-13 17:53:32,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=125, Invalid=576, Unknown=1, NotChecked=0, Total=702 [2021-11-13 17:53:32,611 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 103 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.13ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:32,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 129 Invalid, 271 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [111 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 223.13ms Time] [2021-11-13 17:53:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-13 17:53:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 60. [2021-11-13 17:53:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 49 states have internal predecessors, (56), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 17:53:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-11-13 17:53:32,631 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 55 [2021-11-13 17:53:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:32,631 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-11-13 17:53:32,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 17:53:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-11-13 17:53:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 17:53:32,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:32,633 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:32,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:32,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:32,848 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2021-11-13 17:53:32,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:32,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515754940] [2021-11-13 17:53:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:32,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:53:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:53:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:53:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:33,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:33,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515754940] [2021-11-13 17:53:33,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515754940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:33,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500101602] [2021-11-13 17:53:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 17:53:33,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:33,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:33,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:53:33,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 17:53:33,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:53:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 17:53:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:33,441 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 21 treesize of output 17 [2021-11-13 17:53:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-11-13 17:53:33,562 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:53:33,563 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 44 treesize of output 43 [2021-11-13 17:53:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:33,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:33,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 17:53:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:34,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500101602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:34,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:34,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2021-11-13 17:53:34,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375151392] [2021-11-13 17:53:34,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:34,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:53:34,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:53:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:53:34,091 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-13 17:53:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:36,032 INFO L93 Difference]: Finished difference Result 388 states and 570 transitions. [2021-11-13 17:53:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-13 17:53:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 63 [2021-11-13 17:53:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:36,035 INFO L225 Difference]: With dead ends: 388 [2021-11-13 17:53:36,035 INFO L226 Difference]: Without dead ends: 386 [2021-11-13 17:53:36,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=641, Invalid=3391, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 17:53:36,038 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 223 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 918.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.47ms SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1121.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:36,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 811 Invalid, 1949 Unknown, 0 Unchecked, 11.47ms Time], IncrementalHoareTripleChecker [454 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 1121.26ms Time] [2021-11-13 17:53:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-13 17:53:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 90. [2021-11-13 17:53:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 72 states have internal predecessors, (88), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 17:53:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2021-11-13 17:53:36,070 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 63 [2021-11-13 17:53:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:36,071 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2021-11-13 17:53:36,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-13 17:53:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2021-11-13 17:53:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 17:53:36,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:36,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:36,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:36,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:36,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2021-11-13 17:53:36,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:36,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773802322] [2021-11-13 17:53:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:36,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:53:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:53:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:53:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:36,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:36,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773802322] [2021-11-13 17:53:36,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773802322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:36,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867531003] [2021-11-13 17:53:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:36,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:36,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:36,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:36,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:53:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 17:53:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:37,051 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 20 treesize of output 16 [2021-11-13 17:53:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 17:53:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 17:53:37,537 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 37 treesize of output 29 [2021-11-13 17:53:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 17:53:37,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:38,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:53:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:38,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867531003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:38,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:38,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2021-11-13 17:53:38,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51881131] [2021-11-13 17:53:38,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:38,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 17:53:38,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 17:53:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-13 17:53:38,575 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-13 17:53:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:42,356 INFO L93 Difference]: Finished difference Result 394 states and 538 transitions. [2021-11-13 17:53:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-13 17:53:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 63 [2021-11-13 17:53:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:42,359 INFO L225 Difference]: With dead ends: 394 [2021-11-13 17:53:42,360 INFO L226 Difference]: Without dead ends: 392 [2021-11-13 17:53:42,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 118 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=938, Invalid=7434, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 17:53:42,366 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 330 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1430.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.93ms SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 1730.04ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:42,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1403 Invalid, 3103 Unknown, 0 Unchecked, 15.93ms Time], IncrementalHoareTripleChecker [517 Valid, 2380 Invalid, 0 Unknown, 206 Unchecked, 1730.04ms Time] [2021-11-13 17:53:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-13 17:53:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 104. [2021-11-13 17:53:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.275) internal successors, (102), 82 states have internal predecessors, (102), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-13 17:53:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2021-11-13 17:53:42,419 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 63 [2021-11-13 17:53:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:42,420 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2021-11-13 17:53:42,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-13 17:53:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2021-11-13 17:53:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 17:53:42,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:42,421 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:42,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:42,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 17:53:42,636 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2021-11-13 17:53:42,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:42,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103862337] [2021-11-13 17:53:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:42,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:53:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:53:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:53:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:42,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:42,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103862337] [2021-11-13 17:53:42,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103862337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:42,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834102696] [2021-11-13 17:53:42,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 17:53:42,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:42,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:42,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:42,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 17:53:42,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-13 17:53:42,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:53:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 17:53:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:43,054 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 21 treesize of output 17 [2021-11-13 17:53:43,093 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:53:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-13 17:53:43,320 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-13 17:53:43,320 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 55 treesize of output 33 [2021-11-13 17:53:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:43,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:43,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:43,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 17:53:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:43,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834102696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:43,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:43,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-11-13 17:53:43,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445160893] [2021-11-13 17:53:43,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:43,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 17:53:43,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 17:53:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-13 17:53:43,604 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-13 17:53:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:46,596 INFO L93 Difference]: Finished difference Result 924 states and 1397 transitions. [2021-11-13 17:53:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-13 17:53:46,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-11-13 17:53:46,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:46,604 INFO L225 Difference]: With dead ends: 924 [2021-11-13 17:53:46,604 INFO L226 Difference]: Without dead ends: 922 [2021-11-13 17:53:46,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 135 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2021-11-13 17:53:46,608 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 143 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1448.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.18ms SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1777.29ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:46,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1336 Invalid, 3217 Unknown, 0 Unchecked, 12.18ms Time], IncrementalHoareTripleChecker [402 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 1777.29ms Time] [2021-11-13 17:53:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-11-13 17:53:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 215. [2021-11-13 17:53:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 166 states have (on average 1.3373493975903614) internal successors, (222), 168 states have internal predecessors, (222), 44 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-13 17:53:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 310 transitions. [2021-11-13 17:53:46,708 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 310 transitions. Word has length 67 [2021-11-13 17:53:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:46,708 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 310 transitions. [2021-11-13 17:53:46,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-13 17:53:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 310 transitions. [2021-11-13 17:53:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 17:53:46,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:46,712 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:46,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:46,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:46,940 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2021-11-13 17:53:46,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:46,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650818438] [2021-11-13 17:53:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:46,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:53:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:53:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:53:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:47,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:47,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650818438] [2021-11-13 17:53:47,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650818438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:47,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988265734] [2021-11-13 17:53:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:47,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:47,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:47,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 17:53:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 17:53:47,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:47,512 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 20 treesize of output 16 [2021-11-13 17:53:47,634 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:47,634 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 23 treesize of output 22 [2021-11-13 17:53:47,879 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 41 treesize of output 29 [2021-11-13 17:53:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 17:53:47,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:50,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:53:50,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:53:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:53:50,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988265734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:50,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:53:50,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-11-13 17:53:50,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676101648] [2021-11-13 17:53:50,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:50,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 17:53:50,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 17:53:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2021-11-13 17:53:50,377 INFO L87 Difference]: Start difference. First operand 215 states and 310 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-13 17:54:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:10,874 INFO L93 Difference]: Finished difference Result 918 states and 1333 transitions. [2021-11-13 17:54:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-13 17:54:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 67 [2021-11-13 17:54:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:10,883 INFO L225 Difference]: With dead ends: 918 [2021-11-13 17:54:10,884 INFO L226 Difference]: Without dead ends: 916 [2021-11-13 17:54:10,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4574 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1567, Invalid=11534, Unknown=9, NotChecked=0, Total=13110 [2021-11-13 17:54:10,894 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 533 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 2972 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1646.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.25ms SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 2972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2053.02ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:10,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 1544 Invalid, 4186 Unknown, 0 Unchecked, 15.25ms Time], IncrementalHoareTripleChecker [1005 Valid, 2972 Invalid, 0 Unknown, 209 Unchecked, 2053.02ms Time] [2021-11-13 17:54:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-11-13 17:54:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 221. [2021-11-13 17:54:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 170 states have (on average 1.3352941176470587) internal successors, (227), 172 states have internal predecessors, (227), 45 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-11-13 17:54:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 317 transitions. [2021-11-13 17:54:10,978 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 317 transitions. Word has length 67 [2021-11-13 17:54:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:10,978 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 317 transitions. [2021-11-13 17:54:10,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-13 17:54:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 317 transitions. [2021-11-13 17:54:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 17:54:10,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:10,980 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:11,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:11,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 17:54:11,206 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:11,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2021-11-13 17:54:11,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:11,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689147003] [2021-11-13 17:54:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:11,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:54:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:54:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:54:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:54:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:54:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:54:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:11,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:11,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689147003] [2021-11-13 17:54:11,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689147003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:11,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852903746] [2021-11-13 17:54:11,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 17:54:11,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:11,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:11,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:11,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 17:54:11,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 17:54:11,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:54:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 17:54:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:11,703 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 27 treesize of output 23 [2021-11-13 17:54:11,923 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-13 17:54:11,923 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 55 treesize of output 33 [2021-11-13 17:54:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:11,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:12,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:54:12,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 17:54:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:12,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852903746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:54:12,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:54:12,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 19 [2021-11-13 17:54:12,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226817276] [2021-11-13 17:54:12,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:54:12,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:54:12,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:54:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:54:12,169 INFO L87 Difference]: Start difference. First operand 221 states and 317 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:54:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:20,272 INFO L93 Difference]: Finished difference Result 4276 states and 6688 transitions. [2021-11-13 17:54:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-11-13 17:54:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2021-11-13 17:54:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:20,300 INFO L225 Difference]: With dead ends: 4276 [2021-11-13 17:54:20,300 INFO L226 Difference]: Without dead ends: 4274 [2021-11-13 17:54:20,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10957 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2300, Invalid=23782, Unknown=0, NotChecked=0, Total=26082 [2021-11-13 17:54:20,309 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 362 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 5405 mSolverCounterSat, 1357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3199.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 6762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.32ms SdHoareTripleChecker+Time, 1357 IncrementalHoareTripleChecker+Valid, 5405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3951.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:20,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 2030 Invalid, 6762 Unknown, 0 Unchecked, 23.32ms Time], IncrementalHoareTripleChecker [1357 Valid, 5405 Invalid, 0 Unknown, 0 Unchecked, 3951.25ms Time] [2021-11-13 17:54:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-11-13 17:54:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 577. [2021-11-13 17:54:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 438 states have (on average 1.3949771689497716) internal successors, (611), 440 states have internal predecessors, (611), 133 states have call successors, (133), 5 states have call predecessors, (133), 5 states have return successors, (133), 131 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 17:54:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 877 transitions. [2021-11-13 17:54:20,665 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 877 transitions. Word has length 71 [2021-11-13 17:54:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:20,666 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 877 transitions. [2021-11-13 17:54:20,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:54:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 877 transitions. [2021-11-13 17:54:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 17:54:20,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:20,668 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:20,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:20,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:54:20,881 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:20,882 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2021-11-13 17:54:20,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:20,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974870461] [2021-11-13 17:54:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:20,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:54:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:54:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:54:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:54:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:54:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:54:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:21,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:21,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974870461] [2021-11-13 17:54:21,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974870461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:21,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015636915] [2021-11-13 17:54:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:21,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:21,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:21,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 17:54:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:21,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 17:54:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:21,490 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 [2021-11-13 17:54:21,833 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 41 treesize of output 29 [2021-11-13 17:54:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:21,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:54:22,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:54:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:22,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015636915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:54:22,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:54:22,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2021-11-13 17:54:22,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404289189] [2021-11-13 17:54:22,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:54:22,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 17:54:22,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 17:54:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 17:54:22,399 INFO L87 Difference]: Start difference. First operand 577 states and 877 transitions. Second operand has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 35 states have internal predecessors, (136), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-13 17:54:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:41,512 INFO L93 Difference]: Finished difference Result 5759 states and 8917 transitions. [2021-11-13 17:54:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-11-13 17:54:41,513 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 35 states have internal predecessors, (136), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2021-11-13 17:54:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:41,541 INFO L225 Difference]: With dead ends: 5759 [2021-11-13 17:54:41,541 INFO L226 Difference]: Without dead ends: 5757 [2021-11-13 17:54:41,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38623 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=10685, Invalid=78417, Unknown=0, NotChecked=0, Total=89102 [2021-11-13 17:54:41,551 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 998 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 8856 mSolverCounterSat, 4011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5107.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 12867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.59ms SdHoareTripleChecker+Time, 4011 IncrementalHoareTripleChecker+Valid, 8856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6210.70ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:41,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 2937 Invalid, 12867 Unknown, 0 Unchecked, 41.59ms Time], IncrementalHoareTripleChecker [4011 Valid, 8856 Invalid, 0 Unknown, 0 Unchecked, 6210.70ms Time] [2021-11-13 17:54:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2021-11-13 17:54:41,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 257. [2021-11-13 17:54:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 206 states have (on average 1.2864077669902914) internal successors, (265), 208 states have internal predecessors, (265), 45 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-11-13 17:54:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 355 transitions. [2021-11-13 17:54:41,840 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 355 transitions. Word has length 71 [2021-11-13 17:54:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:41,841 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 355 transitions. [2021-11-13 17:54:41,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 35 states have internal predecessors, (136), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-13 17:54:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 355 transitions. [2021-11-13 17:54:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 17:54:41,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:41,842 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:41,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:42,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 17:54:42,043 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2021-11-13 17:54:42,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:42,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423826767] [2021-11-13 17:54:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:42,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:54:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:54:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:54:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:54:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:54:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:54:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:42,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:42,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423826767] [2021-11-13 17:54:42,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423826767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:42,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350661193] [2021-11-13 17:54:42,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 17:54:42,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:42,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:42,420 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:42,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 17:54:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 17:54:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:43,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 17:54:43,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350661193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:54:43,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:54:43,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2021-11-13 17:54:43,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701245389] [2021-11-13 17:54:43,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:54:43,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 17:54:43,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 17:54:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 17:54:43,824 INFO L87 Difference]: Start difference. First operand 257 states and 355 transitions. Second operand has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-13 17:54:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:44,360 INFO L93 Difference]: Finished difference Result 335 states and 459 transitions. [2021-11-13 17:54:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 17:54:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2021-11-13 17:54:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:44,367 INFO L225 Difference]: With dead ends: 335 [2021-11-13 17:54:44,367 INFO L226 Difference]: Without dead ends: 303 [2021-11-13 17:54:44,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1546, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 17:54:44,368 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 249 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.18ms SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 256.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:44,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 206 Invalid, 456 Unknown, 0 Unchecked, 2.18ms Time], IncrementalHoareTripleChecker [105 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 256.61ms Time] [2021-11-13 17:54:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-13 17:54:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 264. [2021-11-13 17:54:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 212 states have (on average 1.2688679245283019) internal successors, (269), 214 states have internal predecessors, (269), 46 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-13 17:54:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 361 transitions. [2021-11-13 17:54:44,480 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 361 transitions. Word has length 75 [2021-11-13 17:54:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:44,480 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 361 transitions. [2021-11-13 17:54:44,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-13 17:54:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 361 transitions. [2021-11-13 17:54:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 17:54:44,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:44,482 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:44,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:44,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 17:54:44,691 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash -286552239, now seen corresponding path program 1 times [2021-11-13 17:54:44,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:44,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494614129] [2021-11-13 17:54:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:44,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:54:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:54:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:54:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:54:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:54:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:54:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:54:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:54:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:54:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:54:45,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:45,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494614129] [2021-11-13 17:54:45,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494614129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:45,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802128994] [2021-11-13 17:54:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:45,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:45,105 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:45,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 17:54:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 17:54:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:45,422 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 16 treesize of output 12 [2021-11-13 17:54:45,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:45,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 17:54:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:45,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 17:54:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:45,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:54:45,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2021-11-13 17:54:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:54:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 52 [2021-11-13 17:54:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:49,616 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-13 17:54:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 55 [2021-11-13 17:54:50,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 17:54:50,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:54:50,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 17:54:50,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869267362] [2021-11-13 17:54:50,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:54:50,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:54:50,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:50,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:54:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=458, Unknown=4, NotChecked=0, Total=552 [2021-11-13 17:54:50,210 INFO L87 Difference]: Start difference. First operand 264 states and 361 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-13 17:54:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:50,760 INFO L93 Difference]: Finished difference Result 305 states and 423 transitions. [2021-11-13 17:54:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 17:54:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 83 [2021-11-13 17:54:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:50,762 INFO L225 Difference]: With dead ends: 305 [2021-11-13 17:54:50,762 INFO L226 Difference]: Without dead ends: 303 [2021-11-13 17:54:50,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=176, Invalid=942, Unknown=4, NotChecked=0, Total=1122 [2021-11-13 17:54:50,764 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 105 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:50,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 244 Invalid, 462 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [122 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 231.59ms Time] [2021-11-13 17:54:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-13 17:54:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 145. [2021-11-13 17:54:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 119 states have internal predecessors, (141), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 17:54:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 187 transitions. [2021-11-13 17:54:50,851 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 187 transitions. Word has length 83 [2021-11-13 17:54:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:50,851 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 187 transitions. [2021-11-13 17:54:50,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-13 17:54:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 187 transitions. [2021-11-13 17:54:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 17:54:50,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:50,853 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:50,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:51,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:51,054 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2021-11-13 17:54:51,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:51,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900586833] [2021-11-13 17:54:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:51,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:54:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:54:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:54:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:54:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:54:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:54:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:54:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:54:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:54:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:54:51,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:51,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900586833] [2021-11-13 17:54:51,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900586833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:51,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704491323] [2021-11-13 17:54:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:54:51,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:51,316 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 17:54:51,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:54:51,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:54:51,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 17:54:51,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:51,557 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 21 treesize of output 17 [2021-11-13 17:54:51,603 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:54:51,603 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 30 treesize of output 29 [2021-11-13 17:54:51,666 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:54:51,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-13 17:54:52,020 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-13 17:54:52,021 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 55 treesize of output 33 [2021-11-13 17:54:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:54:52,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:52,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:54:52,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 17:54:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:54:52,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704491323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:54:52,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:54:52,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-11-13 17:54:52,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922810689] [2021-11-13 17:54:52,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:54:52,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 17:54:52,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 17:54:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-11-13 17:54:52,355 INFO L87 Difference]: Start difference. First operand 145 states and 187 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-13 17:55:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:06,057 INFO L93 Difference]: Finished difference Result 3257 states and 5005 transitions. [2021-11-13 17:55:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-11-13 17:55:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2021-11-13 17:55:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:06,078 INFO L225 Difference]: With dead ends: 3257 [2021-11-13 17:55:06,078 INFO L226 Difference]: Without dead ends: 3255 [2021-11-13 17:55:06,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 195 SyntacticMatches, 10 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34808 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5132, Invalid=72988, Unknown=0, NotChecked=0, Total=78120 [2021-11-13 17:55:06,090 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 392 mSDsluCounter, 3123 mSDsCounter, 0 mSdLazyCounter, 10065 mSolverCounterSat, 1896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5086.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 3779 SdHoareTripleChecker+Invalid, 11961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.40ms SdHoareTripleChecker+Time, 1896 IncrementalHoareTripleChecker+Valid, 10065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6202.65ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:06,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 3779 Invalid, 11961 Unknown, 0 Unchecked, 35.40ms Time], IncrementalHoareTripleChecker [1896 Valid, 10065 Invalid, 0 Unknown, 0 Unchecked, 6202.65ms Time] [2021-11-13 17:55:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-11-13 17:55:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 290. [2021-11-13 17:55:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 228 states have (on average 1.3070175438596492) internal successors, (298), 231 states have internal predecessors, (298), 56 states have call successors, (56), 5 states have call predecessors, (56), 5 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2021-11-13 17:55:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 410 transitions. [2021-11-13 17:55:06,413 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 410 transitions. Word has length 95 [2021-11-13 17:55:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:06,413 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 410 transitions. [2021-11-13 17:55:06,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-13 17:55:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 410 transitions. [2021-11-13 17:55:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 17:55:06,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:06,418 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:06,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:06,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:55:06,644 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash -737806033, now seen corresponding path program 2 times [2021-11-13 17:55:06,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:06,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884092326] [2021-11-13 17:55:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:06,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:55:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:55:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:55:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:55:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:55:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:55:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:55:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:55:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:55:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:55:06,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:55:06,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884092326] [2021-11-13 17:55:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884092326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:55:06,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740747425] [2021-11-13 17:55:06,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:55:06,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:55:06,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:55:06,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:55:07,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 17:55:07,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:55:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:55:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 17:55:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:07,473 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 20 treesize of output 16 [2021-11-13 17:55:07,605 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:55:07,605 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 29 treesize of output 28 [2021-11-13 17:55:07,711 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:07,712 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 23 treesize of output 22 [2021-11-13 17:55:08,102 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 41 treesize of output 29 [2021-11-13 17:55:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 17:55:08,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:55:09,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:55:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:55:09,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740747425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:55:09,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:55:09,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2021-11-13 17:55:09,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987945567] [2021-11-13 17:55:09,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:55:09,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-13 17:55:09,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-13 17:55:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 17:55:09,467 INFO L87 Difference]: Start difference. First operand 290 states and 410 transitions. Second operand has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-13 17:58:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:17,449 INFO L93 Difference]: Finished difference Result 2359 states and 3563 transitions. [2021-11-13 17:58:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-11-13 17:58:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 95 [2021-11-13 17:58:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:17,461 INFO L225 Difference]: With dead ends: 2359 [2021-11-13 17:58:17,461 INFO L226 Difference]: Without dead ends: 2357 [2021-11-13 17:58:17,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 191 SyntacticMatches, 14 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26197 ImplicationChecksByTransitivity, 179.0s TimeCoverageRelationStatistics Valid=6709, Invalid=56966, Unknown=81, NotChecked=0, Total=63756 [2021-11-13 17:58:17,467 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 1067 mSDsluCounter, 3756 mSDsCounter, 0 mSdLazyCounter, 13086 mSolverCounterSat, 3213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6818.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 4277 SdHoareTripleChecker+Invalid, 17090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.68ms SdHoareTripleChecker+Time, 3213 IncrementalHoareTripleChecker+Valid, 13086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 791 IncrementalHoareTripleChecker+Unchecked, 8231.23ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:17,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 4277 Invalid, 17090 Unknown, 0 Unchecked, 42.68ms Time], IncrementalHoareTripleChecker [3213 Valid, 13086 Invalid, 0 Unknown, 791 Unchecked, 8231.23ms Time] [2021-11-13 17:58:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-11-13 17:58:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 263. [2021-11-13 17:58:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 208 states have (on average 1.2836538461538463) internal successors, (267), 211 states have internal predecessors, (267), 48 states have call successors, (48), 6 states have call predecessors, (48), 6 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-13 17:58:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 363 transitions. [2021-11-13 17:58:17,686 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 363 transitions. Word has length 95 [2021-11-13 17:58:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 363 transitions. [2021-11-13 17:58:17,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-13 17:58:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 363 transitions. [2021-11-13 17:58:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 17:58:17,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:17,688 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:17,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 17:58:17,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:17,896 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash 519418531, now seen corresponding path program 9 times [2021-11-13 17:58:17,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:17,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886846416] [2021-11-13 17:58:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:17,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:58:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:58:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:58:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:58:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:58:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:58:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:58:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:58:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:58:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:58:18,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:18,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886846416] [2021-11-13 17:58:18,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886846416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:58:18,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297715614] [2021-11-13 17:58:18,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:58:18,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:18,160 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:18,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 17:58:18,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-13 17:58:18,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:58:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 17:58:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:18,720 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 21 treesize of output 17 [2021-11-13 17:58:18,787 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 17:58:18,787 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 34 treesize of output 33 [2021-11-13 17:58:18,877 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-13 17:58:18,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 49 [2021-11-13 17:58:18,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 17:58:18,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:58:18,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-13 17:58:18,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075252919] [2021-11-13 17:58:18,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:58:18,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 17:58:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 17:58:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:58:18,996 INFO L87 Difference]: Start difference. First operand 263 states and 363 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 17:58:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:25,580 INFO L93 Difference]: Finished difference Result 2026 states and 3107 transitions. [2021-11-13 17:58:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-13 17:58:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 99 [2021-11-13 17:58:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:25,593 INFO L225 Difference]: With dead ends: 2026 [2021-11-13 17:58:25,594 INFO L226 Difference]: Without dead ends: 2024 [2021-11-13 17:58:25,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8598 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2170, Invalid=20180, Unknown=0, NotChecked=0, Total=22350 [2021-11-13 17:58:25,596 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 191 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2214.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 5283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.50ms SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2702.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:25,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1771 Invalid, 5283 Unknown, 0 Unchecked, 12.50ms Time], IncrementalHoareTripleChecker [824 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 2702.83ms Time] [2021-11-13 17:58:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-11-13 17:58:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 343. [2021-11-13 17:58:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 270 states have (on average 1.3074074074074074) internal successors, (353), 273 states have internal predecessors, (353), 66 states have call successors, (66), 6 states have call predecessors, (66), 6 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-13 17:58:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 485 transitions. [2021-11-13 17:58:25,873 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 485 transitions. Word has length 99 [2021-11-13 17:58:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:25,873 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 485 transitions. [2021-11-13 17:58:25,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 17:58:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 485 transitions. [2021-11-13 17:58:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 17:58:25,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:25,876 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:25,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 17:58:26,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 17:58:26,088 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 943065253, now seen corresponding path program 2 times [2021-11-13 17:58:26,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:26,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772600682] [2021-11-13 17:58:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:26,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:58:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:58:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:58:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 17:58:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 17:58:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:58:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:58:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:58:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:58:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:58:26,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772600682] [2021-11-13 17:58:26,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772600682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:58:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294976856] [2021-11-13 17:58:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:58:26,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:26,393 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:26,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 17:58:26,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:58:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:58:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 17:58:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:26,855 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 20 treesize of output 16 [2021-11-13 17:58:26,983 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:58:26,983 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 23 treesize of output 22 [2021-11-13 17:58:27,396 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 41 treesize of output 29 [2021-11-13 17:58:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:58:27,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:58:27,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 17:58:27,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 17:58:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 17:58:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294976856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:58:28,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:58:28,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2021-11-13 17:58:28,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128676664] [2021-11-13 17:58:28,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:58:28,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 17:58:28,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 17:58:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1813, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 17:58:28,091 INFO L87 Difference]: Start difference. First operand 343 states and 485 transitions. Second operand has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-13 18:01:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:57,417 INFO L93 Difference]: Finished difference Result 4940 states and 7592 transitions. [2021-11-13 18:01:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-11-13 18:01:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 99 [2021-11-13 18:01:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:57,435 INFO L225 Difference]: With dead ends: 4940 [2021-11-13 18:01:57,436 INFO L226 Difference]: Without dead ends: 4938 [2021-11-13 18:01:57,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 192 SyntacticMatches, 5 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35328 ImplicationChecksByTransitivity, 197.3s TimeCoverageRelationStatistics Valid=7846, Invalid=76451, Unknown=93, NotChecked=0, Total=84390 [2021-11-13 18:01:57,444 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 1370 mSDsluCounter, 4021 mSDsCounter, 0 mSdLazyCounter, 14243 mSolverCounterSat, 3659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6761.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 4504 SdHoareTripleChecker+Invalid, 18377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.54ms SdHoareTripleChecker+Time, 3659 IncrementalHoareTripleChecker+Valid, 14243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 8196.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:57,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 4504 Invalid, 18377 Unknown, 0 Unchecked, 39.54ms Time], IncrementalHoareTripleChecker [3659 Valid, 14243 Invalid, 0 Unknown, 475 Unchecked, 8196.90ms Time] [2021-11-13 18:01:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-11-13 18:01:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 833. [2021-11-13 18:01:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 636 states have (on average 1.389937106918239) internal successors, (884), 639 states have internal predecessors, (884), 189 states have call successors, (189), 7 states have call predecessors, (189), 7 states have return successors, (189), 186 states have call predecessors, (189), 189 states have call successors, (189) [2021-11-13 18:01:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1262 transitions. [2021-11-13 18:01:58,223 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1262 transitions. Word has length 99 [2021-11-13 18:01:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:58,223 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1262 transitions. [2021-11-13 18:01:58,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-13 18:01:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1262 transitions. [2021-11-13 18:01:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:01:58,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:58,227 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:58,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:58,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:01:58,440 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2058870425, now seen corresponding path program 10 times [2021-11-13 18:01:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:58,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864549895] [2021-11-13 18:01:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:58,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:01:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:01:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:01:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:01:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:01:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:01:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:01:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 18:01:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:01:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:01:58,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:58,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864549895] [2021-11-13 18:01:58,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864549895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:58,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783854525] [2021-11-13 18:01:58,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:58,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:58,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:58,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:01:58,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:58,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:01:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:58,923 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 27 treesize of output 23 [2021-11-13 18:01:59,301 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-13 18:01:59,302 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 55 treesize of output 33 [2021-11-13 18:01:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:01:59,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:59,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 18:01:59,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-13 18:01:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:01:59,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783854525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:59,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2021-11-13 18:01:59,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051037277] [2021-11-13 18:01:59,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:59,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:01:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:01:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:01:59,704 INFO L87 Difference]: Start difference. First operand 833 states and 1262 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:03:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:14,427 INFO L93 Difference]: Finished difference Result 27010 states and 42436 transitions. [2021-11-13 18:03:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 914 states. [2021-11-13 18:03:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-11-13 18:03:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:14,523 INFO L225 Difference]: With dead ends: 27010 [2021-11-13 18:03:14,523 INFO L226 Difference]: Without dead ends: 27008 [2021-11-13 18:03:14,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 209 SyntacticMatches, 6 SemanticMatches, 917 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404858 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=29389, Invalid=814253, Unknown=0, NotChecked=0, Total=843642 [2021-11-13 18:03:14,599 INFO L933 BasicCegarLoop]: 2109 mSDtfsCounter, 1031 mSDsluCounter, 8367 mSDsCounter, 0 mSdLazyCounter, 38187 mSolverCounterSat, 9299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20021.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 10476 SdHoareTripleChecker+Invalid, 47486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 109.62ms SdHoareTripleChecker+Time, 9299 IncrementalHoareTripleChecker+Valid, 38187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24221.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:14,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 10476 Invalid, 47486 Unknown, 0 Unchecked, 109.62ms Time], IncrementalHoareTripleChecker [9299 Valid, 38187 Invalid, 0 Unknown, 0 Unchecked, 24221.32ms Time] [2021-11-13 18:03:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2021-11-13 18:03:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 2135. [2021-11-13 18:03:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 1612 states have (on average 1.4218362282878412) internal successors, (2292), 1615 states have internal predecessors, (2292), 515 states have call successors, (515), 7 states have call predecessors, (515), 7 states have return successors, (515), 512 states have call predecessors, (515), 515 states have call successors, (515) [2021-11-13 18:03:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3322 transitions. [2021-11-13 18:03:17,454 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3322 transitions. Word has length 103 [2021-11-13 18:03:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 3322 transitions. [2021-11-13 18:03:17,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:03:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3322 transitions. [2021-11-13 18:03:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:03:17,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:17,460 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:17,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:17,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 18:03:17,688 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash 213503259, now seen corresponding path program 2 times [2021-11-13 18:03:17,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:17,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695006612] [2021-11-13 18:03:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:17,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:03:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:03:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:03:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:03:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:03:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:03:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:03:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 18:03:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:03:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:03:18,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:18,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695006612] [2021-11-13 18:03:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695006612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:18,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892675143] [2021-11-13 18:03:18,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:03:18,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:18,006 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:18,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d85fcc-2b80-4f76-8fbe-e2c496b6b5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:03:18,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:03:18,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:18,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:03:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:18,460 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 [2021-11-13 18:03:18,957 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 41 treesize of output 29 [2021-11-13 18:03:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:03:18,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 18:03:19,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-13 18:03:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:03:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892675143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:19,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:19,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2021-11-13 18:03:19,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213529660] [2021-11-13 18:03:19,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:19,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 18:03:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 18:03:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:03:19,649 INFO L87 Difference]: Start difference. First operand 2135 states and 3322 transitions. Second operand has 47 states, 47 states have (on average 4.170212765957447) internal successors, (196), 47 states have internal predecessors, (196), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27)