./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnif.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_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/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_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/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_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/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 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:00:59,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:00:59,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:00:59,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:00:59,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:00:59,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:00:59,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:00:59,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:00:59,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:00:59,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:00:59,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:00:59,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:00:59,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:00:59,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:00:59,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:00:59,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:00:59,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:00:59,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:00:59,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:00:59,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:00:59,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:00:59,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:00:59,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:00:59,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:00:59,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:00:59,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:00:59,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:00:59,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:00:59,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:00:59,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:00:59,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:00:59,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:00:59,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:00:59,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:00:59,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:00:59,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:00:59,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:00:59,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:00:59,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:00:59,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:00:59,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:00:59,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:00:59,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:00:59,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:00:59,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:00:59,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:00:59,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:00:59,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:00:59,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:00:59,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:00:59,730 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:00:59,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:00:59,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:00:59,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:00:59,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:00:59,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:00:59,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:00:59,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:00:59,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:00:59,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:00:59,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:00:59,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:00:59,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:00:59,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:00:59,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:00:59,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:00:59,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:00:59,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:00:59,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:00:59,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:00:59,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:00:59,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:00:59,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:00:59,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:00:59,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:00:59,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:00:59,740 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_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2021-11-13 18:01:00,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:01:00,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:01:00,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:01:00,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:01:00,062 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:01:00,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-tiling/rewnif.c [2021-11-13 18:01:00,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/data/727fad5a7/38a5172cc45d4840accb3c856c7a246f/FLAG385d4613d [2021-11-13 18:01:00,636 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:01:00,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/sv-benchmarks/c/array-tiling/rewnif.c [2021-11-13 18:01:00,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/data/727fad5a7/38a5172cc45d4840accb3c856c7a246f/FLAG385d4613d [2021-11-13 18:01:01,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/data/727fad5a7/38a5172cc45d4840accb3c856c7a246f [2021-11-13 18:01:01,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:01:01,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:01:01,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:01:01,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:01:01,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:01:01,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f432e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01, skipping insertion in model container [2021-11-13 18:01:01,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:01:01,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:01:01,252 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_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2021-11-13 18:01:01,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:01:01,275 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:01:01,287 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_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2021-11-13 18:01:01,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:01:01,306 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:01:01,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01 WrapperNode [2021-11-13 18:01:01,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:01:01,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:01:01,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:01:01,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:01:01,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:01:01,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:01:01,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:01:01,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:01:01,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:01:01,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:01:01,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:01:01,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:01:01,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (1/1) ... [2021-11-13 18:01:01,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:01:01,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:01,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:01:01,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:01:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:01:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:01:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:01:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:01:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:01:01,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:01:01,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:01:01,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:01:01,741 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:01:01,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:01:01 BoogieIcfgContainer [2021-11-13 18:01:01,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:01:01,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:01:01,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:01:01,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:01:01,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:01:01" (1/3) ... [2021-11-13 18:01:01,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11559607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:01:01, skipping insertion in model container [2021-11-13 18:01:01,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:01" (2/3) ... [2021-11-13 18:01:01,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11559607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:01:01, skipping insertion in model container [2021-11-13 18:01:01,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:01:01" (3/3) ... [2021-11-13 18:01:01,751 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2021-11-13 18:01:01,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:01:01,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:01:01,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:01:01,813 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 18:01:01,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:01:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:01:01,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:01,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:01,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:01,873 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2021-11-13 18:01:01,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:01,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635084377] [2021-11-13 18:01:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:01,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,091 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 18:01:02,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:02,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635084377] [2021-11-13 18:01:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635084377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:02,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:02,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:01:02,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215123832] [2021-11-13 18:01:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:01:02,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:01:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:01:02,147 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:02,165 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-13 18:01:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:01:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:01:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:02,175 INFO L225 Difference]: With dead ends: 29 [2021-11-13 18:01:02,176 INFO L226 Difference]: Without dead ends: 14 [2021-11-13 18:01:02,179 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 18:01:02,184 INFO L933 BasicCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:02,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:01:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-13 18:01:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-13 18:01:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-13 18:01:02,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-13 18:01:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:02,224 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-13 18:01:02,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-13 18:01:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:01:02,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:02,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:02,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:01:02,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2021-11-13 18:01:02,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:02,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69783049] [2021-11-13 18:01:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:02,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,357 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 18:01:02,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:02,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69783049] [2021-11-13 18:01:02,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69783049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:02,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:01:02,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127554063] [2021-11-13 18:01:02,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:02,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:01:02,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:01:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:01:02,362 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:02,408 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-11-13 18:01:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:01:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:01:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:02,410 INFO L225 Difference]: With dead ends: 29 [2021-11-13 18:01:02,410 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:01:02,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:01:02,412 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:02,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 38.91ms Time] [2021-11-13 18:01:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:01:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-13 18:01:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 18:01:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-13 18:01:02,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-11-13 18:01:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:02,420 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-13 18:01:02,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-13 18:01:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:01:02,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:02,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:02,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:01:02,422 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2021-11-13 18:01:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:02,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791700880] [2021-11-13 18:01:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:02,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:02,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:02,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791700880] [2021-11-13 18:01:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791700880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:02,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035586826] [2021-11-13 18:01:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:02,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:02,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:02,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:02,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:01:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:01:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:02,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:02,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035586826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:02,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:02,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 18:01:02,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96593409] [2021-11-13 18:01:02,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:02,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:01:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:01:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:01:02,854 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 18:01:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:02,949 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-13 18:01:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:01:02,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 12 [2021-11-13 18:01:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:02,954 INFO L225 Difference]: With dead ends: 34 [2021-11-13 18:01:02,954 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 18:01:02,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:01:02,956 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:02,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 67.95ms Time] [2021-11-13 18:01:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 18:01:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-13 18:01:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 18:01:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-13 18:01:02,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-13 18:01:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:02,963 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-13 18:01:02,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 18:01:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-13 18:01:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:01:02,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:02,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:03,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:03,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:03,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:03,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2021-11-13 18:01:03,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:03,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797363358] [2021-11-13 18:01:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:03,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:03,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:03,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797363358] [2021-11-13 18:01:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797363358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:03,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383628236] [2021-11-13 18:01:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:03,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:03,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:03,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:01:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:01:03,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:03,694 INFO L354 Elim1Store]: treesize reduction 46, result has 23.3 percent of original size [2021-11-13 18:01:03,696 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 39 treesize of output 38 [2021-11-13 18:01:03,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:03,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:03,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-13 18:01:03,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824130849] [2021-11-13 18:01:03,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:03,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:01:03,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:03,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:01:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:01:03,850 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:03,950 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-13 18:01:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:01:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-13 18:01:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:03,953 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:01:03,954 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:01:03,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:01:03,961 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:03,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 29 Invalid, 51 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 52.10ms Time] [2021-11-13 18:01:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:01:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-11-13 18:01:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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 18:01:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-13 18:01:03,981 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2021-11-13 18:01:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:03,982 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-13 18:01:03,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-13 18:01:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:01:03,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:03,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:04,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 18:01:04,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:04,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1948624002, now seen corresponding path program 2 times [2021-11-13 18:01:04,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:04,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320559612] [2021-11-13 18:01:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:04,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:04,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:04,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320559612] [2021-11-13 18:01:04,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320559612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:04,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124637666] [2021-11-13 18:01:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:04,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:04,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:04,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:01:04,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:04,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:01:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:04,596 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-13 18:01:04,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:04,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-13 18:01:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:04,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:04,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:01:04,663 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 35 treesize of output 37 [2021-11-13 18:01:04,935 INFO L354 Elim1Store]: treesize reduction 131, result has 23.8 percent of original size [2021-11-13 18:01:04,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 75 [2021-11-13 18:01:05,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:05,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:05,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-13 18:01:05,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14902617] [2021-11-13 18:01:05,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:05,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:01:05,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:01:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:01:05,425 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 18:01:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:05,525 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-13 18:01:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:01:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2021-11-13 18:01:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:05,526 INFO L225 Difference]: With dead ends: 35 [2021-11-13 18:01:05,527 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:01:05,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:01:05,528 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.40ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:05,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 76 Unknown, 0 Unchecked, 4.40ms Time], IncrementalHoareTripleChecker [20 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 59.28ms Time] [2021-11-13 18:01:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:01:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-11-13 18:01:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 18:01:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-13 18:01:05,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2021-11-13 18:01:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:05,533 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-13 18:01:05,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 18:01:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-13 18:01:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:01:05,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:05,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:05,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:05,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:05,748 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2021-11-13 18:01:05,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:05,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569859056] [2021-11-13 18:01:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:05,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:05,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:05,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569859056] [2021-11-13 18:01:05,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569859056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:05,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018416653] [2021-11-13 18:01:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:05,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:05,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:05,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:01:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:01:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:06,026 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 25 [2021-11-13 18:01:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:06,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:06,118 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 16 treesize of output 14 [2021-11-13 18:01:06,121 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 32 treesize of output 28 [2021-11-13 18:01:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018416653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:06,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:06,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2021-11-13 18:01:06,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080629706] [2021-11-13 18:01:06,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:06,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:06,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:01:06,155 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:06,370 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-13 18:01:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:01:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-13 18:01:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:06,372 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:01:06,372 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:01:06,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:06,373 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 68 Invalid, 178 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [32 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 116.35ms Time] [2021-11-13 18:01:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:01:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-11-13 18:01:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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 18:01:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-13 18:01:06,381 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2021-11-13 18:01:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:06,382 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-13 18:01:06,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-13 18:01:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:01:06,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:06,384 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:06,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:06,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:06,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:06,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2021-11-13 18:01:06,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:06,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718657905] [2021-11-13 18:01:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:06,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:06,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718657905] [2021-11-13 18:01:06,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718657905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:06,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764542927] [2021-11-13 18:01:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:06,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:06,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:06,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:01:06,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:06,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:01:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:06,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:06,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764542927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:06,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:06,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-13 18:01:06,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512616932] [2021-11-13 18:01:06,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:06,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:06,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:01:06,933 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 18:01:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:07,046 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-11-13 18:01:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:01:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 24 [2021-11-13 18:01:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:07,049 INFO L225 Difference]: With dead ends: 85 [2021-11-13 18:01:07,049 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 18:01:07,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:01:07,051 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.52ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:07,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 44 Invalid, 117 Unknown, 0 Unchecked, 2.52ms Time], IncrementalHoareTripleChecker [20 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 67.33ms Time] [2021-11-13 18:01:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 18:01:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-11-13 18:01:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-13 18:01:07,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2021-11-13 18:01:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:07,067 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-13 18:01:07,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 18:01:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-13 18:01:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:01:07,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:07,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:07,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:01:07,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2021-11-13 18:01:07,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:07,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272553412] [2021-11-13 18:01:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:07,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:07,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272553412] [2021-11-13 18:01:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272553412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243332352] [2021-11-13 18:01:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:07,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:07,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:07,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:01:07,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 18:01:07,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:07,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:01:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:07,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:07,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-13 18:01:07,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:07,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:01:07,732 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 37 treesize of output 39 [2021-11-13 18:01:07,932 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:07,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:01:08,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:08,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:08,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-13 18:01:08,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227166566] [2021-11-13 18:01:08,358 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:08,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:01:08,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:01:08,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:01:08,360 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 18:01:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:08,489 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-13 18:01:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:01:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 28 [2021-11-13 18:01:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:08,490 INFO L225 Difference]: With dead ends: 47 [2021-11-13 18:01:08,490 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:01:08,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:08,492 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:08,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 38 Invalid, 146 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [19 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 90.64ms Time] [2021-11-13 18:01:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:01:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-11-13 18:01:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-13 18:01:08,497 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2021-11-13 18:01:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:08,498 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-13 18:01:08,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 18:01:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-13 18:01:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:01:08,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:08,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:08,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:01:08,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:01:08,712 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2021-11-13 18:01:08,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:08,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370787161] [2021-11-13 18:01:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:08,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:08,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:08,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370787161] [2021-11-13 18:01:08,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370787161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:08,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045674430] [2021-11-13 18:01:08,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:08,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:08,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:08,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:08,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:01:08,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:08,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:01:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:01:09,105 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 47 treesize of output 31 [2021-11-13 18:01:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:09,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:09,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-13 18:01:09,248 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 32 treesize of output 28 [2021-11-13 18:01:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:09,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045674430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:09,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:09,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2021-11-13 18:01:09,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983741739] [2021-11-13 18:01:09,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:09,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:01:09,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:01:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:01:09,325 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:09,661 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-11-13 18:01:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:01:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-13 18:01:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:09,663 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:01:09,663 INFO L226 Difference]: Without dead ends: 70 [2021-11-13 18:01:09,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:01:09,664 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:09,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 113 Invalid, 339 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [45 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 188.57ms Time] [2021-11-13 18:01:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-13 18:01:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-11-13 18:01:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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 18:01:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-11-13 18:01:09,672 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2021-11-13 18:01:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:09,672 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-11-13 18:01:09,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-11-13 18:01:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:01:09,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:09,674 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:09,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:09,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:09,900 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 5 times [2021-11-13 18:01:09,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:09,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565780275] [2021-11-13 18:01:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:09,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:09,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:09,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565780275] [2021-11-13 18:01:09,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565780275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:09,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208262607] [2021-11-13 18:01:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:01:09,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:09,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:10,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:01:10,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:01:10,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:01:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:10,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:10,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208262607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:10,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:10,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-11-13 18:01:10,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59968038] [2021-11-13 18:01:10,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:10,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:01:10,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:01:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:01:10,283 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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 18:01:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:10,420 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-11-13 18:01:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:01:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-13 18:01:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:10,423 INFO L225 Difference]: With dead ends: 82 [2021-11-13 18:01:10,424 INFO L226 Difference]: Without dead ends: 59 [2021-11-13 18:01:10,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:01:10,425 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:10,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 134 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [22 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 78.29ms Time] [2021-11-13 18:01:10,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-13 18:01:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-11-13 18:01:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-13 18:01:10,445 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-11-13 18:01:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:10,449 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-13 18:01:10,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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 18:01:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-13 18:01:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:01:10,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:10,454 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:10,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:10,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:01:10,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 6 times [2021-11-13 18:01:10,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:10,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584436369] [2021-11-13 18:01:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:10,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:10,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:10,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584436369] [2021-11-13 18:01:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584436369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:10,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607904880] [2021-11-13 18:01:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:01:10,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:10,864 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:10,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:01:10,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 18:01:10,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:01:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:11,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:11,096 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:11,096 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 18:01:11,165 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:11,166 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 40 treesize of output 42 [2021-11-13 18:01:11,374 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 69 [2021-11-13 18:01:11,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:11,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:11,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:01:11,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973433991] [2021-11-13 18:01:11,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:01:11,744 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:12,023 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-11-13 18:01:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:01:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-13 18:01:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:12,025 INFO L225 Difference]: With dead ends: 59 [2021-11-13 18:01:12,025 INFO L226 Difference]: Without dead ends: 57 [2021-11-13 18:01:12,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:01:12,026 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:12,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 70 Invalid, 266 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [35 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 149.45ms Time] [2021-11-13 18:01:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-13 18:01:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2021-11-13 18:01:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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 18:01:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-13 18:01:12,032 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2021-11-13 18:01:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:12,032 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-13 18:01:12,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-13 18:01:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:01:12,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:12,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:12,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:12,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:12,234 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 7 times [2021-11-13 18:01:12,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:12,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959886818] [2021-11-13 18:01:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:12,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:12,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959886818] [2021-11-13 18:01:12,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959886818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986714298] [2021-11-13 18:01:12,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:01:12,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:12,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:12,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:01:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:01:12,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:12,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:01:12,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:12,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:12,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:01:12,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844788392] [2021-11-13 18:01:12,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:12,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:12,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:12,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:12,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:01:12,726 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:12,975 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-11-13 18:01:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:01:12,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-13 18:01:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:12,978 INFO L225 Difference]: With dead ends: 75 [2021-11-13 18:01:12,978 INFO L226 Difference]: Without dead ends: 73 [2021-11-13 18:01:12,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:01:12,980 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:12,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 87 Invalid, 308 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 177.01ms Time] [2021-11-13 18:01:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-13 18:01:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-11-13 18:01:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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 18:01:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-13 18:01:12,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2021-11-13 18:01:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:12,999 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-13 18:01:12,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-13 18:01:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:01:13,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:13,003 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:13,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:13,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:13,224 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:13,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:13,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 8 times [2021-11-13 18:01:13,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:13,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918758052] [2021-11-13 18:01:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:13,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:13,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:13,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918758052] [2021-11-13 18:01:13,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918758052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:13,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684343920] [2021-11-13 18:01:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:13,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:13,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:01:13,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:01:13,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:13,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684343920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:13,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:13,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2021-11-13 18:01:13,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012278621] [2021-11-13 18:01:13,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:13,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:01:13,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:01:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:01:13,676 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:13,815 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-11-13 18:01:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:01:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-13 18:01:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:13,816 INFO L225 Difference]: With dead ends: 98 [2021-11-13 18:01:13,816 INFO L226 Difference]: Without dead ends: 71 [2021-11-13 18:01:13,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:01:13,818 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:13,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 66 Invalid, 166 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [33 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 84.94ms Time] [2021-11-13 18:01:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-13 18:01:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-11-13 18:01:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-11-13 18:01:13,825 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2021-11-13 18:01:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:13,825 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-11-13 18:01:13,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-11-13 18:01:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:01:13,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:13,826 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:13,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:14,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:01:14,040 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 9 times [2021-11-13 18:01:14,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:14,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636382842] [2021-11-13 18:01:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:14,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:14,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:14,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636382842] [2021-11-13 18:01:14,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636382842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:14,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485441109] [2021-11-13 18:01:14,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:14,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:14,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:14,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:14,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:01:14,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-13 18:01:14,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:01:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:14,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:14,667 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:14,667 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 26 treesize of output 25 [2021-11-13 18:01:14,726 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:14,727 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 40 treesize of output 42 [2021-11-13 18:01:14,857 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 66 [2021-11-13 18:01:15,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:15,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:15,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-13 18:01:15,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707631640] [2021-11-13 18:01:15,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:15,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:01:15,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:15,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:01:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:01:15,143 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 18:01:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:15,529 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-11-13 18:01:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:01:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-13 18:01:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:15,530 INFO L225 Difference]: With dead ends: 71 [2021-11-13 18:01:15,530 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 18:01:15,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:01:15,531 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:15,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 106 Invalid, 382 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [50 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 215.93ms Time] [2021-11-13 18:01:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 18:01:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-11-13 18:01:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 18:01:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-13 18:01:15,537 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2021-11-13 18:01:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:15,537 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-13 18:01:15,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 18:01:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-13 18:01:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:01:15,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:15,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:15,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:15,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:01:15,752 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:15,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 10 times [2021-11-13 18:01:15,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:15,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135205089] [2021-11-13 18:01:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:15,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:15,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:15,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135205089] [2021-11-13 18:01:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135205089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:15,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988338368] [2021-11-13 18:01:15,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:15,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:15,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:15,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:15,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:01:15,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:15,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:01:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:16,279 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 25 [2021-11-13 18:01:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:16,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:16,417 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 16 treesize of output 14 [2021-11-13 18:01:16,419 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 32 treesize of output 28 [2021-11-13 18:01:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:16,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988338368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:16,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:16,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-11-13 18:01:16,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59419469] [2021-11-13 18:01:16,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:01:16,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:01:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:16,523 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:17,050 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2021-11-13 18:01:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:01:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-13 18:01:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:17,052 INFO L225 Difference]: With dead ends: 96 [2021-11-13 18:01:17,052 INFO L226 Difference]: Without dead ends: 94 [2021-11-13 18:01:17,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:01:17,054 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:17,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 184 Invalid, 580 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [72 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 312.26ms Time] [2021-11-13 18:01:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-13 18:01:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2021-11-13 18:01:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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 18:01:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-13 18:01:17,062 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 44 [2021-11-13 18:01:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:17,062 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-13 18:01:17,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-13 18:01:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:01:17,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:17,063 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:17,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:17,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:01:17,284 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 11 times [2021-11-13 18:01:17,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:17,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891053200] [2021-11-13 18:01:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:17,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:17,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:17,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891053200] [2021-11-13 18:01:17,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891053200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:17,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477034519] [2021-11-13 18:01:17,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:01:17,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:17,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:17,416 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:17,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:01:17,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 18:01:17,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:01:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:17,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:17,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477034519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:17,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:17,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2021-11-13 18:01:17,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648474852] [2021-11-13 18:01:17,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:17,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:01:17,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:01:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:17,925 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 18:01:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:18,083 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2021-11-13 18:01:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:01:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 48 [2021-11-13 18:01:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:18,085 INFO L225 Difference]: With dead ends: 114 [2021-11-13 18:01:18,085 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 18:01:18,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:01:18,086 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:18,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 85 Invalid, 193 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [42 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 93.28ms Time] [2021-11-13 18:01:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 18:01:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-11-13 18:01:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 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 18:01:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-11-13 18:01:18,095 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2021-11-13 18:01:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:18,095 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-11-13 18:01:18,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 18:01:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-11-13 18:01:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 18:01:18,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:18,096 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:18,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:01:18,316 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 12 times [2021-11-13 18:01:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:18,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466979221] [2021-11-13 18:01:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:18,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 1 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:18,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:18,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466979221] [2021-11-13 18:01:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466979221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:18,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306156218] [2021-11-13 18:01:18,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:01:18,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:18,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:18,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:01:18,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-13 18:01:18,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:01:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:18,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:19,003 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:19,004 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 18:01:19,060 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:19,061 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 37 treesize of output 39 [2021-11-13 18:01:19,220 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:01:19,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:19,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:19,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-13 18:01:19,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708924903] [2021-11-13 18:01:19,620 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:19,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:01:19,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:01:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:19,621 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:20,108 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-11-13 18:01:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 18:01:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-13 18:01:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:20,110 INFO L225 Difference]: With dead ends: 83 [2021-11-13 18:01:20,110 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 18:01:20,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:01:20,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:20,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 148 Invalid, 546 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [53 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 247.81ms Time] [2021-11-13 18:01:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 18:01:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 53. [2021-11-13 18:01:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 18:01:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-13 18:01:20,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2021-11-13 18:01:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:20,119 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-13 18:01:20,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-13 18:01:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 18:01:20,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:20,120 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:20,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:20,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:01:20,321 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 13 times [2021-11-13 18:01:20,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:20,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232658818] [2021-11-13 18:01:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:20,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:20,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:20,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232658818] [2021-11-13 18:01:20,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232658818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:20,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325588090] [2021-11-13 18:01:20,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:01:20,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:20,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:20,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:20,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:01:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:01:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:20,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:20,963 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 25 [2021-11-13 18:01:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:20,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:21,105 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 16 treesize of output 14 [2021-11-13 18:01:21,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-13 18:01:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:21,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325588090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:21,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:21,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2021-11-13 18:01:21,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003416079] [2021-11-13 18:01:21,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:21,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:01:21,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:01:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:01:21,221 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 25 states have internal predecessors, (86), 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 18:01:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:21,769 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2021-11-13 18:01:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:01:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 25 states have internal predecessors, (86), 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 52 [2021-11-13 18:01:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:21,770 INFO L225 Difference]: With dead ends: 108 [2021-11-13 18:01:21,770 INFO L226 Difference]: Without dead ends: 106 [2021-11-13 18:01:21,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:01:21,772 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 320.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:21,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 243 Invalid, 761 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [70 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 320.42ms Time] [2021-11-13 18:01:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-13 18:01:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2021-11-13 18:01:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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 18:01:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-13 18:01:21,783 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2021-11-13 18:01:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:21,783 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-13 18:01:21,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 25 states have internal predecessors, (86), 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 18:01:21,784 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-13 18:01:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:01:21,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:21,784 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:21,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:21,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:01:21,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:21,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 14 times [2021-11-13 18:01:21,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:21,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431699336] [2021-11-13 18:01:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:21,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:22,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:22,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431699336] [2021-11-13 18:01:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431699336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:22,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410599693] [2021-11-13 18:01:22,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:22,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:22,125 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:22,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:01:22,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:01:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:22,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:22,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410599693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:22,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:22,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2021-11-13 18:01:22,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926586666] [2021-11-13 18:01:22,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:01:22,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:01:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:01:22,598 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 18:01:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:22,781 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-11-13 18:01:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:01:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 56 [2021-11-13 18:01:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:22,782 INFO L225 Difference]: With dead ends: 130 [2021-11-13 18:01:22,782 INFO L226 Difference]: Without dead ends: 95 [2021-11-13 18:01:22,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:01:22,783 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:22,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 88 Invalid, 207 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [57 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 107.99ms Time] [2021-11-13 18:01:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-13 18:01:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2021-11-13 18:01:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-13 18:01:22,793 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2021-11-13 18:01:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:22,793 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-13 18:01:22,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 18:01:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-13 18:01:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 18:01:22,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:22,795 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:22,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:23,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:23,008 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2011531273, now seen corresponding path program 15 times [2021-11-13 18:01:23,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:23,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185068195] [2021-11-13 18:01:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:23,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:23,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:23,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185068195] [2021-11-13 18:01:23,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185068195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:23,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254504081] [2021-11-13 18:01:23,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:23,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:23,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:23,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:23,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:01:23,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 18:01:23,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:01:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:23,639 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:23,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:01:23,694 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:23,694 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 37 treesize of output 39 [2021-11-13 18:01:23,908 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:23,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:01:24,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:24,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:24,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-13 18:01:24,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592565846] [2021-11-13 18:01:24,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:24,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:01:24,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:01:24,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:01:24,336 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:24,923 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-11-13 18:01:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:01:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-13 18:01:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:24,925 INFO L225 Difference]: With dead ends: 95 [2021-11-13 18:01:24,925 INFO L226 Difference]: Without dead ends: 93 [2021-11-13 18:01:24,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:01:24,926 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 241.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 288.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:24,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 187 Invalid, 705 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [50 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 288.64ms Time] [2021-11-13 18:01:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-13 18:01:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-11-13 18:01:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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 18:01:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-13 18:01:24,942 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2021-11-13 18:01:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:24,943 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-13 18:01:24,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-13 18:01:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 18:01:24,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:24,944 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:24,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:25,160 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 16 times [2021-11-13 18:01:25,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:25,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468207817] [2021-11-13 18:01:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:25,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:25,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:25,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468207817] [2021-11-13 18:01:25,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468207817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:25,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665563654] [2021-11-13 18:01:25,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:25,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:25,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:25,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:01:25,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:25,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:25,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 18:01:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:25,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:25,904 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 25 [2021-11-13 18:01:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:25,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:26,089 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 16 treesize of output 14 [2021-11-13 18:01:26,091 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 32 treesize of output 28 [2021-11-13 18:01:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665563654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:26,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:26,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 28 [2021-11-13 18:01:26,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997118050] [2021-11-13 18:01:26,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:26,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 18:01:26,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 18:01:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:01:26,237 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 28 states have internal predecessors, (98), 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 18:01:27,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:27,092 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-11-13 18:01:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:01:27,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 28 states have internal predecessors, (98), 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 60 [2021-11-13 18:01:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:27,094 INFO L225 Difference]: With dead ends: 120 [2021-11-13 18:01:27,096 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:01:27,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2409, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:01:27,100 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 426.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:27,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 350 Invalid, 1085 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [94 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 504.32ms Time] [2021-11-13 18:01:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:01:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-11-13 18:01:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 18:01:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-13 18:01:27,127 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2021-11-13 18:01:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:27,127 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-13 18:01:27,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 28 states have internal predecessors, (98), 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 18:01:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-13 18:01:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:01:27,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:27,138 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:27,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:27,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:27,360 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 17 times [2021-11-13 18:01:27,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:27,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575120518] [2021-11-13 18:01:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:27,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:27,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:27,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575120518] [2021-11-13 18:01:27,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575120518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:27,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127954137] [2021-11-13 18:01:27,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:01:27,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:27,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:27,524 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:01:27,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-13 18:01:27,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:01:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:27,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:28,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127954137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:28,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:28,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2021-11-13 18:01:28,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545583352] [2021-11-13 18:01:28,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:28,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 18:01:28,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 18:01:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:01:28,126 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 18:01:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:28,328 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-11-13 18:01:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:01:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 64 [2021-11-13 18:01:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:28,330 INFO L225 Difference]: With dead ends: 146 [2021-11-13 18:01:28,330 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 18:01:28,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:01:28,331 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:28,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 115 Invalid, 263 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [56 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 119.75ms Time] [2021-11-13 18:01:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 18:01:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2021-11-13 18:01:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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 18:01:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-11-13 18:01:28,342 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 64 [2021-11-13 18:01:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:28,342 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-11-13 18:01:28,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 18:01:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-11-13 18:01:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:01:28,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:28,343 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:28,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:28,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 18:01:28,556 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -846428632, now seen corresponding path program 18 times [2021-11-13 18:01:28,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:28,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555349617] [2021-11-13 18:01:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:28,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 1 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:28,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:28,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555349617] [2021-11-13 18:01:28,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555349617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:28,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106268868] [2021-11-13 18:01:28,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:01:28,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:28,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:28,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:01:29,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-13 18:01:29,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 18:01:29,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:29,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:29,274 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:29,274 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 18:01:29,323 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:29,324 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 37 treesize of output 39 [2021-11-13 18:01:29,487 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:29,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:01:29,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:29,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:29,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-13 18:01:29,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662879699] [2021-11-13 18:01:29,836 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:29,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:01:29,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:01:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:01:29,837 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:30,725 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-11-13 18:01:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:01:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-13 18:01:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:30,727 INFO L225 Difference]: With dead ends: 107 [2021-11-13 18:01:30,727 INFO L226 Difference]: Without dead ends: 105 [2021-11-13 18:01:30,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:01:30,729 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 403.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 491.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:30,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 275 Invalid, 1001 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [57 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 491.41ms Time] [2021-11-13 18:01:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-13 18:01:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2021-11-13 18:01:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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 18:01:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-13 18:01:30,741 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2021-11-13 18:01:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:30,742 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-13 18:01:30,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-13 18:01:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:01:30,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:30,743 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:30,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:30,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:01:30,964 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 19 times [2021-11-13 18:01:30,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:30,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683739657] [2021-11-13 18:01:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:30,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:31,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:31,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683739657] [2021-11-13 18:01:31,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683739657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:31,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282448409] [2021-11-13 18:01:31,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:01:31,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:31,277 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:31,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:01:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:31,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 18:01:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:31,798 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 25 [2021-11-13 18:01:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:31,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:31,970 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 16 treesize of output 14 [2021-11-13 18:01:31,972 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 32 treesize of output 28 [2021-11-13 18:01:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:32,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282448409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:32,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:32,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 31 [2021-11-13 18:01:32,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971141719] [2021-11-13 18:01:32,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:32,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:01:32,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:01:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:01:32,114 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 18:01:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:33,013 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2021-11-13 18:01:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 18:01:33,013 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-13 18:01:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:33,014 INFO L225 Difference]: With dead ends: 132 [2021-11-13 18:01:33,014 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:01:33,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=3035, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:01:33,016 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 447.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 555.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:33,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 460 Invalid, 1449 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [90 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 555.92ms Time] [2021-11-13 18:01:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:01:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2021-11-13 18:01:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 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 18:01:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-13 18:01:33,039 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2021-11-13 18:01:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-13 18:01:33,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 18:01:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-13 18:01:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:01:33,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:33,040 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:33,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:33,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:33,241 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 20 times [2021-11-13 18:01:33,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:33,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266800363] [2021-11-13 18:01:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:33,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:33,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:33,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266800363] [2021-11-13 18:01:33,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266800363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:33,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395539951] [2021-11-13 18:01:33,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:33,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:33,428 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:33,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:01:33,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:33,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:01:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:33,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:34,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395539951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:34,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:34,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-11-13 18:01:34,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751691252] [2021-11-13 18:01:34,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:34,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:01:34,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:01:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:01:34,029 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 18:01:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:34,275 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2021-11-13 18:01:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 18:01:34,275 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 72 [2021-11-13 18:01:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:34,276 INFO L225 Difference]: With dead ends: 162 [2021-11-13 18:01:34,276 INFO L226 Difference]: Without dead ends: 119 [2021-11-13 18:01:34,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:01:34,278 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 146 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:34,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 131 Invalid, 281 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [57 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 136.77ms Time] [2021-11-13 18:01:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-13 18:01:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-11-13 18:01:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-13 18:01:34,294 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 72 [2021-11-13 18:01:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:34,294 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-13 18:01:34,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 18:01:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-13 18:01:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:01:34,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:34,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:34,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:34,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:34,504 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:34,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1199298343, now seen corresponding path program 21 times [2021-11-13 18:01:34,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:34,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856691208] [2021-11-13 18:01:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:34,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:34,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:34,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856691208] [2021-11-13 18:01:34,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856691208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:34,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640900151] [2021-11-13 18:01:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:34,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:34,940 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:34,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 18:01:35,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-13 18:01:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-13 18:01:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:35,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:35,475 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-13 18:01:35,525 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:35,525 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 37 treesize of output 39 [2021-11-13 18:01:35,675 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:35,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:01:35,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:35,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:35,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-13 18:01:35,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526771230] [2021-11-13 18:01:35,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:35,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:01:35,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:01:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:01:35,976 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 18:01:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:36,860 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2021-11-13 18:01:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:01:36,861 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), 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 76 [2021-11-13 18:01:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:36,861 INFO L225 Difference]: With dead ends: 119 [2021-11-13 18:01:36,862 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 18:01:36,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:01:36,863 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 363.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 446.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:36,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 309 Invalid, 1123 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [64 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 446.21ms Time] [2021-11-13 18:01:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 18:01:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2021-11-13 18:01:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-11-13 18:01:36,884 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2021-11-13 18:01:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:36,885 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-11-13 18:01:36,885 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), 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 18:01:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-11-13 18:01:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:01:36,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:36,886 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:36,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-13 18:01:37,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:01:37,112 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 22 times [2021-11-13 18:01:37,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:37,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673934106] [2021-11-13 18:01:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:37,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:37,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:37,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673934106] [2021-11-13 18:01:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673934106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:37,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241456021] [2021-11-13 18:01:37,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:37,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:37,478 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:37,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:01:37,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 18:01:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:37,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:38,098 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 25 [2021-11-13 18:01:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:38,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:38,282 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 16 treesize of output 14 [2021-11-13 18:01:38,284 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 32 treesize of output 28 [2021-11-13 18:01:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241456021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:38,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:38,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 34 [2021-11-13 18:01:38,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713857054] [2021-11-13 18:01:38,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:38,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:01:38,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:01:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:01:38,480 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 34 states have internal predecessors, (122), 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 18:01:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:39,488 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2021-11-13 18:01:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 18:01:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 34 states have internal predecessors, (122), 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 76 [2021-11-13 18:01:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:39,490 INFO L225 Difference]: With dead ends: 144 [2021-11-13 18:01:39,490 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 18:01:39,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=3733, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:01:39,492 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 497.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 594.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:39,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 497 Invalid, 1545 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [122 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 594.75ms Time] [2021-11-13 18:01:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 18:01:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2021-11-13 18:01:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-11-13 18:01:39,506 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 76 [2021-11-13 18:01:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:39,507 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-11-13 18:01:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 34 states have internal predecessors, (122), 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 18:01:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-11-13 18:01:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:01:39,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:39,508 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:39,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-13 18:01:39,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:01:39,709 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 23 times [2021-11-13 18:01:39,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:39,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913793472] [2021-11-13 18:01:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:39,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:39,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:39,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913793472] [2021-11-13 18:01:39,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913793472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:39,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062749478] [2021-11-13 18:01:39,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:01:39,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:39,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:39,951 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:39,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 18:01:40,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-13 18:01:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:40,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:01:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:40,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062749478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:40,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:40,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2021-11-13 18:01:40,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835130653] [2021-11-13 18:01:40,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:40,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:01:40,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:01:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:01:40,869 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:41,140 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2021-11-13 18:01:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:01:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-13 18:01:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:41,141 INFO L225 Difference]: With dead ends: 178 [2021-11-13 18:01:41,141 INFO L226 Difference]: Without dead ends: 131 [2021-11-13 18:01:41,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:01:41,142 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:41,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 178 Invalid, 338 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 157.40ms Time] [2021-11-13 18:01:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-13 18:01:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-11-13 18:01:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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 18:01:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-11-13 18:01:41,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 80 [2021-11-13 18:01:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:41,157 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-11-13 18:01:41,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-11-13 18:01:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 18:01:41,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:41,158 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:41,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:41,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:01:41,359 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1640095734, now seen corresponding path program 24 times [2021-11-13 18:01:41,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:41,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587339954] [2021-11-13 18:01:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:41,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 1 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:41,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:41,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587339954] [2021-11-13 18:01:41,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587339954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:41,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416671002] [2021-11-13 18:01:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:01:41,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:41,812 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:41,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-13 18:01:42,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-13 18:01:42,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:01:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:42,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:42,444 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:42,444 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 18:01:42,503 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:42,503 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 40 treesize of output 42 [2021-11-13 18:01:42,618 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:42,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 66 [2021-11-13 18:01:42,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:42,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:42,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-13 18:01:42,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421185007] [2021-11-13 18:01:42,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:01:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:01:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:01:42,829 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:43,907 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2021-11-13 18:01:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 18:01:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-13 18:01:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:43,909 INFO L225 Difference]: With dead ends: 131 [2021-11-13 18:01:43,909 INFO L226 Difference]: Without dead ends: 129 [2021-11-13 18:01:43,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:01:43,911 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 447.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 536.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:43,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 402 Invalid, 1432 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [71 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 536.07ms Time] [2021-11-13 18:01:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-13 18:01:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 85. [2021-11-13 18:01:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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 18:01:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-11-13 18:01:43,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2021-11-13 18:01:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:43,933 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-11-13 18:01:43,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-11-13 18:01:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 18:01:43,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:43,934 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:43,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:44,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:01:44,135 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 25 times [2021-11-13 18:01:44,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:44,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225313183] [2021-11-13 18:01:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:44,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:44,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:44,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225313183] [2021-11-13 18:01:44,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225313183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:44,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100954436] [2021-11-13 18:01:44,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:01:44,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:44,556 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:44,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 18:01:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:01:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:44,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:01:45,160 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 47 treesize of output 31 [2021-11-13 18:01:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:45,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:45,606 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 16 treesize of output 14 [2021-11-13 18:01:45,609 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 32 treesize of output 28 [2021-11-13 18:01:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:45,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100954436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:45,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:45,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 45 [2021-11-13 18:01:45,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591543254] [2021-11-13 18:01:45,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:45,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 18:01:45,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 18:01:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:01:45,782 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 18:01:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:47,208 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2021-11-13 18:01:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-13 18:01:47,208 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 84 [2021-11-13 18:01:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:47,209 INFO L225 Difference]: With dead ends: 156 [2021-11-13 18:01:47,209 INFO L226 Difference]: Without dead ends: 154 [2021-11-13 18:01:47,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=366, Invalid=5640, Unknown=0, NotChecked=0, Total=6006 [2021-11-13 18:01:47,212 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 638.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 773.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:47,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 688 Invalid, 2028 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [116 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 773.92ms Time] [2021-11-13 18:01:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-13 18:01:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2021-11-13 18:01:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 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 18:01:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2021-11-13 18:01:47,231 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 84 [2021-11-13 18:01:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:47,232 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2021-11-13 18:01:47,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 18:01:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2021-11-13 18:01:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:01:47,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:47,233 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:47,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:47,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:47,434 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 26 times [2021-11-13 18:01:47,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:47,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785282989] [2021-11-13 18:01:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:47,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:47,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:47,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785282989] [2021-11-13 18:01:47,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785282989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:47,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121640280] [2021-11-13 18:01:47,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:47,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:47,689 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:47,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 18:01:47,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:47,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:01:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:48,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:48,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121640280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:48,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:48,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2021-11-13 18:01:48,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996361166] [2021-11-13 18:01:48,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:48,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:01:48,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:01:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:01:48,458 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 18:01:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:48,720 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2021-11-13 18:01:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:01:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 88 [2021-11-13 18:01:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:48,721 INFO L225 Difference]: With dead ends: 194 [2021-11-13 18:01:48,721 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 18:01:48,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:01:48,723 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 234 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:48,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 170 Invalid, 363 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [99 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 145.65ms Time] [2021-11-13 18:01:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 18:01:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2021-11-13 18:01:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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 18:01:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-11-13 18:01:48,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 88 [2021-11-13 18:01:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:48,740 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-11-13 18:01:48,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 18:01:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-11-13 18:01:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:01:48,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:48,741 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:48,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:48,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:48,944 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 479669179, now seen corresponding path program 27 times [2021-11-13 18:01:48,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:48,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076430345] [2021-11-13 18:01:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:48,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 1 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:49,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:49,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076430345] [2021-11-13 18:01:49,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076430345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:49,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076098822] [2021-11-13 18:01:49,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:49,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:49,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:49,495 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:49,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 18:01:50,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-13 18:01:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:50,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:01:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:50,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:50,603 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:01:50,603 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 26 treesize of output 25 [2021-11-13 18:01:50,652 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:01:50,653 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 37 treesize of output 39 [2021-11-13 18:01:50,855 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:01:50,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:01:51,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:01:51,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:51,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-13 18:01:51,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763718626] [2021-11-13 18:01:51,234 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:01:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:01:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:01:51,235 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 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 18:01:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:52,523 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2021-11-13 18:01:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-13 18:01:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 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 92 [2021-11-13 18:01:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:52,524 INFO L225 Difference]: With dead ends: 143 [2021-11-13 18:01:52,524 INFO L226 Difference]: Without dead ends: 141 [2021-11-13 18:01:52,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:01:52,525 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 548.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 652.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:52,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 505 Invalid, 1603 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [104 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 652.51ms Time] [2021-11-13 18:01:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-13 18:01:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 93. [2021-11-13 18:01:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 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 18:01:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-13 18:01:52,541 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2021-11-13 18:01:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:52,541 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-13 18:01:52,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 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 18:01:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-13 18:01:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:01:52,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:52,542 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:52,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-13 18:01:52,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 18:01:52,744 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 28 times [2021-11-13 18:01:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:52,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644629627] [2021-11-13 18:01:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:52,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:53,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:53,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644629627] [2021-11-13 18:01:53,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644629627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:53,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921024552] [2021-11-13 18:01:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:53,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:53,216 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:53,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-13 18:01:53,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 18:01:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:53,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:01:54,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-13 18:01:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:54,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:54,196 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 16 treesize of output 14 [2021-11-13 18:01:54,198 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 32 treesize of output 28 [2021-11-13 18:01:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:54,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921024552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:54,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:54,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 40 [2021-11-13 18:01:54,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266422662] [2021-11-13 18:01:54,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:54,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-13 18:01:54,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-13 18:01:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:01:54,401 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:55,773 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2021-11-13 18:01:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-13 18:01:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-13 18:01:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:55,774 INFO L225 Difference]: With dead ends: 168 [2021-11-13 18:01:55,774 INFO L226 Difference]: Without dead ends: 166 [2021-11-13 18:01:55,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=5345, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:01:55,775 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 674.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 812.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:55,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 719 Invalid, 2238 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [124 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 812.29ms Time] [2021-11-13 18:01:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-13 18:01:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 109. [2021-11-13 18:01:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 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 18:01:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2021-11-13 18:01:55,792 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 92 [2021-11-13 18:01:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:55,793 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2021-11-13 18:01:55,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2021-11-13 18:01:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 18:01:55,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:55,794 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:55,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-13 18:01:56,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:56,004 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 29 times [2021-11-13 18:01:56,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:56,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367294958] [2021-11-13 18:01:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:56,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:56,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:56,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367294958] [2021-11-13 18:01:56,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367294958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:56,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592886168] [2021-11-13 18:01:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:01:56,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:56,280 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:56,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 18:01:56,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-13 18:01:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:01:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:57,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592886168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:57,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:57,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2021-11-13 18:01:57,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672869239] [2021-11-13 18:01:57,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:57,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-13 18:01:57,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-13 18:01:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:01:57,494 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:57,809 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-11-13 18:01:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:01:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-13 18:01:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:57,810 INFO L225 Difference]: With dead ends: 210 [2021-11-13 18:01:57,811 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 18:01:57,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:01:57,812 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:57,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 207 Invalid, 373 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [74 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 158.67ms Time] [2021-11-13 18:01:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 18:01:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-11-13 18:01:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-11-13 18:01:57,839 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 96 [2021-11-13 18:01:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:57,839 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-11-13 18:01:57,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-11-13 18:01:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:01:57,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:57,840 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:57,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:58,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-13 18:01:58,058 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash -905180180, now seen corresponding path program 30 times [2021-11-13 18:01:58,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:58,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313867990] [2021-11-13 18:01:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:58,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 1 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:58,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:58,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313867990] [2021-11-13 18:01:58,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313867990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:58,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350114799] [2021-11-13 18:01:58,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:01:58,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:58,663 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:58,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-13 18:01:59,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-13 18:01:59,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 18:01:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:01:59,801 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 18:01:59,801 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 31 treesize of output 30 [2021-11-13 18:01:59,854 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-13 18:01:59,855 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 42 treesize of output 44 [2021-11-13 18:02:00,021 INFO L354 Elim1Store]: treesize reduction 120, result has 22.1 percent of original size [2021-11-13 18:02:00,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 62 [2021-11-13 18:02:00,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:02:00,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:02:00,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-13 18:02:00,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121577704] [2021-11-13 18:02:00,182 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:00,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:02:00,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:02:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:02:00,183 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 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 18:02:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:01,584 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2021-11-13 18:02:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 18:02:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 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 100 [2021-11-13 18:02:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:01,586 INFO L225 Difference]: With dead ends: 155 [2021-11-13 18:02:01,586 INFO L226 Difference]: Without dead ends: 153 [2021-11-13 18:02:01,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:02:01,586 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 710.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:01,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 552 Invalid, 1887 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [88 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 710.62ms Time] [2021-11-13 18:02:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-13 18:02:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 101. [2021-11-13 18:02:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-13 18:02:01,604 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2021-11-13 18:02:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-13 18:02:01,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 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 18:02:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-13 18:02:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:02:01,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:01,605 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:01,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:01,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-13 18:02:01,805 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:01,806 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 31 times [2021-11-13 18:02:01,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:01,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842587815] [2021-11-13 18:02:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:01,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:02,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:02,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842587815] [2021-11-13 18:02:02,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842587815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:02,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805181061] [2021-11-13 18:02:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:02:02,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:02,301 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:02,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-13 18:02:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:02,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 18:02:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:02:03,090 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 25 [2021-11-13 18:02:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:03,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:03,288 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 16 treesize of output 14 [2021-11-13 18:02:03,289 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 32 treesize of output 28 [2021-11-13 18:02:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:03,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805181061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:03,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:03,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2021-11-13 18:02:03,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812186407] [2021-11-13 18:02:03,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:03,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:02:03,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:02:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1669, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:02:03,480 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 18:02:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:05,104 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2021-11-13 18:02:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-13 18:02:05,105 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 100 [2021-11-13 18:02:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:05,106 INFO L225 Difference]: With dead ends: 180 [2021-11-13 18:02:05,106 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 18:02:05,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=383, Invalid=6259, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:02:05,107 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 151 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 779.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 935.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:05,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 788 Invalid, 2572 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [161 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 935.93ms Time] [2021-11-13 18:02:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 18:02:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2021-11-13 18:02:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-11-13 18:02:05,134 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 100 [2021-11-13 18:02:05,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:05,134 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-11-13 18:02:05,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 18:02:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-11-13 18:02:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:02:05,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:05,135 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:05,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:05,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-13 18:02:05,335 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 32 times [2021-11-13 18:02:05,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:05,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394295499] [2021-11-13 18:02:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:05,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:05,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:05,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394295499] [2021-11-13 18:02:05,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394295499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:05,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329694234] [2021-11-13 18:02:05,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:02:05,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:05,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:05,653 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:05,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 18:02:05,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:02:05,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:05,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:02:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:06,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329694234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:06,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:06,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2021-11-13 18:02:06,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670327895] [2021-11-13 18:02:06,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:06,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:02:06,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:02:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:02:06,503 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 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 18:02:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:06,822 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2021-11-13 18:02:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:02:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 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 104 [2021-11-13 18:02:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:06,823 INFO L225 Difference]: With dead ends: 226 [2021-11-13 18:02:06,823 INFO L226 Difference]: Without dead ends: 167 [2021-11-13 18:02:06,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:02:06,824 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:06,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 208 Invalid, 391 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [79 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 156.55ms Time] [2021-11-13 18:02:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-13 18:02:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2021-11-13 18:02:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 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 18:02:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-11-13 18:02:06,857 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 104 [2021-11-13 18:02:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:06,857 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-11-13 18:02:06,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 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 18:02:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-11-13 18:02:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 18:02:06,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:06,858 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:06,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:07,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-13 18:02:07,076 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash -440827747, now seen corresponding path program 33 times [2021-11-13 18:02:07,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:07,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438488007] [2021-11-13 18:02:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:07,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 1 proven. 619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:07,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:07,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438488007] [2021-11-13 18:02:07,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438488007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:07,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748807726] [2021-11-13 18:02:07,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:02:07,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:07,622 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:07,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-13 18:02:08,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-13 18:02:08,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-13 18:02:08,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:09,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:02:09,190 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:02:09,190 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 18:02:09,256 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:02:09,257 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 37 treesize of output 39 [2021-11-13 18:02:09,452 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:02:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:02:09,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:02:09,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:02:09,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-13 18:02:09,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816561265] [2021-11-13 18:02:09,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:09,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:02:09,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:09,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:02:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:02:09,776 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 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 18:02:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:11,414 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2021-11-13 18:02:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-13 18:02:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 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 108 [2021-11-13 18:02:11,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:11,416 INFO L225 Difference]: With dead ends: 167 [2021-11-13 18:02:11,416 INFO L226 Difference]: Without dead ends: 165 [2021-11-13 18:02:11,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=4660, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:02:11,417 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 704.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 840.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:11,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 674 Invalid, 2285 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [95 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 840.82ms Time] [2021-11-13 18:02:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-13 18:02:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 109. [2021-11-13 18:02:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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 18:02:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-11-13 18:02:11,449 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2021-11-13 18:02:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:11,450 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-11-13 18:02:11,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 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 18:02:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-11-13 18:02:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 18:02:11,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:11,451 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:11,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:11,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:11,664 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 34 times [2021-11-13 18:02:11,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:11,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162615926] [2021-11-13 18:02:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:11,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:12,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:12,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162615926] [2021-11-13 18:02:12,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162615926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:12,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666503228] [2021-11-13 18:02:12,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:02:12,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:12,527 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-13 18:02:12,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:02:12,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 18:02:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:02:13,508 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 25 [2021-11-13 18:02:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:13,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:14,095 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 16 treesize of output 14 [2021-11-13 18:02:14,097 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 32 treesize of output 28 [2021-11-13 18:02:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666503228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:14,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:14,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 72 [2021-11-13 18:02:14,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706526921] [2021-11-13 18:02:14,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-13 18:02:14,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-13 18:02:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=4811, Unknown=0, NotChecked=0, Total=5112 [2021-11-13 18:02:14,235 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 72 states, 72 states have (on average 3.6944444444444446) internal successors, (266), 72 states have internal predecessors, (266), 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 18:02:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:16,696 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2021-11-13 18:02:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-13 18:02:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6944444444444446) internal successors, (266), 72 states have internal predecessors, (266), 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 108 [2021-11-13 18:02:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:16,697 INFO L225 Difference]: With dead ends: 192 [2021-11-13 18:02:16,697 INFO L226 Difference]: Without dead ends: 190 [2021-11-13 18:02:16,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3902 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=621, Invalid=12261, Unknown=0, NotChecked=0, Total=12882 [2021-11-13 18:02:16,700 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 203 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 3910 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1197.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 4122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 3910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1438.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:16,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1317 Invalid, 4122 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [212 Valid, 3910 Invalid, 0 Unknown, 0 Unchecked, 1438.19ms Time] [2021-11-13 18:02:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-13 18:02:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 125. [2021-11-13 18:02:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-11-13 18:02:16,744 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 108 [2021-11-13 18:02:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:16,744 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-11-13 18:02:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6944444444444446) internal successors, (266), 72 states have internal predecessors, (266), 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 18:02:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-11-13 18:02:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:02:16,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:16,746 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:16,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-13 18:02:16,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-13 18:02:16,960 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 35 times [2021-11-13 18:02:16,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:16,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404026892] [2021-11-13 18:02:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:16,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:17,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:17,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404026892] [2021-11-13 18:02:17,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404026892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:17,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401722595] [2021-11-13 18:02:17,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:02:17,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:17,305 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:17,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-13 18:02:17,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-13 18:02:17,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:02:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:18,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401722595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:18,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:18,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2021-11-13 18:02:18,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981937745] [2021-11-13 18:02:18,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:18,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:02:18,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:02:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:02:18,613 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 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 18:02:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:18,991 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2021-11-13 18:02:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 18:02:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 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 112 [2021-11-13 18:02:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:18,993 INFO L225 Difference]: With dead ends: 242 [2021-11-13 18:02:18,993 INFO L226 Difference]: Without dead ends: 179 [2021-11-13 18:02:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:02:18,995 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 269 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:18,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 201 Invalid, 408 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [105 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 192.55ms Time] [2021-11-13 18:02:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-13 18:02:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2021-11-13 18:02:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 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 18:02:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-11-13 18:02:19,034 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 112 [2021-11-13 18:02:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:19,034 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-11-13 18:02:19,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 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 18:02:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-11-13 18:02:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:02:19,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:19,036 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:19,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:19,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-13 18:02:19,252 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash 123488718, now seen corresponding path program 36 times [2021-11-13 18:02:19,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:19,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564637303] [2021-11-13 18:02:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:19,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 1 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:20,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:20,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564637303] [2021-11-13 18:02:20,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564637303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:20,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390346712] [2021-11-13 18:02:20,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:02:20,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:20,103 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:20,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-13 18:02:21,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-13 18:02:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:21,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-13 18:02:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:22,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:02:22,213 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:02:22,213 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 18:02:22,269 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:02:22,270 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 37 treesize of output 39 [2021-11-13 18:02:22,431 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:02:22,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:02:22,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:02:22,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:02:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-13 18:02:22,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231870705] [2021-11-13 18:02:22,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:02:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:02:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2474, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:02:22,723 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 18:02:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:23,938 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2021-11-13 18:02:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:02:23,938 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 116 [2021-11-13 18:02:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:23,940 INFO L225 Difference]: With dead ends: 179 [2021-11-13 18:02:23,940 INFO L226 Difference]: Without dead ends: 177 [2021-11-13 18:02:23,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=3999, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:02:23,941 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 109 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 635.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.64ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 771.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:23,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 563 Invalid, 1737 Unknown, 0 Unchecked, 3.64ms Time], IncrementalHoareTripleChecker [112 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 771.80ms Time] [2021-11-13 18:02:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-13 18:02:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 117. [2021-11-13 18:02:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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 18:02:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-11-13 18:02:23,979 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2021-11-13 18:02:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:23,979 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-11-13 18:02:23,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 18:02:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-11-13 18:02:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:02:23,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:23,980 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:24,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:24,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:24,181 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 37 times [2021-11-13 18:02:24,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:24,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314130710] [2021-11-13 18:02:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:24,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:24,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314130710] [2021-11-13 18:02:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314130710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185948515] [2021-11-13 18:02:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:02:24,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:24,881 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:24,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-13 18:02:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:24,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-13 18:02:24,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:25,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:02:25,864 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 25 [2021-11-13 18:02:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:26,091 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 16 treesize of output 14 [2021-11-13 18:02:26,102 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 32 treesize of output 28 [2021-11-13 18:02:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185948515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:26,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 49 [2021-11-13 18:02:26,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86526094] [2021-11-13 18:02:26,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:26,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:02:26,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:02:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2195, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:02:26,346 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 49 states, 49 states have (on average 3.7142857142857144) internal successors, (182), 49 states have internal predecessors, (182), 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 18:02:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:28,316 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2021-11-13 18:02:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-13 18:02:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.7142857142857144) internal successors, (182), 49 states have internal predecessors, (182), 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 116 [2021-11-13 18:02:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:28,318 INFO L225 Difference]: With dead ends: 204 [2021-11-13 18:02:28,318 INFO L226 Difference]: Without dead ends: 202 [2021-11-13 18:02:28,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 209 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=439, Invalid=8303, Unknown=0, NotChecked=0, Total=8742 [2021-11-13 18:02:28,319 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 173 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 3053 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 946.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 3053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1138.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:28,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1059 Invalid, 3241 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [188 Valid, 3053 Invalid, 0 Unknown, 0 Unchecked, 1138.74ms Time] [2021-11-13 18:02:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-13 18:02:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 133. [2021-11-13 18:02:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 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 18:02:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2021-11-13 18:02:28,363 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 116 [2021-11-13 18:02:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:28,364 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2021-11-13 18:02:28,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.7142857142857144) internal successors, (182), 49 states have internal predecessors, (182), 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 18:02:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2021-11-13 18:02:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 18:02:28,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:28,365 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:28,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:28,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-13 18:02:28,588 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 38 times [2021-11-13 18:02:28,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:28,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269977877] [2021-11-13 18:02:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:28,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:28,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:28,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269977877] [2021-11-13 18:02:28,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269977877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:28,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751870026] [2021-11-13 18:02:28,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:02:28,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:28,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:28,968 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:28,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-13 18:02:29,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:02:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:02:29,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:29,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751870026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:29,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:29,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2021-11-13 18:02:29,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414940076] [2021-11-13 18:02:29,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:30,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:02:30,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:02:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1789, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:02:30,000 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:30,399 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2021-11-13 18:02:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:02:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-13 18:02:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:30,400 INFO L225 Difference]: With dead ends: 258 [2021-11-13 18:02:30,400 INFO L226 Difference]: Without dead ends: 191 [2021-11-13 18:02:30,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:02:30,401 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 262 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:30,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 274 Invalid, 496 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [114 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 194.53ms Time] [2021-11-13 18:02:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-13 18:02:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2021-11-13 18:02:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2021-11-13 18:02:30,446 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 120 [2021-11-13 18:02:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:30,446 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2021-11-13 18:02:30,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2021-11-13 18:02:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:02:30,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:30,448 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:30,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-13 18:02:30,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:30,652 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash -816765057, now seen corresponding path program 39 times [2021-11-13 18:02:30,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:30,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171149962] [2021-11-13 18:02:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:30,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 1 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:31,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:31,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171149962] [2021-11-13 18:02:31,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171149962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:31,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237802768] [2021-11-13 18:02:31,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:02:31,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:31,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:31,444 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:31,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-13 18:02:34,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-13 18:02:34,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-13 18:02:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:34,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:02:34,870 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:02:34,870 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 18:02:34,933 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:02:34,933 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 40 treesize of output 42 [2021-11-13 18:02:35,058 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:02:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 66 [2021-11-13 18:02:35,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:02:35,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:02:35,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-13 18:02:35,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724759404] [2021-11-13 18:02:35,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:35,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:02:35,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:02:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:02:35,268 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 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 18:02:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:37,402 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-11-13 18:02:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-13 18:02:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 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 124 [2021-11-13 18:02:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:37,403 INFO L225 Difference]: With dead ends: 191 [2021-11-13 18:02:37,403 INFO L226 Difference]: Without dead ends: 189 [2021-11-13 18:02:37,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=344, Invalid=5976, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:02:37,404 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 92 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 918.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.48ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1098.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:37,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 925 Invalid, 2979 Unknown, 0 Unchecked, 4.48ms Time], IncrementalHoareTripleChecker [109 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 1098.32ms Time] [2021-11-13 18:02:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-13 18:02:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 125. [2021-11-13 18:02:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 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 18:02:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-11-13 18:02:37,448 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 124 [2021-11-13 18:02:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-11-13 18:02:37,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 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 18:02:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-11-13 18:02:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:02:37,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:37,449 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:37,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-13 18:02:37,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-13 18:02:37,649 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 40 times [2021-11-13 18:02:37,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:37,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276405753] [2021-11-13 18:02:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:37,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:38,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:38,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276405753] [2021-11-13 18:02:38,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276405753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:38,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331427006] [2021-11-13 18:02:38,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:02:38,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:38,468 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:38,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-13 18:02:38,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:02:38,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-13 18:02:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:02:39,720 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 25 [2021-11-13 18:02:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:39,967 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 16 treesize of output 14 [2021-11-13 18:02:39,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-13 18:02:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:40,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331427006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:40,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:40,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 52 [2021-11-13 18:02:40,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105681217] [2021-11-13 18:02:40,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:40,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-13 18:02:40,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-13 18:02:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2485, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:02:40,220 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 52 states, 52 states have (on average 3.730769230769231) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:42,503 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2021-11-13 18:02:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-13 18:02:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.730769230769231) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-13 18:02:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:42,504 INFO L225 Difference]: With dead ends: 216 [2021-11-13 18:02:42,505 INFO L226 Difference]: Without dead ends: 214 [2021-11-13 18:02:42,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=467, Invalid=9433, Unknown=0, NotChecked=0, Total=9900 [2021-11-13 18:02:42,506 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 181 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1122.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.63ms SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1346.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:42,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1207 Invalid, 3849 Unknown, 0 Unchecked, 5.63ms Time], IncrementalHoareTripleChecker [200 Valid, 3649 Invalid, 0 Unknown, 0 Unchecked, 1346.27ms Time] [2021-11-13 18:02:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-13 18:02:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 141. [2021-11-13 18:02:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 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 18:02:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2021-11-13 18:02:42,541 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 124 [2021-11-13 18:02:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2021-11-13 18:02:42,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.730769230769231) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2021-11-13 18:02:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:02:42,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:42,543 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:42,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-13 18:02:42,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-13 18:02:42,764 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 41 times [2021-11-13 18:02:42,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:42,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126051698] [2021-11-13 18:02:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:42,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:43,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:43,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126051698] [2021-11-13 18:02:43,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126051698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:43,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467054451] [2021-11-13 18:02:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:02:43,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:43,206 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:43,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-13 18:02:44,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-13 18:02:44,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:44,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 18:02:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:45,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:45,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467054451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:45,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:45,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2021-11-13 18:02:45,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178785797] [2021-11-13 18:02:45,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:45,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-13 18:02:45,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-13 18:02:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:02:45,280 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:45,747 INFO L93 Difference]: Finished difference Result 274 states and 277 transitions. [2021-11-13 18:02:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:02:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-13 18:02:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:45,751 INFO L225 Difference]: With dead ends: 274 [2021-11-13 18:02:45,751 INFO L226 Difference]: Without dead ends: 203 [2021-11-13 18:02:45,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:02:45,752 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 291 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 213.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:45,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 257 Invalid, 489 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [114 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 213.47ms Time] [2021-11-13 18:02:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-13 18:02:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2021-11-13 18:02:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 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 18:02:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-11-13 18:02:45,789 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 128 [2021-11-13 18:02:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:45,789 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-11-13 18:02:45,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-11-13 18:02:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 18:02:45,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:45,790 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:45,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:45,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:45,991 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1768629840, now seen corresponding path program 42 times [2021-11-13 18:02:45,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:45,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818234830] [2021-11-13 18:02:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:45,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 1 proven. 952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:46,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:46,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818234830] [2021-11-13 18:02:46,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818234830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:46,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287452466] [2021-11-13 18:02:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:02:46,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:46,952 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-13 18:02:48,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-11-13 18:02:48,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 18:02:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:49,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:02:49,613 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 18:02:49,613 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 31 treesize of output 30 [2021-11-13 18:02:49,688 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-13 18:02:49,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-11-13 18:02:50,070 INFO L354 Elim1Store]: treesize reduction 156, result has 22.8 percent of original size [2021-11-13 18:02:50,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 84 [2021-11-13 18:02:50,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:02:50,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:02:50,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-11-13 18:02:50,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261099307] [2021-11-13 18:02:50,525 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:50,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:02:50,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:02:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=3160, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:02:50,526 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:53,106 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2021-11-13 18:02:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-13 18:02:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-13 18:02:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:53,108 INFO L225 Difference]: With dead ends: 203 [2021-11-13 18:02:53,108 INFO L226 Difference]: Without dead ends: 201 [2021-11-13 18:02:53,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=987, Invalid=9725, Unknown=0, NotChecked=0, Total=10712 [2021-11-13 18:02:53,110 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 988.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.89ms SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1178.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:53,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 987 Invalid, 3205 Unknown, 0 Unchecked, 4.89ms Time], IncrementalHoareTripleChecker [146 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 1178.71ms Time] [2021-11-13 18:02:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-13 18:02:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 133. [2021-11-13 18:02:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 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 18:02:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-11-13 18:02:53,169 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 132 [2021-11-13 18:02:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:53,170 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-11-13 18:02:53,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-11-13 18:02:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 18:02:53,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:53,171 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:53,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:53,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:53,396 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 43 times [2021-11-13 18:02:53,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:53,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913126314] [2021-11-13 18:02:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:53,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:54,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:54,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913126314] [2021-11-13 18:02:54,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913126314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:54,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519134562] [2021-11-13 18:02:54,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:02:54,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:54,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:54,280 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:54,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-13 18:02:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 18:02:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:54,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:02:55,431 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 25 [2021-11-13 18:02:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:55,704 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 16 treesize of output 14 [2021-11-13 18:02:55,705 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 32 treesize of output 28 [2021-11-13 18:02:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:55,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519134562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:55,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:02:55,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2021-11-13 18:02:55,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997548419] [2021-11-13 18:02:55,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:55,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 18:02:55,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 18:02:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2793, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:02:55,964 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 55 states have internal predecessors, (206), 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 18:02:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:58,610 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2021-11-13 18:02:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-13 18:02:58,615 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 55 states have internal predecessors, (206), 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 132 [2021-11-13 18:02:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:58,617 INFO L225 Difference]: With dead ends: 228 [2021-11-13 18:02:58,617 INFO L226 Difference]: Without dead ends: 226 [2021-11-13 18:02:58,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 239 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=495, Invalid=10635, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 18:02:58,618 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 154 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 4122 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1292.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 4303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 4122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1548.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:58,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1495 Invalid, 4303 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [181 Valid, 4122 Invalid, 0 Unknown, 0 Unchecked, 1548.98ms Time] [2021-11-13 18:02:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-13 18:02:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 149. [2021-11-13 18:02:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-11-13 18:02:58,666 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 132 [2021-11-13 18:02:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:58,666 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-11-13 18:02:58,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 55 states have internal predecessors, (206), 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 18:02:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-11-13 18:02:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 18:02:58,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:58,667 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:58,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:58,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-13 18:02:58,868 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1812265441, now seen corresponding path program 44 times [2021-11-13 18:02:58,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:58,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115991443] [2021-11-13 18:02:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:58,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 451 proven. 557 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:59,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:59,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115991443] [2021-11-13 18:02:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115991443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:59,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921270003] [2021-11-13 18:02:59,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:02:59,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:59,352 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:59,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-13 18:02:59,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:02:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 18:02:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:00,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921270003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:00,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:00,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2021-11-13 18:03:00,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428342116] [2021-11-13 18:03:00,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:00,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 18:03:00,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 18:03:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:03:00,650 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 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 18:03:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:01,158 INFO L93 Difference]: Finished difference Result 290 states and 293 transitions. [2021-11-13 18:03:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 18:03:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 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 136 [2021-11-13 18:03:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:01,159 INFO L225 Difference]: With dead ends: 290 [2021-11-13 18:03:01,159 INFO L226 Difference]: Without dead ends: 215 [2021-11-13 18:03:01,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1182, Invalid=3930, Unknown=0, NotChecked=0, Total=5112 [2021-11-13 18:03:01,160 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 318 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:01,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 313 Invalid, 566 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [126 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 227.33ms Time] [2021-11-13 18:03:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-13 18:03:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2021-11-13 18:03:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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 18:03:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-11-13 18:03:01,223 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 136 [2021-11-13 18:03:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:01,223 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-11-13 18:03:01,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 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 18:03:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-11-13 18:03:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 18:03:01,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:01,224 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:01,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-13 18:03:01,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-13 18:03:01,425 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash 516169825, now seen corresponding path program 45 times [2021-11-13 18:03:01,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:01,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61221752] [2021-11-13 18:03:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:01,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 1 proven. 1079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:02,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:02,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61221752] [2021-11-13 18:03:02,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61221752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:02,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016798397] [2021-11-13 18:03:02,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:03:02,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:02,332 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:02,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-13 18:03:07,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-13 18:03:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-13 18:03:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:03:08,273 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:03:08,274 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 18:03:08,335 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:03:08,336 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 37 treesize of output 39 [2021-11-13 18:03:08,628 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:03:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:03:09,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:03:09,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:03:09,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-13 18:03:09,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082184266] [2021-11-13 18:03:09,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:09,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:03:09,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:03:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1861, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:03:09,058 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 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 18:03:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:11,695 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2021-11-13 18:03:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-13 18:03:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 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 140 [2021-11-13 18:03:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:11,696 INFO L225 Difference]: With dead ends: 215 [2021-11-13 18:03:11,697 INFO L226 Difference]: Without dead ends: 213 [2021-11-13 18:03:11,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=402, Invalid=7970, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 18:03:11,697 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 130 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1132.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 3672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1350.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:11,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1116 Invalid, 3672 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [152 Valid, 3520 Invalid, 0 Unknown, 0 Unchecked, 1350.87ms Time] [2021-11-13 18:03:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-13 18:03:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 141. [2021-11-13 18:03:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 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 18:03:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-11-13 18:03:11,740 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 140 [2021-11-13 18:03:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:11,740 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-11-13 18:03:11,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 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 18:03:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-11-13 18:03:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 18:03:11,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:11,741 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:11,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:11,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-13 18:03:11,964 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 46 times [2021-11-13 18:03:11,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:11,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031806372] [2021-11-13 18:03:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:11,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:12,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:12,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031806372] [2021-11-13 18:03:12,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031806372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:12,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139057237] [2021-11-13 18:03:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:03:12,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:12,904 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:12,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-13 18:03:12,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:03:12,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-13 18:03:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:13,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:03:14,178 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 25 [2021-11-13 18:03:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:14,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:14,457 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 16 treesize of output 14 [2021-11-13 18:03:14,464 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 32 treesize of output 28 [2021-11-13 18:03:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:14,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139057237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:14,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:14,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 58 [2021-11-13 18:03:14,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49298432] [2021-11-13 18:03:14,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:14,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-13 18:03:14,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-13 18:03:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3119, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:03:14,755 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 58 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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 18:03:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:17,554 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2021-11-13 18:03:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-13 18:03:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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 140 [2021-11-13 18:03:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:17,556 INFO L225 Difference]: With dead ends: 240 [2021-11-13 18:03:17,556 INFO L226 Difference]: Without dead ends: 238 [2021-11-13 18:03:17,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 254 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=523, Invalid=11909, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:03:17,557 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 4374 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1352.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 4566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 4374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1622.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:17,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1490 Invalid, 4566 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [192 Valid, 4374 Invalid, 0 Unknown, 0 Unchecked, 1622.00ms Time] [2021-11-13 18:03:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-13 18:03:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 157. [2021-11-13 18:03:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 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 18:03:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-11-13 18:03:17,617 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 140 [2021-11-13 18:03:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:17,617 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-11-13 18:03:17,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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 18:03:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-11-13 18:03:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:03:17,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:17,618 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:17,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-13 18:03:17,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-13 18:03:17,820 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 47 times [2021-11-13 18:03:17,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:17,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13364664] [2021-11-13 18:03:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:17,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:18,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13364664] [2021-11-13 18:03:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13364664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509000286] [2021-11-13 18:03:18,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:03:18,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:18,349 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:18,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-13 18:03:20,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-13 18:03:20,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:20,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 18:03:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:21,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:21,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509000286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:21,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:21,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2021-11-13 18:03:21,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766840156] [2021-11-13 18:03:21,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:21,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-13 18:03:21,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-13 18:03:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:03:21,358 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 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 18:03:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:21,905 INFO L93 Difference]: Finished difference Result 306 states and 309 transitions. [2021-11-13 18:03:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-13 18:03:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 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 144 [2021-11-13 18:03:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:21,906 INFO L225 Difference]: With dead ends: 306 [2021-11-13 18:03:21,906 INFO L226 Difference]: Without dead ends: 227 [2021-11-13 18:03:21,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:03:21,907 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 461 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:21,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 285 Invalid, 587 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [184 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 240.86ms Time] [2021-11-13 18:03:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-13 18:03:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 157. [2021-11-13 18:03:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2021-11-13 18:03:21,982 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 144 [2021-11-13 18:03:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:21,982 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2021-11-13 18:03:21,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 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 18:03:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2021-11-13 18:03:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 18:03:21,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:21,984 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:22,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:22,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-13 18:03:22,200 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:22,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1109113746, now seen corresponding path program 48 times [2021-11-13 18:03:22,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:22,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74538080] [2021-11-13 18:03:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:22,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 1 proven. 1214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:23,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:23,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74538080] [2021-11-13 18:03:23,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74538080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:23,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144638509] [2021-11-13 18:03:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:03:23,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:23,411 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:23,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-13 18:03:30,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-13 18:03:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-13 18:03:30,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:30,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:03:30,499 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:03:30,500 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 18:03:30,565 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:03:30,565 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 37 treesize of output 39 [2021-11-13 18:03:30,758 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:03:30,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-11-13 18:03:31,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:03:31,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:03:31,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-13 18:03:31,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781121254] [2021-11-13 18:03:31,078 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:31,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:03:31,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:03:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:03:31,079 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 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 18:03:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:33,947 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2021-11-13 18:03:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-13 18:03:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 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 148 [2021-11-13 18:03:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:33,948 INFO L225 Difference]: With dead ends: 227 [2021-11-13 18:03:33,948 INFO L226 Difference]: Without dead ends: 225 [2021-11-13 18:03:33,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=420, Invalid=8700, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:03:33,949 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 147 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1215.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 4037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.24ms SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1467.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:33,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1253 Invalid, 4037 Unknown, 0 Unchecked, 6.24ms Time], IncrementalHoareTripleChecker [167 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 1467.60ms Time] [2021-11-13 18:03:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-13 18:03:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2021-11-13 18:03:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-11-13 18:03:34,004 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 148 [2021-11-13 18:03:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:34,004 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-11-13 18:03:34,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 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 18:03:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-11-13 18:03:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 18:03:34,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:34,005 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:34,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-13 18:03:34,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:34,206 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 49 times [2021-11-13 18:03:34,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:34,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490970189] [2021-11-13 18:03:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:34,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:35,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:35,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490970189] [2021-11-13 18:03:35,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490970189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:35,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161836423] [2021-11-13 18:03:35,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:03:35,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:35,373 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:35,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-13 18:03:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-13 18:03:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:35,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:03:36,774 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 25 [2021-11-13 18:03:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:37,070 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 16 treesize of output 14 [2021-11-13 18:03:37,071 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 32 treesize of output 28 [2021-11-13 18:03:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:37,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161836423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:37,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:37,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 61 [2021-11-13 18:03:37,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489476946] [2021-11-13 18:03:37,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:37,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 18:03:37,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 18:03:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3463, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 18:03:37,365 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 61 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 61 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:40,524 INFO L93 Difference]: Finished difference Result 252 states and 255 transitions. [2021-11-13 18:03:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-13 18:03:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 61 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-13 18:03:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:40,525 INFO L225 Difference]: With dead ends: 252 [2021-11-13 18:03:40,525 INFO L226 Difference]: Without dead ends: 250 [2021-11-13 18:03:40,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 269 SyntacticMatches, 7 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=551, Invalid=13255, Unknown=0, NotChecked=0, Total=13806 [2021-11-13 18:03:40,526 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 5083 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1537.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 5283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.94ms SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 5083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1845.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:40,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1831 Invalid, 5283 Unknown, 0 Unchecked, 7.94ms Time], IncrementalHoareTripleChecker [200 Valid, 5083 Invalid, 0 Unknown, 0 Unchecked, 1845.79ms Time] [2021-11-13 18:03:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-13 18:03:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-11-13 18:03:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 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 18:03:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-11-13 18:03:40,580 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 148 [2021-11-13 18:03:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:40,580 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-11-13 18:03:40,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 61 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-11-13 18:03:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:03:40,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:40,581 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:40,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:40,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-13 18:03:40,782 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1636847677, now seen corresponding path program 50 times [2021-11-13 18:03:40,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:40,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720827885] [2021-11-13 18:03:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:40,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 579 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:41,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:41,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720827885] [2021-11-13 18:03:41,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720827885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:41,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198947509] [2021-11-13 18:03:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:03:41,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:41,344 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:41,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-13 18:03:41,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:03:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:03:41,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:42,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:42,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198947509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:42,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:42,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2021-11-13 18:03:42,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020863095] [2021-11-13 18:03:42,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:42,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 18:03:42,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 18:03:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=2797, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 18:03:42,692 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:43,266 INFO L93 Difference]: Finished difference Result 322 states and 325 transitions. [2021-11-13 18:03:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-13 18:03:43,267 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-13 18:03:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:43,268 INFO L225 Difference]: With dead ends: 322 [2021-11-13 18:03:43,268 INFO L226 Difference]: Without dead ends: 239 [2021-11-13 18:03:43,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1453, Invalid=4867, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:03:43,269 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 364 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 238.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:43,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 321 Invalid, 593 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [126 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 238.16ms Time] [2021-11-13 18:03:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-13 18:03:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2021-11-13 18:03:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2021-11-13 18:03:43,326 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 152 [2021-11-13 18:03:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:43,326 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2021-11-13 18:03:43,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2021-11-13 18:03:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:03:43,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:43,327 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:43,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:43,527 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1552389309, now seen corresponding path program 51 times [2021-11-13 18:03:43,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:43,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575273925] [2021-11-13 18:03:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:43,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 1 proven. 1357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:44,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575273925] [2021-11-13 18:03:44,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575273925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589547959] [2021-11-13 18:03:44,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:03:44,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:44,714 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:44,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-13 18:03:50,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-13 18:03:50,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-13 18:03:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:50,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:03:50,877 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:03:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-13 18:03:50,962 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:03:50,962 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 37 treesize of output 39 [2021-11-13 18:03:51,275 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:03:51,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:03:51,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:03:51,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:03:51,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-11-13 18:03:51,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636924438] [2021-11-13 18:03:51,656 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:51,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:03:51,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:03:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2225, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:03:51,657 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:54,891 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2021-11-13 18:03:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-13 18:03:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-13 18:03:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:54,892 INFO L225 Difference]: With dead ends: 239 [2021-11-13 18:03:54,892 INFO L226 Difference]: Without dead ends: 237 [2021-11-13 18:03:54,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=446, Invalid=9856, Unknown=0, NotChecked=0, Total=10302 [2021-11-13 18:03:54,894 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 106 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 4528 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1381.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 4662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.40ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1653.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:54,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1399 Invalid, 4662 Unknown, 0 Unchecked, 6.40ms Time], IncrementalHoareTripleChecker [134 Valid, 4528 Invalid, 0 Unknown, 0 Unchecked, 1653.41ms Time] [2021-11-13 18:03:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-13 18:03:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 157. [2021-11-13 18:03:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 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 18:03:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-11-13 18:03:54,977 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 156 [2021-11-13 18:03:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:54,978 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-11-13 18:03:54,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:03:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-11-13 18:03:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:03:54,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:54,979 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:55,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:55,192 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash 691296894, now seen corresponding path program 52 times [2021-11-13 18:03:55,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:55,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315000169] [2021-11-13 18:03:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:55,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:56,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:56,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315000169] [2021-11-13 18:03:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315000169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:56,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544841180] [2021-11-13 18:03:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:03:56,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:56,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:56,308 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:56,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-13 18:03:56,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:03:56,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-13 18:03:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:56,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:03:57,828 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 25 [2021-11-13 18:03:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:57,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:58,130 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 16 treesize of output 14 [2021-11-13 18:03:58,132 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 32 treesize of output 28 [2021-11-13 18:03:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544841180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:58,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:03:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 64 [2021-11-13 18:03:58,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240108633] [2021-11-13 18:03:58,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-13 18:03:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-13 18:03:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3825, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:03:58,451 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:04:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:01,845 INFO L93 Difference]: Finished difference Result 264 states and 267 transitions. [2021-11-13 18:04:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 18:04:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-13 18:04:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:01,846 INFO L225 Difference]: With dead ends: 264 [2021-11-13 18:04:01,846 INFO L226 Difference]: Without dead ends: 262 [2021-11-13 18:04:01,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 284 SyntacticMatches, 7 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3447 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=579, Invalid=14673, Unknown=0, NotChecked=0, Total=15252 [2021-11-13 18:04:01,847 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 223 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 5304 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1634.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 5557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.00ms SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 5304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1960.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:01,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1776 Invalid, 5557 Unknown, 0 Unchecked, 8.00ms Time], IncrementalHoareTripleChecker [253 Valid, 5304 Invalid, 0 Unknown, 0 Unchecked, 1960.72ms Time] [2021-11-13 18:04:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-13 18:04:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 173. [2021-11-13 18:04:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 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 18:04:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2021-11-13 18:04:01,917 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 156 [2021-11-13 18:04:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:01,917 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2021-11-13 18:04:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:04:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2021-11-13 18:04:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 18:04:01,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:01,919 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:01,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-13 18:04:02,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:02,132 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:02,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1934297460, now seen corresponding path program 53 times [2021-11-13 18:04:02,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:02,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199532857] [2021-11-13 18:04:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:02,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:02,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:02,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199532857] [2021-11-13 18:04:02,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199532857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:02,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826355936] [2021-11-13 18:04:02,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:04:02,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:02,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:02,768 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:02,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-13 18:04:04,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-13 18:04:04,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 18:04:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:05,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826355936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:05,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:04:05,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2021-11-13 18:04:05,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110937327] [2021-11-13 18:04:05,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:05,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-13 18:04:05,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-13 18:04:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=3084, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:04:05,987 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 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 18:04:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:06,622 INFO L93 Difference]: Finished difference Result 338 states and 341 transitions. [2021-11-13 18:04:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-13 18:04:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 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 160 [2021-11-13 18:04:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:06,624 INFO L225 Difference]: With dead ends: 338 [2021-11-13 18:04:06,624 INFO L226 Difference]: Without dead ends: 251 [2021-11-13 18:04:06,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1599, Invalid=5373, Unknown=0, NotChecked=0, Total=6972 [2021-11-13 18:04:06,625 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 455 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:06,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 278 Invalid, 584 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [179 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 257.85ms Time] [2021-11-13 18:04:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-13 18:04:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 173. [2021-11-13 18:04:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 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 18:04:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-11-13 18:04:06,699 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 160 [2021-11-13 18:04:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:06,699 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-11-13 18:04:06,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 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 18:04:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-11-13 18:04:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:04:06,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:06,700 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:06,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-13 18:04:06,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-13 18:04:06,916 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1582755700, now seen corresponding path program 54 times [2021-11-13 18:04:06,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:06,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527360646] [2021-11-13 18:04:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:06,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 1 proven. 1508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:08,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:08,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527360646] [2021-11-13 18:04:08,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527360646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:08,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465346155] [2021-11-13 18:04:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:04:08,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:08,274 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:08,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-13 18:04:19,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-11-13 18:04:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-13 18:04:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:04:19,534 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:04:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:04:19,599 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:04:19,600 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 40 treesize of output 42 [2021-11-13 18:04:19,726 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:04:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 66 [2021-11-13 18:04:19,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:04:19,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:04:19,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-11-13 18:04:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547722872] [2021-11-13 18:04:19,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 18:04:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 18:04:19,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:04:19,980 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 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 18:04:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:23,553 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2021-11-13 18:04:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-13 18:04:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-13 18:04:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:23,555 INFO L225 Difference]: With dead ends: 251 [2021-11-13 18:04:23,555 INFO L226 Difference]: Without dead ends: 249 [2021-11-13 18:04:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=454, Invalid=10466, Unknown=0, NotChecked=0, Total=10920 [2021-11-13 18:04:23,557 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 111 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1541.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 5193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.11ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 5052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1852.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:23,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1591 Invalid, 5193 Unknown, 0 Unchecked, 7.11ms Time], IncrementalHoareTripleChecker [141 Valid, 5052 Invalid, 0 Unknown, 0 Unchecked, 1852.93ms Time] [2021-11-13 18:04:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-13 18:04:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 165. [2021-11-13 18:04:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:04:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-11-13 18:04:23,657 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 164 [2021-11-13 18:04:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:23,657 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-11-13 18:04:23,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 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 18:04:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-11-13 18:04:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:04:23,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:23,659 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:23,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:23,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-13 18:04:23,876 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 55 times [2021-11-13 18:04:23,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:23,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942326065] [2021-11-13 18:04:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:23,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:25,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:25,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942326065] [2021-11-13 18:04:25,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942326065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:25,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473501124] [2021-11-13 18:04:25,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:04:25,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:25,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:25,160 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-13 18:04:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-13 18:04:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:04:26,780 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 25 [2021-11-13 18:04:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:26,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:27,096 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 16 treesize of output 14 [2021-11-13 18:04:27,098 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 32 treesize of output 28 [2021-11-13 18:04:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473501124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:27,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:04:27,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 67 [2021-11-13 18:04:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805571273] [2021-11-13 18:04:27,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:27,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-13 18:04:27,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-13 18:04:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=4205, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:04:27,421 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 67 states, 67 states have (on average 3.791044776119403) internal successors, (254), 67 states have internal predecessors, (254), 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 18:04:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:31,571 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2021-11-13 18:04:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-13 18:04:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.791044776119403) internal successors, (254), 67 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-13 18:04:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:31,573 INFO L225 Difference]: With dead ends: 276 [2021-11-13 18:04:31,573 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 18:04:31,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 299 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3787 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=607, Invalid=16163, Unknown=0, NotChecked=0, Total=16770 [2021-11-13 18:04:31,574 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 178 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 7110 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2140.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 7331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.89ms SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 7110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2576.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:31,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2348 Invalid, 7331 Unknown, 0 Unchecked, 9.89ms Time], IncrementalHoareTripleChecker [221 Valid, 7110 Invalid, 0 Unknown, 0 Unchecked, 2576.14ms Time] [2021-11-13 18:04:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 18:04:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 181. [2021-11-13 18:04:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 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 18:04:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2021-11-13 18:04:31,673 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 164 [2021-11-13 18:04:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:31,673 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2021-11-13 18:04:31,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.791044776119403) internal successors, (254), 67 states have internal predecessors, (254), 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 18:04:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2021-11-13 18:04:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 18:04:31,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:31,674 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:31,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:31,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-13 18:04:31,875 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash 615561125, now seen corresponding path program 56 times [2021-11-13 18:04:31,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:31,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311100291] [2021-11-13 18:04:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:31,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 723 proven. 857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:32,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:32,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311100291] [2021-11-13 18:04:32,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311100291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:32,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107580670] [2021-11-13 18:04:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:04:32,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:32,497 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:32,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-13 18:04:32,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:04:32,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:04:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 800 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:33,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 800 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:34,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107580670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:34,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:04:34,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2021-11-13 18:04:34,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574170686] [2021-11-13 18:04:34,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:34,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-13 18:04:34,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-13 18:04:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=3385, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:04:34,178 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 67 states, 67 states have (on average 3.8805970149253732) internal successors, (260), 67 states have internal predecessors, (260), 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 18:04:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:34,849 INFO L93 Difference]: Finished difference Result 354 states and 357 transitions. [2021-11-13 18:04:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 18:04:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.8805970149253732) internal successors, (260), 67 states have internal predecessors, (260), 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 168 [2021-11-13 18:04:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:34,853 INFO L225 Difference]: With dead ends: 354 [2021-11-13 18:04:34,853 INFO L226 Difference]: Without dead ends: 263 [2021-11-13 18:04:34,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1752, Invalid=5904, Unknown=0, NotChecked=0, Total=7656 [2021-11-13 18:04:34,855 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 408 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 269.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:34,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 401 Invalid, 684 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [132 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 269.30ms Time] [2021-11-13 18:04:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-13 18:04:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 181. [2021-11-13 18:04:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 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 18:04:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2021-11-13 18:04:34,932 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 168 [2021-11-13 18:04:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:34,933 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2021-11-13 18:04:34,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.8805970149253732) internal successors, (260), 67 states have internal predecessors, (260), 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 18:04:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2021-11-13 18:04:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 18:04:34,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:34,934 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:34,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:35,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:35,148 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1227618267, now seen corresponding path program 57 times [2021-11-13 18:04:35,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:35,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433314945] [2021-11-13 18:04:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:35,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 1 proven. 1667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:36,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:36,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433314945] [2021-11-13 18:04:36,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433314945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:36,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518306346] [2021-11-13 18:04:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:04:36,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:36,601 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:36,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-13 18:04:42,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-13 18:04:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-13 18:04:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:43,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:04:43,320 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:04:43,321 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 18:04:43,408 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:04:43,408 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 37 treesize of output 39 [2021-11-13 18:04:43,695 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:04:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:04:44,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:04:44,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:04:44,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-11-13 18:04:44,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110703735] [2021-11-13 18:04:44,081 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:44,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 18:04:44,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 18:04:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2621, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:04:44,083 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 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 18:04:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:48,043 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2021-11-13 18:04:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-13 18:04:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 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 172 [2021-11-13 18:04:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:48,045 INFO L225 Difference]: With dead ends: 263 [2021-11-13 18:04:48,045 INFO L226 Difference]: Without dead ends: 261 [2021-11-13 18:04:48,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=490, Invalid=11942, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:04:48,047 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 155 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 5560 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1721.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 5746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.98ms SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 5560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2069.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:48,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1754 Invalid, 5746 Unknown, 0 Unchecked, 7.98ms Time], IncrementalHoareTripleChecker [186 Valid, 5560 Invalid, 0 Unknown, 0 Unchecked, 2069.48ms Time] [2021-11-13 18:04:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-13 18:04:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 173. [2021-11-13 18:04:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 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 18:04:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-11-13 18:04:48,165 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 172 [2021-11-13 18:04:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:48,165 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-11-13 18:04:48,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 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 18:04:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-11-13 18:04:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 18:04:48,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:48,167 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:48,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-13 18:04:48,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:48,367 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1626770528, now seen corresponding path program 58 times [2021-11-13 18:04:48,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:48,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797029154] [2021-11-13 18:04:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:48,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:49,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:49,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797029154] [2021-11-13 18:04:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797029154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:49,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862419315] [2021-11-13 18:04:49,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:04:49,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:49,590 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:49,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-13 18:04:49,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:04:49,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-13 18:04:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:50,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:04:51,404 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 25 [2021-11-13 18:04:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:51,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-13 18:04:51,737 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 32 treesize of output 28 [2021-11-13 18:04:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:52,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862419315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:52,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:04:52,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 70 [2021-11-13 18:04:52,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039941121] [2021-11-13 18:04:52,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:52,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-13 18:04:52,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-13 18:04:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4603, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:04:52,078 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 70 states, 70 states have (on average 3.8) internal successors, (266), 70 states have internal predecessors, (266), 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 18:04:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:56,177 INFO L93 Difference]: Finished difference Result 288 states and 291 transitions. [2021-11-13 18:04:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-13 18:04:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.8) internal successors, (266), 70 states have internal predecessors, (266), 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 172 [2021-11-13 18:04:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:56,179 INFO L225 Difference]: With dead ends: 288 [2021-11-13 18:04:56,179 INFO L226 Difference]: Without dead ends: 286 [2021-11-13 18:04:56,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 314 SyntacticMatches, 7 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4143 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=635, Invalid=17725, Unknown=0, NotChecked=0, Total=18360 [2021-11-13 18:04:56,180 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 190 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 6611 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1994.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 6845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.32ms SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 6611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2399.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:56,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 2261 Invalid, 6845 Unknown, 0 Unchecked, 9.32ms Time], IncrementalHoareTripleChecker [234 Valid, 6611 Invalid, 0 Unknown, 0 Unchecked, 2399.62ms Time] [2021-11-13 18:04:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-13 18:04:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 189. [2021-11-13 18:04:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 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 18:04:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2021-11-13 18:04:56,292 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 172 [2021-11-13 18:04:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:56,293 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2021-11-13 18:04:56,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.8) internal successors, (266), 70 states have internal predecessors, (266), 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 18:04:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2021-11-13 18:04:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:04:56,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:56,294 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:56,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:56,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:56,496 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1191347626, now seen corresponding path program 59 times [2021-11-13 18:04:56,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:56,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162350823] [2021-11-13 18:04:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:56,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 801 proven. 942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:57,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:57,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162350823] [2021-11-13 18:04:57,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162350823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:57,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707935715] [2021-11-13 18:04:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:04:57,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:57,133 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-13 18:05:00,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-13 18:05:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:05:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 882 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:02,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 882 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707935715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:02,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:05:02,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2021-11-13 18:05:02,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177717070] [2021-11-13 18:05:02,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:02,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-13 18:05:02,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-13 18:05:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=3700, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:05:02,490 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 70 states, 70 states have (on average 3.8857142857142857) internal successors, (272), 70 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:03,222 INFO L93 Difference]: Finished difference Result 370 states and 373 transitions. [2021-11-13 18:05:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-13 18:05:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.8857142857142857) internal successors, (272), 70 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-13 18:05:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:03,224 INFO L225 Difference]: With dead ends: 370 [2021-11-13 18:05:03,224 INFO L226 Difference]: Without dead ends: 275 [2021-11-13 18:05:03,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1912, Invalid=6460, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 18:05:03,225 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 439 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 275.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:03,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 387 Invalid, 677 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [143 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 275.51ms Time] [2021-11-13 18:05:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-13 18:05:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-11-13 18:05:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2021-11-13 18:05:03,344 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 176 [2021-11-13 18:05:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:03,344 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2021-11-13 18:05:03,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.8857142857142857) internal successors, (272), 70 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2021-11-13 18:05:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-13 18:05:03,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:03,346 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:03,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:03,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-13 18:05:03,560 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash -911444650, now seen corresponding path program 60 times [2021-11-13 18:05:03,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:03,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269017775] [2021-11-13 18:05:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:03,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 1 proven. 1834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:05,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:05,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269017775] [2021-11-13 18:05:05,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269017775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:05,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121544759] [2021-11-13 18:05:05,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:05:05,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:05,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:05,211 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:05,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-13 18:05:14,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-13 18:05:14,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-13 18:05:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:15,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:05:15,234 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 18:05:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 18:05:15,342 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-13 18:05:15,342 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 42 treesize of output 44 [2021-11-13 18:05:15,561 INFO L354 Elim1Store]: treesize reduction 152, result has 26.9 percent of original size [2021-11-13 18:05:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 87 [2021-11-13 18:05:15,765 INFO L354 Elim1Store]: treesize reduction 248, result has 19.0 percent of original size [2021-11-13 18:05:15,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 111 [2021-11-13 18:05:18,498 INFO L354 Elim1Store]: treesize reduction 281, result has 33.1 percent of original size [2021-11-13 18:05:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 127 treesize of output 218 [2021-11-13 18:05:22,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:05:22,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:22,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-11-13 18:05:22,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645084157] [2021-11-13 18:05:22,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:22,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:05:22,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:05:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=5716, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:05:22,872 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 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 18:05:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:27,900 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2021-11-13 18:05:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-13 18:05:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 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 180 [2021-11-13 18:05:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:27,902 INFO L225 Difference]: With dead ends: 275 [2021-11-13 18:05:27,902 INFO L226 Difference]: Without dead ends: 273 [2021-11-13 18:05:27,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1586, Invalid=18436, Unknown=0, NotChecked=0, Total=20022 [2021-11-13 18:05:27,903 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 127 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 6086 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1903.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.74ms SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 6086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2273.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:27,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1925 Invalid, 6244 Unknown, 0 Unchecked, 8.74ms Time], IncrementalHoareTripleChecker [158 Valid, 6086 Invalid, 0 Unknown, 0 Unchecked, 2273.21ms Time] [2021-11-13 18:05:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-13 18:05:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 181. [2021-11-13 18:05:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 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 18:05:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-11-13 18:05:27,990 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 180 [2021-11-13 18:05:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:27,991 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-11-13 18:05:27,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 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 18:05:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-11-13 18:05:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-13 18:05:27,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:27,992 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:28,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:28,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:28,192 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash -634625007, now seen corresponding path program 61 times [2021-11-13 18:05:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843817570] [2021-11-13 18:05:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:28,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:29,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:29,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843817570] [2021-11-13 18:05:29,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843817570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:29,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241387026] [2021-11-13 18:05:29,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:05:29,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:29,569 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:29,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-13 18:05:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:29,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-13 18:05:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:30,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:05:31,467 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 25 [2021-11-13 18:05:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:31,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:31,877 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 16 treesize of output 14 [2021-11-13 18:05:31,879 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 32 treesize of output 28 [2021-11-13 18:05:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:32,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241387026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:32,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:05:32,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 73 [2021-11-13 18:05:32,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371295100] [2021-11-13 18:05:32,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 18:05:32,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:32,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 18:05:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=5019, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:05:32,326 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 73 states, 73 states have (on average 3.808219178082192) internal successors, (278), 73 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:37,070 INFO L93 Difference]: Finished difference Result 300 states and 303 transitions. [2021-11-13 18:05:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-13 18:05:37,070 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.808219178082192) internal successors, (278), 73 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-13 18:05:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:37,071 INFO L225 Difference]: With dead ends: 300 [2021-11-13 18:05:37,071 INFO L226 Difference]: Without dead ends: 298 [2021-11-13 18:05:37,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 329 SyntacticMatches, 7 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=663, Invalid=19359, Unknown=0, NotChecked=0, Total=20022 [2021-11-13 18:05:37,072 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 251 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 7522 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2366.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 7813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.45ms SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 7522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2831.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:37,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 2668 Invalid, 7813 Unknown, 0 Unchecked, 12.45ms Time], IncrementalHoareTripleChecker [291 Valid, 7522 Invalid, 0 Unknown, 0 Unchecked, 2831.72ms Time] [2021-11-13 18:05:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-13 18:05:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 197. [2021-11-13 18:05:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2021-11-13 18:05:37,167 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 180 [2021-11-13 18:05:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:37,167 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2021-11-13 18:05:37,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.808219178082192) internal successors, (278), 73 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2021-11-13 18:05:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 18:05:37,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:37,168 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:37,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-13 18:05:37,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:37,368 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1865290119, now seen corresponding path program 62 times [2021-11-13 18:05:37,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:37,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783021763] [2021-11-13 18:05:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:37,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 883 proven. 1031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:38,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:38,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783021763] [2021-11-13 18:05:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783021763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:38,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172016648] [2021-11-13 18:05:38,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:05:38,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:38,051 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:38,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-13 18:05:38,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:05:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-13 18:05:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 968 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:39,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 968 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172016648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:39,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:05:39,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 73 [2021-11-13 18:05:39,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865355844] [2021-11-13 18:05:39,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:39,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 18:05:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 18:05:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=4029, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:05:39,973 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 73 states, 73 states have (on average 3.8904109589041096) internal successors, (284), 73 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:40,794 INFO L93 Difference]: Finished difference Result 386 states and 389 transitions. [2021-11-13 18:05:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-13 18:05:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.8904109589041096) internal successors, (284), 73 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 18:05:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:40,796 INFO L225 Difference]: With dead ends: 386 [2021-11-13 18:05:40,796 INFO L226 Difference]: Without dead ends: 287 [2021-11-13 18:05:40,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2079, Invalid=7041, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:05:40,797 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 446 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:40,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 392 Invalid, 727 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [169 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 300.54ms Time] [2021-11-13 18:05:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-13 18:05:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 197. [2021-11-13 18:05:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 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 18:05:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2021-11-13 18:05:40,894 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 184 [2021-11-13 18:05:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:40,894 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2021-11-13 18:05:40,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.8904109589041096) internal successors, (284), 73 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:05:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2021-11-13 18:05:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 18:05:40,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:40,895 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:40,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-13 18:05:41,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-13 18:05:41,100 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1010628359, now seen corresponding path program 63 times [2021-11-13 18:05:41,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:41,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970468163] [2021-11-13 18:05:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:41,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 1 proven. 2009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:42,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:42,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970468163] [2021-11-13 18:05:42,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970468163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:42,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198770712] [2021-11-13 18:05:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:05:42,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:42,518 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:42,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-13 18:05:57,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-13 18:05:57,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:57,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-13 18:05:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:57,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:05:57,891 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:05:57,892 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 18:05:57,987 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:05:57,987 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 37 treesize of output 39 [2021-11-13 18:05:58,365 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:05:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:05:58,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:05:58,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:58,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-11-13 18:05:58,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84938166] [2021-11-13 18:05:58,846 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:58,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 18:05:58,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 18:05:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3049, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 18:05:58,847 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:06:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:03,558 INFO L93 Difference]: Finished difference Result 287 states and 289 transitions. [2021-11-13 18:06:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-13 18:06:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-13 18:06:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:03,559 INFO L225 Difference]: With dead ends: 287 [2021-11-13 18:06:03,559 INFO L226 Difference]: Without dead ends: 285 [2021-11-13 18:06:03,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=534, Invalid=14228, Unknown=0, NotChecked=0, Total=14762 [2021-11-13 18:06:03,560 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 6518 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2033.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 6683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.17ms SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 6518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2428.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:03,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 2059 Invalid, 6683 Unknown, 0 Unchecked, 9.17ms Time], IncrementalHoareTripleChecker [165 Valid, 6518 Invalid, 0 Unknown, 0 Unchecked, 2428.60ms Time] [2021-11-13 18:06:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-13 18:06:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 189. [2021-11-13 18:06:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 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 18:06:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-11-13 18:06:03,681 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 188 [2021-11-13 18:06:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:03,682 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-11-13 18:06:03,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:06:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-11-13 18:06:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 18:06:03,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:03,685 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:03,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:03,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-13 18:06:03,897 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 425791554, now seen corresponding path program 64 times [2021-11-13 18:06:03,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:03,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139750365] [2021-11-13 18:06:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:03,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:05,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:05,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139750365] [2021-11-13 18:06:05,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139750365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:05,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033074741] [2021-11-13 18:06:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:06:05,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:05,696 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:05,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-13 18:06:05,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:06:05,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-13 18:06:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:06,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:06:07,747 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 25 [2021-11-13 18:06:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:07,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:08,162 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 16 treesize of output 14 [2021-11-13 18:06:08,164 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 32 treesize of output 28 [2021-11-13 18:06:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:08,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033074741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:08,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:06:08,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 76 [2021-11-13 18:06:08,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978588688] [2021-11-13 18:06:08,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:08,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-13 18:06:08,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-13 18:06:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=5453, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:06:08,544 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 76 states, 76 states have (on average 3.8157894736842106) internal successors, (290), 76 states have internal predecessors, (290), 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 18:06:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:13,494 INFO L93 Difference]: Finished difference Result 312 states and 315 transitions. [2021-11-13 18:06:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-13 18:06:13,494 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8157894736842106) internal successors, (290), 76 states have internal predecessors, (290), 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 188 [2021-11-13 18:06:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:13,495 INFO L225 Difference]: With dead ends: 312 [2021-11-13 18:06:13,495 INFO L226 Difference]: Without dead ends: 310 [2021-11-13 18:06:13,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 344 SyntacticMatches, 7 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=691, Invalid=21065, Unknown=0, NotChecked=0, Total=21756 [2021-11-13 18:06:13,496 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 202 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 8032 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2423.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 8286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.01ms SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 8032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2909.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:13,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 2711 Invalid, 8286 Unknown, 0 Unchecked, 11.01ms Time], IncrementalHoareTripleChecker [254 Valid, 8032 Invalid, 0 Unknown, 0 Unchecked, 2909.12ms Time] [2021-11-13 18:06:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-13 18:06:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 205. [2021-11-13 18:06:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 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 18:06:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-11-13 18:06:13,612 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 188 [2021-11-13 18:06:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:13,612 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-11-13 18:06:13,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8157894736842106) internal successors, (290), 76 states have internal predecessors, (290), 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 18:06:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-11-13 18:06:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:06:13,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:13,614 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:13,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:13,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-13 18:06:13,828 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1860123960, now seen corresponding path program 65 times [2021-11-13 18:06:13,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:13,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069300183] [2021-11-13 18:06:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:13,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 969 proven. 1124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:14,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:14,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069300183] [2021-11-13 18:06:14,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069300183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:14,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780079343] [2021-11-13 18:06:14,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:06:14,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:14,535 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:14,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-13 18:06:21,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-13 18:06:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 18:06:21,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1058 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:22,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1058 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:23,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780079343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:23,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:06:23,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2021-11-13 18:06:23,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839586595] [2021-11-13 18:06:23,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:23,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-13 18:06:23,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-13 18:06:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=4372, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:06:23,347 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 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 18:06:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:24,178 INFO L93 Difference]: Finished difference Result 402 states and 405 transitions. [2021-11-13 18:06:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 18:06:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 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 192 [2021-11-13 18:06:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:24,180 INFO L225 Difference]: With dead ends: 402 [2021-11-13 18:06:24,180 INFO L226 Difference]: Without dead ends: 299 [2021-11-13 18:06:24,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2253, Invalid=7647, Unknown=0, NotChecked=0, Total=9900 [2021-11-13 18:06:24,181 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 517 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:24,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 408 Invalid, 773 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [215 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 301.74ms Time] [2021-11-13 18:06:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-13 18:06:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 205. [2021-11-13 18:06:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 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 18:06:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-11-13 18:06:24,283 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 192 [2021-11-13 18:06:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:24,283 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-11-13 18:06:24,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 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 18:06:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-11-13 18:06:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-13 18:06:24,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:24,285 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:24,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-13 18:06:24,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:24,485 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash -327004872, now seen corresponding path program 66 times [2021-11-13 18:06:24,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:24,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288686334] [2021-11-13 18:06:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:24,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 1 proven. 2192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:25,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:25,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288686334] [2021-11-13 18:06:25,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288686334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:25,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178081185] [2021-11-13 18:06:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:06:25,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:25,876 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:25,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-13 18:06:34,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-11-13 18:06:34,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:34,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-13 18:06:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:35,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:06:35,392 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:06:35,393 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 18:06:35,466 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:06:35,467 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 37 treesize of output 39 [2021-11-13 18:06:35,757 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:06:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 76 [2021-11-13 18:06:36,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:06:36,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:06:36,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-11-13 18:06:36,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486746235] [2021-11-13 18:06:36,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:36,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 18:06:36,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 18:06:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3275, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:06:36,132 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 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 18:06:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:41,138 INFO L93 Difference]: Finished difference Result 299 states and 301 transitions. [2021-11-13 18:06:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-13 18:06:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 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 196 [2021-11-13 18:06:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:41,139 INFO L225 Difference]: With dead ends: 299 [2021-11-13 18:06:41,139 INFO L226 Difference]: Without dead ends: 297 [2021-11-13 18:06:41,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=556, Invalid=15446, Unknown=0, NotChecked=0, Total=16002 [2021-11-13 18:06:41,140 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 189 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 6947 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2140.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 7168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.87ms SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 6947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2569.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:41,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 2290 Invalid, 7168 Unknown, 0 Unchecked, 8.87ms Time], IncrementalHoareTripleChecker [221 Valid, 6947 Invalid, 0 Unknown, 0 Unchecked, 2569.26ms Time] [2021-11-13 18:06:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-13 18:06:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 197. [2021-11-13 18:06:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 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 18:06:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-13 18:06:41,238 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 196 [2021-11-13 18:06:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:41,238 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-13 18:06:41,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 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 18:06:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-13 18:06:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-13 18:06:41,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:41,239 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:41,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:41,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:41,439 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -80654093, now seen corresponding path program 67 times [2021-11-13 18:06:41,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:41,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194798366] [2021-11-13 18:06:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:41,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:42,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:42,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194798366] [2021-11-13 18:06:42,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194798366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:42,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656253303] [2021-11-13 18:06:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:06:42,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:42,880 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:42,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-13 18:06:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-13 18:06:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:43,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:06:44,995 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 25 [2021-11-13 18:06:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:45,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:45,370 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 16 treesize of output 14 [2021-11-13 18:06:45,371 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 32 treesize of output 28 [2021-11-13 18:06:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:45,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656253303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:45,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:06:45,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 79 [2021-11-13 18:06:45,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536577448] [2021-11-13 18:06:45,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:45,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-13 18:06:45,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-13 18:06:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=5905, Unknown=0, NotChecked=0, Total=6162 [2021-11-13 18:06:45,777 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 79 states, 79 states have (on average 3.8227848101265822) internal successors, (302), 79 states have internal predecessors, (302), 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 18:06:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:51,272 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2021-11-13 18:06:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-13 18:06:51,273 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.8227848101265822) internal successors, (302), 79 states have internal predecessors, (302), 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 196 [2021-11-13 18:06:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:51,274 INFO L225 Difference]: With dead ends: 324 [2021-11-13 18:06:51,274 INFO L226 Difference]: Without dead ends: 322 [2021-11-13 18:06:51,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 359 SyntacticMatches, 7 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5307 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=719, Invalid=22843, Unknown=0, NotChecked=0, Total=23562 [2021-11-13 18:06:51,275 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 216 mSDsluCounter, 3023 mSDsCounter, 0 mSdLazyCounter, 9243 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2757.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 9511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.57ms SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 9243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3307.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:51,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 3081 Invalid, 9511 Unknown, 0 Unchecked, 11.57ms Time], IncrementalHoareTripleChecker [268 Valid, 9243 Invalid, 0 Unknown, 0 Unchecked, 3307.28ms Time] [2021-11-13 18:06:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-13 18:06:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 213. [2021-11-13 18:06:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 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 18:06:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2021-11-13 18:06:51,381 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 196 [2021-11-13 18:06:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:51,382 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2021-11-13 18:06:51,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.8227848101265822) internal successors, (302), 79 states have internal predecessors, (302), 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 18:06:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2021-11-13 18:06:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:06:51,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:51,383 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:51,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-13 18:06:51,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:51,583 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2018360681, now seen corresponding path program 68 times [2021-11-13 18:06:51,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:51,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009123737] [2021-11-13 18:06:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:51,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1059 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:52,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:52,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009123737] [2021-11-13 18:06:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009123737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:52,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145577815] [2021-11-13 18:06:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:06:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:52,437 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:52,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-13 18:06:52,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:06:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 18:06:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1152 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:53,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1152 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:54,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145577815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:54,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:06:54,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2021-11-13 18:06:54,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968212211] [2021-11-13 18:06:54,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:54,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-13 18:06:54,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-13 18:06:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=4729, Unknown=0, NotChecked=0, Total=6162 [2021-11-13 18:06:54,313 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 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 18:06:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:55,214 INFO L93 Difference]: Finished difference Result 418 states and 421 transitions. [2021-11-13 18:06:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-13 18:06:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-13 18:06:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:55,215 INFO L225 Difference]: With dead ends: 418 [2021-11-13 18:06:55,215 INFO L226 Difference]: Without dead ends: 311 [2021-11-13 18:06:55,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2434, Invalid=8278, Unknown=0, NotChecked=0, Total=10712 [2021-11-13 18:06:55,216 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 570 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:55,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 449 Invalid, 800 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [184 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 314.71ms Time] [2021-11-13 18:06:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-13 18:06:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 213. [2021-11-13 18:06:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:06:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2021-11-13 18:06:55,327 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 200 [2021-11-13 18:06:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:55,327 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2021-11-13 18:06:55,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 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 18:06:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2021-11-13 18:06:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 18:06:55,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:55,329 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:55,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-13 18:06:55,544 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1592182807, now seen corresponding path program 69 times [2021-11-13 18:06:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:55,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173938412] [2021-11-13 18:06:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 1 proven. 2383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:57,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:57,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173938412] [2021-11-13 18:06:57,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173938412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:57,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239089839] [2021-11-13 18:06:57,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:06:57,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:57,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:57,345 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:57,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-13 18:07:22,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-13 18:07:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-13 18:07:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:23,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:07:23,336 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 18:07:23,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 18:07:23,427 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-13 18:07:23,427 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 42 treesize of output 44 [2021-11-13 18:07:23,638 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-11-13 18:07:23,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-13 18:07:23,782 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-13 18:07:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 69 treesize of output 66 [2021-11-13 18:07:24,033 INFO L354 Elim1Store]: treesize reduction 266, result has 15.3 percent of original size [2021-11-13 18:07:24,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 80 [2021-11-13 18:07:24,192 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-13 18:07:24,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 83 treesize of output 83 [2021-11-13 18:07:24,686 INFO L354 Elim1Store]: treesize reduction 358, result has 16.4 percent of original size [2021-11-13 18:07:24,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 115 [2021-11-13 18:07:25,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:07:25,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:07:25,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2021-11-13 18:07:25,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258816798] [2021-11-13 18:07:25,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:25,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 18:07:25,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 18:07:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-11-13 18:07:25,345 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 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 18:07:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:31,639 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2021-11-13 18:07:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-13 18:07:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 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 204 [2021-11-13 18:07:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:31,641 INFO L225 Difference]: With dead ends: 311 [2021-11-13 18:07:31,641 INFO L226 Difference]: Without dead ends: 309 [2021-11-13 18:07:31,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3845 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1869, Invalid=23891, Unknown=0, NotChecked=0, Total=25760 [2021-11-13 18:07:31,642 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 196 mSDsluCounter, 2480 mSDsCounter, 0 mSdLazyCounter, 7595 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2440.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 7825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.47ms SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 7595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2913.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:31,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2535 Invalid, 7825 Unknown, 0 Unchecked, 11.47ms Time], IncrementalHoareTripleChecker [230 Valid, 7595 Invalid, 0 Unknown, 0 Unchecked, 2913.24ms Time] [2021-11-13 18:07:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-13 18:07:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 205. [2021-11-13 18:07:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 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 18:07:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-11-13 18:07:31,779 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 204 [2021-11-13 18:07:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:31,780 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-11-13 18:07:31,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 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 18:07:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-11-13 18:07:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 18:07:31,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:31,781 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:31,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:31,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:31,996 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:07:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash -187046364, now seen corresponding path program 70 times [2021-11-13 18:07:31,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:31,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17645623] [2021-11-13 18:07:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:31,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:33,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:33,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17645623] [2021-11-13 18:07:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17645623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:07:33,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731267965] [2021-11-13 18:07:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:07:33,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:33,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:07:33,757 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:07:33,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-13 18:07:33,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:07:33,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:33,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-13 18:07:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:07:36,037 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 25 [2021-11-13 18:07:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:36,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:36,434 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 16 treesize of output 14 [2021-11-13 18:07:36,435 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 32 treesize of output 28 [2021-11-13 18:07:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:36,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731267965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:36,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:07:36,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 82 [2021-11-13 18:07:36,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892822460] [2021-11-13 18:07:36,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:36,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-13 18:07:36,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-13 18:07:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=6375, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:07:36,868 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 82 states, 82 states have (on average 3.8292682926829267) internal successors, (314), 82 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:07:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:42,890 INFO L93 Difference]: Finished difference Result 336 states and 339 transitions. [2021-11-13 18:07:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-13 18:07:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.8292682926829267) internal successors, (314), 82 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-13 18:07:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:42,892 INFO L225 Difference]: With dead ends: 336 [2021-11-13 18:07:42,892 INFO L226 Difference]: Without dead ends: 334 [2021-11-13 18:07:42,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 374 SyntacticMatches, 7 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5727 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=747, Invalid=24693, Unknown=0, NotChecked=0, Total=25440 [2021-11-13 18:07:42,893 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 279 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 9921 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3023.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 3399 SdHoareTripleChecker+Invalid, 10250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.40ms SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 9921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3623.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 3399 Invalid, 10250 Unknown, 0 Unchecked, 14.40ms Time], IncrementalHoareTripleChecker [329 Valid, 9921 Invalid, 0 Unknown, 0 Unchecked, 3623.89ms Time] [2021-11-13 18:07:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-13 18:07:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 221. [2021-11-13 18:07:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 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 18:07:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2021-11-13 18:07:43,018 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 204 [2021-11-13 18:07:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:43,018 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2021-11-13 18:07:43,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.8292682926829267) internal successors, (314), 82 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:07:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2021-11-13 18:07:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:07:43,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:43,020 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:43,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-13 18:07:43,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:43,220 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:07:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1806282214, now seen corresponding path program 71 times [2021-11-13 18:07:43,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:43,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139662803] [2021-11-13 18:07:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:43,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1153 proven. 1322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:44,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:44,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139662803] [2021-11-13 18:07:44,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139662803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:07:44,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920268685] [2021-11-13 18:07:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:07:44,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:07:44,095 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:07:44,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-13 18:07:51,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-13 18:07:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 18:07:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1250 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:53,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1250 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:53,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920268685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:53,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:07:53,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2021-11-13 18:07:53,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146957488] [2021-11-13 18:07:53,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:53,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-13 18:07:53,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-13 18:07:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=5100, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:07:53,522 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:07:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:54,540 INFO L93 Difference]: Finished difference Result 434 states and 437 transitions. [2021-11-13 18:07:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-13 18:07:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-13 18:07:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:54,542 INFO L225 Difference]: With dead ends: 434 [2021-11-13 18:07:54,542 INFO L226 Difference]: Without dead ends: 323 [2021-11-13 18:07:54,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2622, Invalid=8934, Unknown=0, NotChecked=0, Total=11556 [2021-11-13 18:07:54,543 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 557 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 338.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:54,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 457 Invalid, 813 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [184 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 338.72ms Time] [2021-11-13 18:07:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-13 18:07:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 221. [2021-11-13 18:07:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 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 18:07:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2021-11-13 18:07:54,676 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 208 [2021-11-13 18:07:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:54,676 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2021-11-13 18:07:54,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:07:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2021-11-13 18:07:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-13 18:07:54,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:54,677 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:54,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-13 18:07:54,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-13 18:07:54,878 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:07:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1187088614, now seen corresponding path program 72 times [2021-11-13 18:07:54,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:54,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024626208] [2021-11-13 18:07:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:54,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1 proven. 2582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:56,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:56,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024626208] [2021-11-13 18:07:56,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024626208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:07:56,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361083706] [2021-11-13 18:07:56,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:07:56,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:56,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:07:56,519 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:07:56,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-13 18:08:26,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-11-13 18:08:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:08:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-13 18:08:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:28,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:08:28,367 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-13 18:08:28,368 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 31 treesize of output 30 [2021-11-13 18:08:28,463 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-13 18:08:28,463 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 42 treesize of output 44 [2021-11-13 18:08:28,895 INFO L354 Elim1Store]: treesize reduction 130, result has 16.1 percent of original size [2021-11-13 18:08:28,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 62 [2021-11-13 18:08:34,402 INFO L354 Elim1Store]: treesize reduction 62, result has 39.8 percent of original size [2021-11-13 18:08:34,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 86 [2021-11-13 18:08:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1128 proven. 1455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:34,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2021-11-13 18:09:10,913 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 1086 treesize of output 1072 [2021-11-13 18:09:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1012 proven. 1563 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:11,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361083706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:11,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:11,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 61, 61] total 149 [2021-11-13 18:09:11,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805578273] [2021-11-13 18:09:11,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:11,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-11-13 18:09:11,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-11-13 18:09:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2324, Invalid=19697, Unknown=31, NotChecked=0, Total=22052 [2021-11-13 18:09:11,356 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 149 states, 149 states have (on average 3.557046979865772) internal successors, (530), 149 states have internal predecessors, (530), 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 18:09:23,786 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4 4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= 24 (select (store .cse0 .cse1 |c_ULTIMATE.start_main_~i~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 96))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (or (<= c_~SIZE~0 .cse2) (<= .cse2 (select .cse0 .cse1)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_2971| Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (or (< |v_ULTIMATE.start_main_~i~0#1_2971| 23) (<= .cse3 |v_ULTIMATE.start_main_~i~0#1_2971|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_2971| 1) (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) .cse3) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2971| 4) 4)))))) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4))) (<= 25 |c_ULTIMATE.start_main_~i~0#1|) (exists ((v_arrayElimCell_248 Int)) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (* v_arrayElimCell_248 4)) (.cse7 (+ 2 v_arrayElimCell_248))) (and (= (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6)) v_arrayElimCell_248) (<= v_arrayElimCell_248 24) (<= c_~SIZE~0 (+ 3 v_arrayElimCell_248)) (< .cse7 c_~SIZE~0) (= (+ v_arrayElimCell_248 1) (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4))) (= (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 8)) .cse7))))))) is different from false [2021-11-13 18:09:24,588 WARN L838 $PredicateComparison]: unable to prove that (and (<= 24 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 96))) (forall ((|v_ULTIMATE.start_main_~i~0#1_2971| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_2971| 23) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_2971|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_2971| 1) (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) |c_ULTIMATE.start_main_~i~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2971| 4) 4))))) (exists ((v_arrayElimCell_248 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* v_arrayElimCell_248 4)) (.cse2 (+ 2 v_arrayElimCell_248))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) v_arrayElimCell_248) (<= v_arrayElimCell_248 24) (<= c_~SIZE~0 (+ 3 v_arrayElimCell_248)) (< .cse2 c_~SIZE~0) (= (+ v_arrayElimCell_248 1) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 8)) .cse2))))) is different from false [2021-11-13 18:09:25,663 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (<= 24 (select (store .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4) |c_ULTIMATE.start_main_~i~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 96))) (forall ((|v_ULTIMATE.start_main_~i~0#1_2971| Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (or (< |v_ULTIMATE.start_main_~i~0#1_2971| 23) (<= .cse2 |v_ULTIMATE.start_main_~i~0#1_2971|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_2971| 1) (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) .cse2) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_2971| 4) 4)))))) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1))) (<= 25 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-11-13 18:10:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:11,039 INFO L93 Difference]: Finished difference Result 535 states and 540 transitions. [2021-11-13 18:10:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-11-13 18:10:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.557046979865772) internal successors, (530), 149 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-11-13 18:10:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:11,040 INFO L225 Difference]: With dead ends: 535 [2021-11-13 18:10:11,040 INFO L226 Difference]: Without dead ends: 221 [2021-11-13 18:10:11,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 407 SyntacticMatches, 4 SemanticMatches, 314 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 22580 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=6537, Invalid=91055, Unknown=76, NotChecked=1872, Total=99540 [2021-11-13 18:10:11,050 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 240 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2139.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 5098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.18ms SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 673 IncrementalHoareTripleChecker+Unchecked, 2530.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:11,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 2432 Invalid, 5098 Unknown, 0 Unchecked, 13.18ms Time], IncrementalHoareTripleChecker [123 Valid, 4302 Invalid, 0 Unknown, 673 Unchecked, 2530.03ms Time] [2021-11-13 18:10:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-13 18:10:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-11-13 18:10:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 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 18:10:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-11-13 18:10:11,212 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 212 [2021-11-13 18:10:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:11,213 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-11-13 18:10:11,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.557046979865772) internal successors, (530), 149 states have internal predecessors, (530), 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 18:10:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-11-13 18:10:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-13 18:10:11,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:11,214 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:11,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:11,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-13 18:10:11,414 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:11,415 INFO L85 PathProgramCache]: Analyzing trace with hash -774524400, now seen corresponding path program 73 times [2021-11-13 18:10:11,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:11,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284838083] [2021-11-13 18:10:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:11,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 13 proven. 2792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:13,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:13,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284838083] [2021-11-13 18:10:13,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284838083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:13,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205541676] [2021-11-13 18:10:13,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:10:13,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:13,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:13,755 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:13,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-13 18:10:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-13 18:10:13,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:10:14,364 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:10:14,364 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 18:10:14,448 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:10:14,449 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 37 treesize of output 39 [2021-11-13 18:10:14,661 INFO L354 Elim1Store]: treesize reduction 157, result has 17.4 percent of original size [2021-11-13 18:10:14,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 62 [2021-11-13 18:10:14,807 INFO L354 Elim1Store]: treesize reduction 230, result has 19.3 percent of original size [2021-11-13 18:10:14,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 86 [2021-11-13 18:10:15,379 INFO L354 Elim1Store]: treesize reduction 350, result has 13.8 percent of original size [2021-11-13 18:10:15,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 106 [2021-11-13 18:10:15,707 INFO L354 Elim1Store]: treesize reduction 454, result has 14.7 percent of original size [2021-11-13 18:10:15,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 130 [2021-11-13 18:10:18,253 INFO L354 Elim1Store]: treesize reduction 587, result has 13.2 percent of original size [2021-11-13 18:10:18,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 159 [2021-11-13 18:10:23,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:10:23,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:23,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2021-11-13 18:10:23,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470209115] [2021-11-13 18:10:23,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:23,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 18:10:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 18:10:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4605, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:10:23,255 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 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 18:10:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:29,824 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2021-11-13 18:10:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-13 18:10:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 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 220 [2021-11-13 18:10:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:29,826 INFO L225 Difference]: With dead ends: 241 [2021-11-13 18:10:29,826 INFO L226 Difference]: Without dead ends: 239 [2021-11-13 18:10:29,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=711, Invalid=21045, Unknown=0, NotChecked=0, Total=21756 [2021-11-13 18:10:29,827 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 158 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 8973 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2947.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 3108 SdHoareTripleChecker+Invalid, 9163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.26ms SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 8973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3527.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:29,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 3108 Invalid, 9163 Unknown, 0 Unchecked, 15.26ms Time], IncrementalHoareTripleChecker [190 Valid, 8973 Invalid, 0 Unknown, 0 Unchecked, 3527.88ms Time] [2021-11-13 18:10:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-13 18:10:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 225. [2021-11-13 18:10:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-11-13 18:10:29,958 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 220 [2021-11-13 18:10:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:29,958 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-11-13 18:10:29,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 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 18:10:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-11-13 18:10:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-13 18:10:29,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:29,959 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:29,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-13 18:10:30,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:30,160 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1250801658, now seen corresponding path program 74 times [2021-11-13 18:10:30,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:30,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110063848] [2021-11-13 18:10:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:30,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 5 proven. 2898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:32,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:32,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110063848] [2021-11-13 18:10:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110063848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:32,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588723586] [2021-11-13 18:10:32,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:10:32,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:32,293 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:32,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-13 18:10:32,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:10:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:10:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-13 18:10:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:32,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:10:32,988 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:10:32,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:10:33,100 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:10:33,100 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 37 treesize of output 39 [2021-11-13 18:10:33,385 INFO L354 Elim1Store]: treesize reduction 157, result has 17.4 percent of original size [2021-11-13 18:10:33,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 62 [2021-11-13 18:10:33,580 INFO L354 Elim1Store]: treesize reduction 230, result has 19.3 percent of original size [2021-11-13 18:10:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 86 [2021-11-13 18:10:34,314 INFO L354 Elim1Store]: treesize reduction 330, result has 16.7 percent of original size [2021-11-13 18:10:34,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 115 [2021-11-13 18:10:35,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:10:35,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:35,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-11-13 18:10:35,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286021551] [2021-11-13 18:10:35,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:35,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-13 18:10:35,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-13 18:10:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=4368, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:10:35,926 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 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 18:10:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:42,488 INFO L93 Difference]: Finished difference Result 239 states and 240 transitions. [2021-11-13 18:10:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-13 18:10:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 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 224 [2021-11-13 18:10:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:42,489 INFO L225 Difference]: With dead ends: 239 [2021-11-13 18:10:42,489 INFO L226 Difference]: Without dead ends: 237 [2021-11-13 18:10:42,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4157 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=669, Invalid=20793, Unknown=0, NotChecked=0, Total=21462 [2021-11-13 18:10:42,491 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 213 mSDsluCounter, 3047 mSDsCounter, 0 mSdLazyCounter, 9103 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2917.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 9352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.19ms SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 9103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3483.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:42,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3110 Invalid, 9352 Unknown, 0 Unchecked, 14.19ms Time], IncrementalHoareTripleChecker [249 Valid, 9103 Invalid, 0 Unknown, 0 Unchecked, 3483.39ms Time] [2021-11-13 18:10:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-13 18:10:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-11-13 18:10:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-11-13 18:10:42,634 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2021-11-13 18:10:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:42,635 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-11-13 18:10:42,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 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 18:10:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-11-13 18:10:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 18:10:42,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:42,636 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:42,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:42,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:42,852 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1404636420, now seen corresponding path program 75 times [2021-11-13 18:10:42,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:42,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583882738] [2021-11-13 18:10:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:42,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1 proven. 3004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:44,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:44,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583882738] [2021-11-13 18:10:44,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583882738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:44,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296075374] [2021-11-13 18:10:44,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:10:44,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:44,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:44,940 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:44,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-13 18:11:32,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-13 18:11:32,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-13 18:11:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:34,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:11:34,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:11:34,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-13 18:11:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:11:34,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:11:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:11:34,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:11:34,613 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 37 treesize of output 39 [2021-11-13 18:11:35,208 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-11-13 18:11:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 79 [2021-11-13 18:11:35,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:11:35,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:11:35,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2021-11-13 18:11:35,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419383895] [2021-11-13 18:11:35,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:35,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 18:11:35,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 18:11:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=8861, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:11:35,776 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 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 18:11:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:43,008 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2021-11-13 18:11:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-13 18:11:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 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 228 [2021-11-13 18:11:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:43,010 INFO L225 Difference]: With dead ends: 237 [2021-11-13 18:11:43,010 INFO L226 Difference]: Without dead ends: 235 [2021-11-13 18:11:43,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6901 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=740, Invalid=30060, Unknown=0, NotChecked=0, Total=30800 [2021-11-13 18:11:43,012 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 212 mSDsluCounter, 3002 mSDsCounter, 0 mSdLazyCounter, 9383 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3128.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 3063 SdHoareTripleChecker+Invalid, 9637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.87ms SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 9383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3741.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:43,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 3063 Invalid, 9637 Unknown, 0 Unchecked, 15.87ms Time], IncrementalHoareTripleChecker [254 Valid, 9383 Invalid, 0 Unknown, 0 Unchecked, 3741.59ms Time] [2021-11-13 18:11:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-13 18:11:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2021-11-13 18:11:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 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 18:11:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2021-11-13 18:11:43,256 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 228 [2021-11-13 18:11:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:43,256 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2021-11-13 18:11:43,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 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 18:11:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2021-11-13 18:11:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-13 18:11:43,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:43,258 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:43,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:43,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-13 18:11:43,472 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2109656334, now seen corresponding path program 76 times [2021-11-13 18:11:43,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:43,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022628092] [2021-11-13 18:11:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3111 backedges. 1 proven. 3110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:45,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:45,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022628092] [2021-11-13 18:11:45,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022628092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:45,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197247602] [2021-11-13 18:11:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:11:45,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:45,435 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:11:45,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-13 18:11:45,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:11:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-13 18:11:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:11:46,335 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-13 18:11:46,335 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 28 treesize of output 27 [2021-11-13 18:11:46,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:11:46,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:11:46,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-11-13 18:11:46,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631806116] [2021-11-13 18:11:46,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 18:11:46,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 18:11:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=3894, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:11:46,440 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 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 18:11:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:55,040 INFO L93 Difference]: Finished difference Result 369 states and 371 transitions. [2021-11-13 18:11:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-13 18:11:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 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 232 [2021-11-13 18:11:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:55,041 INFO L225 Difference]: With dead ends: 369 [2021-11-13 18:11:55,041 INFO L226 Difference]: Without dead ends: 367 [2021-11-13 18:11:55,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6648 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=805, Invalid=29645, Unknown=0, NotChecked=0, Total=30450 [2021-11-13 18:11:55,044 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 315 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 10180 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3475.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 3465 SdHoareTripleChecker+Invalid, 10550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.62ms SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 10180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4151.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:55,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 3465 Invalid, 10550 Unknown, 0 Unchecked, 17.62ms Time], IncrementalHoareTripleChecker [370 Valid, 10180 Invalid, 0 Unknown, 0 Unchecked, 4151.40ms Time] [2021-11-13 18:11:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-13 18:11:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 245. [2021-11-13 18:11:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 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 18:11:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-11-13 18:11:55,227 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 232 [2021-11-13 18:11:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:55,227 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-11-13 18:11:55,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 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 18:11:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-11-13 18:11:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 18:11:55,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:55,229 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:55,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:55,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:55,429 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1891872685, now seen corresponding path program 77 times [2021-11-13 18:11:55,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:55,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998766576] [2021-11-13 18:11:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:55,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 1 proven. 3227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:57,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:57,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998766576] [2021-11-13 18:11:57,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998766576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:57,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84981739] [2021-11-13 18:11:57,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:11:57,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:57,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:57,743 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:11:57,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-13 18:12:14,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-13 18:12:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-13 18:12:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:15,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:12:15,597 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:12:15,598 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 18:12:15,684 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-13 18:12:15,684 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 37 treesize of output 39 [2021-11-13 18:12:15,888 INFO L354 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2021-11-13 18:12:15,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 49 [2021-11-13 18:12:20,595 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-13 18:12:20,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 36 [2021-11-13 18:12:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 2 proven. 3226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:12:20,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:21,923 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_3221| Int)) (or (<= 27 (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_3221| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) |v_ULTIMATE.start_main_~i~0#1_3221|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 4) (+ |v_ULTIMATE.start_main_~i~0#1_3221| 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 108))) (< |v_ULTIMATE.start_main_~i~0#1_3221| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-13 18:12:21,928 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 39 treesize of output 37 [2021-11-13 18:12:21,934 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 1637 treesize of output 1605 [2021-11-13 18:12:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 6 proven. 3193 refuted. 0 times theorem prover too weak. 0 trivial. 29 not checked. [2021-11-13 18:12:23,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84981739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:23,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:23,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 65, 64] total 101 [2021-11-13 18:12:23,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103292128] [2021-11-13 18:12:23,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:23,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-13 18:12:23,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-13 18:12:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=9451, Unknown=1, NotChecked=196, Total=10100 [2021-11-13 18:12:23,338 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 101 states, 101 states have (on average 3.6534653465346536) internal successors, (369), 101 states have internal predecessors, (369), 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 18:12:27,506 WARN L838 $PredicateComparison]: unable to prove that (and (= (* 4 |c_ULTIMATE.start_main_~i~0#1|) 108) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_3221| Int)) (or (<= 27 (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_3221| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) |v_ULTIMATE.start_main_~i~0#1_3221|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 4) (+ |v_ULTIMATE.start_main_~i~0#1_3221| 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 108))) (< |v_ULTIMATE.start_main_~i~0#1_3221| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-13 18:12:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:33,454 INFO L93 Difference]: Finished difference Result 363 states and 365 transitions. [2021-11-13 18:12:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-11-13 18:12:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.6534653465346536) internal successors, (369), 101 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-13 18:12:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:33,456 INFO L225 Difference]: With dead ends: 363 [2021-11-13 18:12:33,456 INFO L226 Difference]: Without dead ends: 361 [2021-11-13 18:12:33,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 454 SyntacticMatches, 8 SemanticMatches, 217 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11998 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1550, Invalid=45328, Unknown=2, NotChecked=862, Total=47742 [2021-11-13 18:12:33,458 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 213 mSDsluCounter, 8056 mSDsCounter, 0 mSdLazyCounter, 10432 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3503.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 8174 SdHoareTripleChecker+Invalid, 13984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.38ms SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 10432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3375 IncrementalHoareTripleChecker+Unchecked, 4181.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:33,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 8174 Invalid, 13984 Unknown, 0 Unchecked, 30.38ms Time], IncrementalHoareTripleChecker [177 Valid, 10432 Invalid, 0 Unknown, 3375 Unchecked, 4181.08ms Time] [2021-11-13 18:12:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-13 18:12:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 237. [2021-11-13 18:12:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 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 18:12:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-11-13 18:12:33,621 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 236 [2021-11-13 18:12:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:33,621 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-11-13 18:12:33,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.6534653465346536) internal successors, (369), 101 states have internal predecessors, (369), 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 18:12:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-11-13 18:12:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 18:12:33,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:33,622 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:33,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-13 18:12:33,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:33,823 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:33,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1351518184, now seen corresponding path program 78 times [2021-11-13 18:12:33,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:33,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886950980] [2021-11-13 18:12:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:33,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3221 backedges. 0 proven. 3221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:12:35,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:35,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886950980] [2021-11-13 18:12:35,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886950980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:35,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879728984] [2021-11-13 18:12:35,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:12:35,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:35,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:35,844 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:35,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e08fb0a-61b6-4d67-84d9-d34df5f1fb50/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process