./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i --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_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/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_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/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_5befcac0-2fa2-4308-b17b-b7f035ceb730/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 073ee5c5f9e0a51509973bbde311a97e7673effbb0d5db6a027ba4e786762a02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:51:37,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:51:37,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:51:37,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:51:37,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:51:37,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:51:37,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:51:37,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:51:37,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:51:37,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:51:37,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:51:37,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:51:37,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:51:37,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:51:37,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:51:37,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:51:37,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:51:37,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:51:37,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:51:37,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:51:37,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:51:37,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:51:37,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:51:37,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:51:37,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:51:37,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:51:37,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:51:37,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:51:37,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:51:37,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:51:37,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:51:37,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:51:37,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:51:37,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:51:37,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:51:37,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:51:37,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:51:37,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:51:37,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:51:37,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:51:37,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:51:37,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:51:37,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:51:37,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:51:37,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:51:37,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:51:37,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:51:37,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:51:37,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:51:37,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:51:37,413 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:51:37,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:51:37,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:51:37,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:51:37,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:51:37,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:51:37,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:51:37,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:51:37,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:51:37,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:51:37,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:51:37,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:51:37,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:51:37,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:51:37,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:51:37,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:51:37,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:51:37,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:51:37,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:51:37,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:51:37,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:51:37,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:51:37,419 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:51:37,419 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:51:37,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:51:37,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:51:37,420 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_5befcac0-2fa2-4308-b17b-b7f035ceb730/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 073ee5c5f9e0a51509973bbde311a97e7673effbb0d5db6a027ba4e786762a02 [2021-11-13 18:51:37,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:51:37,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:51:37,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:51:37,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:51:37,723 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:51:37,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2021-11-13 18:51:37,825 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/data/f698dadf2/53e1d98bb67d4e10ac022377287b6f4d/FLAGad5708393 [2021-11-13 18:51:38,407 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:51:38,408 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2021-11-13 18:51:38,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/data/f698dadf2/53e1d98bb67d4e10ac022377287b6f4d/FLAGad5708393 [2021-11-13 18:51:38,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/data/f698dadf2/53e1d98bb67d4e10ac022377287b6f4d [2021-11-13 18:51:38,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:51:38,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:51:38,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:51:38,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:51:38,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:51:38,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:51:38" (1/1) ... [2021-11-13 18:51:38,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48018a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:38, skipping insertion in model container [2021-11-13 18:51:38,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:51:38" (1/1) ... [2021-11-13 18:51:38,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:51:38,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:51:39,062 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_5befcac0-2fa2-4308-b17b-b7f035ceb730/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i[24291,24304] [2021-11-13 18:51:39,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:51:39,081 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:51:39,170 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_5befcac0-2fa2-4308-b17b-b7f035ceb730/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i[24291,24304] [2021-11-13 18:51:39,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:51:39,208 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:51:39,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39 WrapperNode [2021-11-13 18:51:39,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:51:39,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:51:39,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:51:39,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:51:39,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:51:39,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:51:39,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:51:39,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:51:39,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:51:39,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:51:39,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:51:39,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:51:39,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (1/1) ... [2021-11-13 18:51:39,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:51:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:39,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:51:39,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:51:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 18:51:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 18:51:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:51:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:51:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:51:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:51:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:51:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:51:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:51:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:51:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:51:39,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:51:39,655 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 18:51:40,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:51:40,036 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-13 18:51:40,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:51:40 BoogieIcfgContainer [2021-11-13 18:51:40,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:51:40,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:51:40,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:51:40,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:51:40,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:51:38" (1/3) ... [2021-11-13 18:51:40,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a4041e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:51:40, skipping insertion in model container [2021-11-13 18:51:40,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:39" (2/3) ... [2021-11-13 18:51:40,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a4041e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:51:40, skipping insertion in model container [2021-11-13 18:51:40,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:51:40" (3/3) ... [2021-11-13 18:51:40,049 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2021-11-13 18:51:40,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:51:40,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:51:40,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:51:40,133 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 18:51:40,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:51:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 50 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:51:40,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:40,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:40,159 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -146872147, now seen corresponding path program 1 times [2021-11-13 18:51:40,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:40,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907446005] [2021-11-13 18:51:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:40,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:40,353 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 18:51:40,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:40,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907446005] [2021-11-13 18:51:40,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907446005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:51:40,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:51:40,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:51:40,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160949663] [2021-11-13 18:51:40,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:51:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:51:40,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:51:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:51:40,396 INFO L87 Difference]: Start difference. First operand has 52 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 50 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 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 8.0) internal successors, (16), 2 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 18:51:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:40,417 INFO L93 Difference]: Finished difference Result 102 states and 160 transitions. [2021-11-13 18:51:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:51:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 18:51:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:40,424 INFO L225 Difference]: With dead ends: 102 [2021-11-13 18:51:40,425 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 18:51:40,427 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 18:51:40,431 INFO L933 BasicCegarLoop]: 72 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, 72 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:40,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:51:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 18:51:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-13 18:51:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 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 18:51:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2021-11-13 18:51:40,468 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 16 [2021-11-13 18:51:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:40,469 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2021-11-13 18:51:40,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 18:51:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2021-11-13 18:51:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:51:40,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:40,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:40,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:51:40,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1237728308, now seen corresponding path program 1 times [2021-11-13 18:51:40,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:40,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137534216] [2021-11-13 18:51:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:40,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:40,589 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 18:51:40,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:40,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137534216] [2021-11-13 18:51:40,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137534216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:51:40,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:51:40,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:51:40,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010479803] [2021-11-13 18:51:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:51:40,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:51:40,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:51:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:51:40,593 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 18:51:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:40,624 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2021-11-13 18:51:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:51:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Word has length 21 [2021-11-13 18:51:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:40,627 INFO L225 Difference]: With dead ends: 71 [2021-11-13 18:51:40,627 INFO L226 Difference]: Without dead ends: 51 [2021-11-13 18:51:40,628 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 18:51:40,629 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 30 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:40,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 5 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 19.36ms Time] [2021-11-13 18:51:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-13 18:51:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-13 18:51:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:51:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2021-11-13 18:51:40,640 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 21 [2021-11-13 18:51:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:40,641 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2021-11-13 18:51:40,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 18:51:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2021-11-13 18:51:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:51:40,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:40,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:40,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:51:40,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1368149959, now seen corresponding path program 1 times [2021-11-13 18:51:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:40,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249226805] [2021-11-13 18:51:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:40,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:40,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:40,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249226805] [2021-11-13 18:51:40,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249226805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:51:40,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:51:40,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:51:40,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380198213] [2021-11-13 18:51:40,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:51:40,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:51:40,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:51:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:51:40,780 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:41,159 INFO L93 Difference]: Finished difference Result 142 states and 208 transitions. [2021-11-13 18:51:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:51:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 18:51:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:41,161 INFO L225 Difference]: With dead ends: 142 [2021-11-13 18:51:41,161 INFO L226 Difference]: Without dead ends: 106 [2021-11-13 18:51:41,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:51:41,163 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 73 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 248.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.57ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 317.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:41,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 168 Invalid, 131 Unknown, 0 Unchecked, 4.57ms Time], IncrementalHoareTripleChecker [14 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 317.52ms Time] [2021-11-13 18:51:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-13 18:51:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2021-11-13 18:51:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4931506849315068) internal successors, (109), 73 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:51:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 109 transitions. [2021-11-13 18:51:41,187 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 109 transitions. Word has length 27 [2021-11-13 18:51:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:41,187 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 109 transitions. [2021-11-13 18:51:41,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 109 transitions. [2021-11-13 18:51:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:51:41,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:41,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:41,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:51:41,192 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2109168887, now seen corresponding path program 1 times [2021-11-13 18:51:41,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:41,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229005612] [2021-11-13 18:51:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:41,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:41,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:41,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229005612] [2021-11-13 18:51:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229005612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:51:41,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:51:41,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:51:41,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490024037] [2021-11-13 18:51:41,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:51:41,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:51:41,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:51:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:51:41,313 INFO L87 Difference]: Start difference. First operand 74 states and 109 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:41,466 INFO L93 Difference]: Finished difference Result 99 states and 138 transitions. [2021-11-13 18:51:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:51:41,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 18:51:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:41,468 INFO L225 Difference]: With dead ends: 99 [2021-11-13 18:51:41,468 INFO L226 Difference]: Without dead ends: 95 [2021-11-13 18:51:41,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:51:41,470 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 17 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:41,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 194 Invalid, 58 Unknown, 0 Unchecked, 5.56ms Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 93.65ms Time] [2021-11-13 18:51:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-13 18:51:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2021-11-13 18:51:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 18:51:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 121 transitions. [2021-11-13 18:51:41,508 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 121 transitions. Word has length 27 [2021-11-13 18:51:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:41,508 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 121 transitions. [2021-11-13 18:51:41,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 121 transitions. [2021-11-13 18:51:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:51:41,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:41,510 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:41,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:51:41,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash -264583150, now seen corresponding path program 1 times [2021-11-13 18:51:41,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:41,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198840540] [2021-11-13 18:51:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:41,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:41,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:41,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198840540] [2021-11-13 18:51:41,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198840540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:51:41,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:51:41,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:51:41,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212723408] [2021-11-13 18:51:41,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:51:41,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:51:41,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:51:41,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:51:41,600 INFO L87 Difference]: Start difference. First operand 83 states and 121 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:51:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:41,711 INFO L93 Difference]: Finished difference Result 101 states and 140 transitions. [2021-11-13 18:51:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:51:41,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-13 18:51:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:41,713 INFO L225 Difference]: With dead ends: 101 [2021-11-13 18:51:41,713 INFO L226 Difference]: Without dead ends: 93 [2021-11-13 18:51:41,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:51:41,715 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 15 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:41,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 199 Invalid, 61 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 83.21ms Time] [2021-11-13 18:51:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-13 18:51:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-11-13 18:51:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 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 18:51:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2021-11-13 18:51:41,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 29 [2021-11-13 18:51:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:41,726 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2021-11-13 18:51:41,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:51:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2021-11-13 18:51:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:51:41,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:41,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:41,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:51:41,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 760119826, now seen corresponding path program 1 times [2021-11-13 18:51:41,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:41,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001680099] [2021-11-13 18:51:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:41,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:41,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:41,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001680099] [2021-11-13 18:51:41,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001680099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:51:41,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:51:41,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:51:41,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234535152] [2021-11-13 18:51:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:51:41,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:51:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:51:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:51:41,868 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:51:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:41,962 INFO L93 Difference]: Finished difference Result 101 states and 140 transitions. [2021-11-13 18:51:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:51:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-13 18:51:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:41,966 INFO L225 Difference]: With dead ends: 101 [2021-11-13 18:51:41,966 INFO L226 Difference]: Without dead ends: 90 [2021-11-13 18:51:41,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:51:41,976 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:41,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 187 Invalid, 53 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 67.20ms Time] [2021-11-13 18:51:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-13 18:51:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-11-13 18:51:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 77 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 114 transitions. [2021-11-13 18:51:41,989 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 114 transitions. Word has length 29 [2021-11-13 18:51:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:41,990 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 114 transitions. [2021-11-13 18:51:41,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:51:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 114 transitions. [2021-11-13 18:51:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:51:42,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:42,004 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:42,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:51:42,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -219954082, now seen corresponding path program 1 times [2021-11-13 18:51:42,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:42,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793794205] [2021-11-13 18:51:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:42,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:42,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793794205] [2021-11-13 18:51:42,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793794205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402795504] [2021-11-13 18:51:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:42,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:42,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:42,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:42,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:51:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:51:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:42,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:51:42,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:51:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:51:42,530 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 11 treesize of output 7 [2021-11-13 18:51:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:51:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:51:42,671 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:51:42,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:51:42,792 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:51:42,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-13 18:51:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:42,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:43,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2021-11-13 18:51:44,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_main_~p~0#1.offset_22| Int)) (= 2 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_1)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_22| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-13 18:51:44,337 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 438 treesize of output 422 [2021-11-13 18:51:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-13 18:51:44,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402795504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:44,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:44,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-13 18:51:44,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994828337] [2021-11-13 18:51:44,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:44,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:51:44,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:44,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:51:44,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=168, Unknown=2, NotChecked=54, Total=272 [2021-11-13 18:51:44,889 INFO L87 Difference]: Start difference. First operand 78 states and 114 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:51:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:47,153 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2021-11-13 18:51:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:51:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 31 [2021-11-13 18:51:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:47,156 INFO L225 Difference]: With dead ends: 116 [2021-11-13 18:51:47,156 INFO L226 Difference]: Without dead ends: 112 [2021-11-13 18:51:47,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=71, Invalid=240, Unknown=3, NotChecked=66, Total=380 [2021-11-13 18:51:47,157 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 211.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:47,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 538 Invalid, 340 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 135 Unchecked, 211.88ms Time] [2021-11-13 18:51:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-13 18:51:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 87. [2021-11-13 18:51:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 86 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2021-11-13 18:51:47,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 31 [2021-11-13 18:51:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:47,169 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2021-11-13 18:51:47,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:51:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2021-11-13 18:51:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:51:47,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:47,170 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:47,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:47,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:51:47,395 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash 643447582, now seen corresponding path program 1 times [2021-11-13 18:51:47,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:47,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574129453] [2021-11-13 18:51:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:47,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:47,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:47,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574129453] [2021-11-13 18:51:47,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574129453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:47,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534385409] [2021-11-13 18:51:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:47,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:47,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:47,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:51:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:51:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:47,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:51:47,742 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:51:47,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:51:47,750 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 11 treesize of output 7 [2021-11-13 18:51:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:51:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:51:47,883 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:51:47,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:51:47,942 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:51:47,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-13 18:51:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:47,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 113 [2021-11-13 18:51:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:48,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534385409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:48,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:48,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-13 18:51:48,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714603030] [2021-11-13 18:51:48,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:48,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:51:48,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:51:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:51:48,279 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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 18:51:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:48,540 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2021-11-13 18:51:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:51:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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 31 [2021-11-13 18:51:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:48,542 INFO L225 Difference]: With dead ends: 114 [2021-11-13 18:51:48,542 INFO L226 Difference]: Without dead ends: 108 [2021-11-13 18:51:48,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:51:48,544 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 87 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.80ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 159.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:48,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 395 Invalid, 265 Unknown, 0 Unchecked, 2.80ms Time], IncrementalHoareTripleChecker [37 Valid, 143 Invalid, 0 Unknown, 85 Unchecked, 159.59ms Time] [2021-11-13 18:51:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-13 18:51:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-11-13 18:51:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.431578947368421) internal successors, (136), 95 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 18:51:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-11-13 18:51:48,554 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 31 [2021-11-13 18:51:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:48,554 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-11-13 18:51:48,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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 18:51:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2021-11-13 18:51:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:51:48,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:48,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:48,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:48,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:48,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -873795143, now seen corresponding path program 1 times [2021-11-13 18:51:48,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:48,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107458641] [2021-11-13 18:51:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:48,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:48,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:48,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107458641] [2021-11-13 18:51:48,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107458641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:48,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782808482] [2021-11-13 18:51:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:48,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:48,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:49,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:51:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:51:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:49,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:51:49,167 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:51:49,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:51:49,207 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 18:51:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 18:51:49,284 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-13 18:51:49,284 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-13 18:51:49,287 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 85 treesize of output 75 [2021-11-13 18:51:49,299 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-13 18:51:49,299 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-13 18:51:49,356 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 48 treesize of output 30 [2021-11-13 18:51:49,359 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 27 treesize of output 15 [2021-11-13 18:51:49,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 18:51:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:49,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:49,421 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 93 treesize of output 77 [2021-11-13 18:51:49,512 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 83 treesize of output 77 [2021-11-13 18:51:49,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:51:49,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:51:49,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:51:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:49,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782808482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:49,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:49,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2021-11-13 18:51:49,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839207052] [2021-11-13 18:51:49,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:49,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:51:49,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:51:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:51:49,724 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:50,164 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-11-13 18:51:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:51:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-13 18:51:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:50,166 INFO L225 Difference]: With dead ends: 116 [2021-11-13 18:51:50,166 INFO L226 Difference]: Without dead ends: 112 [2021-11-13 18:51:50,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:51:50,167 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 192 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.93ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 259.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:50,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 418 Invalid, 406 Unknown, 0 Unchecked, 3.93ms Time], IncrementalHoareTripleChecker [64 Valid, 283 Invalid, 0 Unknown, 59 Unchecked, 259.98ms Time] [2021-11-13 18:51:50,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-13 18:51:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-11-13 18:51:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 99 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 141 transitions. [2021-11-13 18:51:50,176 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 141 transitions. Word has length 33 [2021-11-13 18:51:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:50,176 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 141 transitions. [2021-11-13 18:51:50,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 141 transitions. [2021-11-13 18:51:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:51:50,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:50,178 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:50,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:50,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:50,391 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:50,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1557127099, now seen corresponding path program 2 times [2021-11-13 18:51:50,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:50,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371044650] [2021-11-13 18:51:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:50,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:50,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:50,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371044650] [2021-11-13 18:51:50,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371044650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:50,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948754896] [2021-11-13 18:51:50,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:51:50,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:50,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:50,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:51:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:51:50,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:50,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:51:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:50,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:51:50,783 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 11 treesize of output 7 [2021-11-13 18:51:50,803 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 18:51:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 18:51:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:51:50,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:51:50,952 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 18:51:50,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-13 18:51:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-13 18:51:51,056 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:51:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-13 18:51:51,194 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-13 18:51:51,194 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 38 treesize of output 40 [2021-11-13 18:51:51,397 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-13 18:51:51,398 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 41 treesize of output 25 [2021-11-13 18:51:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:51,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:52,006 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2021-11-13 18:51:52,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| Int) (v_DerPreprocessor_5 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_5)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_42| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2021-11-13 18:51:55,085 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 108149 treesize of output 107125 [2021-11-13 18:52:03,462 WARN L227 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 709 DAG size of output: 454 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:52:03,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:52:03,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:52:03,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-13 18:52:03,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941110042] [2021-11-13 18:52:03,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:03,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:52:03,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:52:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=352, Unknown=3, NotChecked=78, Total=506 [2021-11-13 18:52:03,479 INFO L87 Difference]: Start difference. First operand 100 states and 141 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:03,921 INFO L93 Difference]: Finished difference Result 123 states and 167 transitions. [2021-11-13 18:52:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:52:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:52:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:03,923 INFO L225 Difference]: With dead ends: 123 [2021-11-13 18:52:03,923 INFO L226 Difference]: Without dead ends: 119 [2021-11-13 18:52:03,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=176, Invalid=759, Unknown=3, NotChecked=118, Total=1056 [2021-11-13 18:52:03,924 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 68 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:03,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 311 Invalid, 191 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [33 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 206.65ms Time] [2021-11-13 18:52:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-13 18:52:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2021-11-13 18:52:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4134615384615385) internal successors, (147), 104 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 147 transitions. [2021-11-13 18:52:03,933 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 147 transitions. Word has length 35 [2021-11-13 18:52:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:03,933 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 147 transitions. [2021-11-13 18:52:03,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 147 transitions. [2021-11-13 18:52:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:52:03,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:03,935 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:03,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:04,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:52:04,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2145137748, now seen corresponding path program 2 times [2021-11-13 18:52:04,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:04,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236410058] [2021-11-13 18:52:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:04,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:04,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:04,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236410058] [2021-11-13 18:52:04,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236410058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:04,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989732128] [2021-11-13 18:52:04,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:52:04,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:04,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:04,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:04,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:52:04,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:52:04,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:52:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:04,601 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 18:52:04,611 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 13 treesize of output 9 [2021-11-13 18:52:04,719 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-13 18:52:04,720 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-11-13 18:52:04,723 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 66 treesize of output 58 [2021-11-13 18:52:04,736 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-13 18:52:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-11-13 18:52:04,841 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 44 treesize of output 36 [2021-11-13 18:52:04,844 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 33 treesize of output 21 [2021-11-13 18:52:04,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:04,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-13 18:52:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:04,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:05,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:52:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 99 [2021-11-13 18:52:05,158 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 129 treesize of output 123 [2021-11-13 18:52:05,166 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 152 treesize of output 146 [2021-11-13 18:52:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:05,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989732128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:05,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:05,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-13 18:52:05,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89704212] [2021-11-13 18:52:05,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:05,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:52:05,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:52:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:52:05,377 INFO L87 Difference]: Start difference. First operand 105 states and 147 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:05,850 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-11-13 18:52:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:52:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:52:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:05,852 INFO L225 Difference]: With dead ends: 130 [2021-11-13 18:52:05,852 INFO L226 Difference]: Without dead ends: 119 [2021-11-13 18:52:05,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:52:05,854 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 133 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 202.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:05,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 346 Invalid, 301 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [54 Valid, 208 Invalid, 0 Unknown, 39 Unchecked, 202.05ms Time] [2021-11-13 18:52:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-13 18:52:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2021-11-13 18:52:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4038461538461537) internal successors, (146), 104 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 18:52:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 146 transitions. [2021-11-13 18:52:05,866 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 146 transitions. Word has length 35 [2021-11-13 18:52:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:05,868 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 146 transitions. [2021-11-13 18:52:05,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 146 transitions. [2021-11-13 18:52:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:52:05,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:05,869 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:05,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:06,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:06,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash 66922580, now seen corresponding path program 1 times [2021-11-13 18:52:06,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:06,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799690632] [2021-11-13 18:52:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:06,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:52:06,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:06,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799690632] [2021-11-13 18:52:06,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799690632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:06,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104775709] [2021-11-13 18:52:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:06,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:06,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:06,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:06,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:52:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:52:06,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:06,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:06,369 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 11 treesize of output 7 [2021-11-13 18:52:06,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:06,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:52:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:06,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:52:06,487 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:52:06,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:52:06,534 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:52:06,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-13 18:52:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:52:06,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:11,270 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 197 treesize of output 189 [2021-11-13 18:52:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:52:11,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104775709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:11,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:11,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-11-13 18:52:11,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478481786] [2021-11-13 18:52:11,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:11,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:52:11,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:52:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=242, Unknown=4, NotChecked=0, Total=306 [2021-11-13 18:52:11,402 INFO L87 Difference]: Start difference. First operand 105 states and 146 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:52:12,132 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (= (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|) 1)) is different from false [2021-11-13 18:52:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:12,152 INFO L93 Difference]: Finished difference Result 123 states and 167 transitions. [2021-11-13 18:52:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:52:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:52:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:12,154 INFO L225 Difference]: With dead ends: 123 [2021-11-13 18:52:12,154 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 18:52:12,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=110, Invalid=395, Unknown=5, NotChecked=42, Total=552 [2021-11-13 18:52:12,156 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 48 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 97.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:12,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 360 Invalid, 190 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [28 Valid, 73 Invalid, 0 Unknown, 89 Unchecked, 97.56ms Time] [2021-11-13 18:52:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 18:52:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2021-11-13 18:52:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.4059405940594059) internal successors, (142), 101 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 18:52:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2021-11-13 18:52:12,162 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 35 [2021-11-13 18:52:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:12,162 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2021-11-13 18:52:12,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:52:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2021-11-13 18:52:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:52:12,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:12,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:12,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:12,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:12,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1257425147, now seen corresponding path program 1 times [2021-11-13 18:52:12,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:12,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198124737] [2021-11-13 18:52:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:12,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:12,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:12,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198124737] [2021-11-13 18:52:12,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198124737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:12,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526252815] [2021-11-13 18:52:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:12,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:12,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:12,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:52:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:12,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:52:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:12,762 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 18:52:12,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 18:52:12,772 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 11 treesize of output 7 [2021-11-13 18:52:12,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:52:12,943 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 18:52:12,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-13 18:52:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-13 18:52:13,045 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:52:13,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-13 18:52:13,169 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-13 18:52:13,169 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 38 treesize of output 40 [2021-11-13 18:52:13,256 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-13 18:52:13,257 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 41 treesize of output 25 [2021-11-13 18:52:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:13,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:14,055 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-13 18:52:16,298 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 22537 treesize of output 22281 [2021-11-13 18:52:17,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:52:17,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:52:17,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-13 18:52:17,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256537591] [2021-11-13 18:52:17,639 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:17,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:52:17,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:52:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=389, Unknown=2, NotChecked=40, Total=506 [2021-11-13 18:52:17,640 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:18,150 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2021-11-13 18:52:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:52:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:52:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:18,152 INFO L225 Difference]: With dead ends: 133 [2021-11-13 18:52:18,152 INFO L226 Difference]: Without dead ends: 129 [2021-11-13 18:52:18,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=189, Invalid=869, Unknown=2, NotChecked=62, Total=1122 [2021-11-13 18:52:18,153 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 70 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:18,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 418 Invalid, 264 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [31 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 244.55ms Time] [2021-11-13 18:52:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-13 18:52:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2021-11-13 18:52:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3909090909090909) internal successors, (153), 110 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 18:52:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2021-11-13 18:52:18,158 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 35 [2021-11-13 18:52:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2021-11-13 18:52:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2021-11-13 18:52:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:52:18,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:18,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:18,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 18:52:18,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:52:18,371 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash -658078444, now seen corresponding path program 1 times [2021-11-13 18:52:18,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:18,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023941253] [2021-11-13 18:52:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:18,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:18,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:18,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023941253] [2021-11-13 18:52:18,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023941253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:18,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070683680] [2021-11-13 18:52:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:18,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:18,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:18,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:52:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:52:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:18,674 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:18,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:52:18,719 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 18:52:18,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 18:52:18,813 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-13 18:52:18,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-13 18:52:18,818 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 85 treesize of output 75 [2021-11-13 18:52:18,835 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-13 18:52:18,836 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-13 18:52:18,875 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 48 treesize of output 30 [2021-11-13 18:52:18,882 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 27 treesize of output 15 [2021-11-13 18:52:18,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 18:52:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:18,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:18,983 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 72 treesize of output 56 [2021-11-13 18:52:19,091 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 83 treesize of output 77 [2021-11-13 18:52:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:19,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:52:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:19,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070683680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:19,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:19,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-11-13 18:52:19,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846032731] [2021-11-13 18:52:19,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:52:19,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:52:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:52:19,267 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 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 18:52:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:19,733 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2021-11-13 18:52:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:52:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 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) Word has length 35 [2021-11-13 18:52:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:19,735 INFO L225 Difference]: With dead ends: 129 [2021-11-13 18:52:19,735 INFO L226 Difference]: Without dead ends: 121 [2021-11-13 18:52:19,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:52:19,736 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 161 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 260.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:19,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 406 Invalid, 383 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [48 Valid, 274 Invalid, 0 Unknown, 61 Unchecked, 260.02ms Time] [2021-11-13 18:52:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-13 18:52:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2021-11-13 18:52:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3839285714285714) internal successors, (155), 112 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 18:52:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2021-11-13 18:52:19,743 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 155 transitions. Word has length 35 [2021-11-13 18:52:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:19,743 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 155 transitions. [2021-11-13 18:52:19,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 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 18:52:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 155 transitions. [2021-11-13 18:52:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:52:19,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:19,745 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:19,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:19,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:52:19,971 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash 366624532, now seen corresponding path program 1 times [2021-11-13 18:52:19,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:19,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228820867] [2021-11-13 18:52:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:19,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:20,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:20,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228820867] [2021-11-13 18:52:20,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228820867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:20,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807965719] [2021-11-13 18:52:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:20,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:20,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:20,150 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:20,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:52:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:52:20,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:20,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:20,328 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:52:20,371 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 18:52:20,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 18:52:20,466 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-13 18:52:20,467 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-13 18:52:20,471 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 85 treesize of output 75 [2021-11-13 18:52:20,484 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-13 18:52:20,485 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-13 18:52:20,526 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 48 treesize of output 30 [2021-11-13 18:52:20,529 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 27 treesize of output 15 [2021-11-13 18:52:20,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 18:52:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:20,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:20,636 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 72 treesize of output 56 [2021-11-13 18:52:20,741 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 83 treesize of output 77 [2021-11-13 18:52:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:52:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:20,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807965719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:20,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:20,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-11-13 18:52:20,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456701110] [2021-11-13 18:52:20,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:20,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:52:20,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:52:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:52:20,926 INFO L87 Difference]: Start difference. First operand 113 states and 155 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:21,400 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2021-11-13 18:52:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:52:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:52:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:21,401 INFO L225 Difference]: With dead ends: 129 [2021-11-13 18:52:21,401 INFO L226 Difference]: Without dead ends: 116 [2021-11-13 18:52:21,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:52:21,403 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 148 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 252.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:21,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 503 Invalid, 379 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [51 Valid, 256 Invalid, 0 Unknown, 72 Unchecked, 252.50ms Time] [2021-11-13 18:52:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-13 18:52:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2021-11-13 18:52:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 107 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 149 transitions. [2021-11-13 18:52:21,409 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 149 transitions. Word has length 35 [2021-11-13 18:52:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:21,409 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 149 transitions. [2021-11-13 18:52:21,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 149 transitions. [2021-11-13 18:52:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:52:21,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:21,411 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:21,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:21,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:52:21,631 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842976, now seen corresponding path program 3 times [2021-11-13 18:52:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:21,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402075999] [2021-11-13 18:52:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:21,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:21,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:21,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402075999] [2021-11-13 18:52:21,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402075999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:21,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761196767] [2021-11-13 18:52:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:52:21,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:21,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:21,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:21,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:52:22,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:52:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:22,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:52:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:22,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:22,135 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 18:52:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 18:52:22,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-13 18:52:22,231 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 11 treesize of output 7 [2021-11-13 18:52:22,310 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 11 treesize of output 7 [2021-11-13 18:52:22,326 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 18:52:22,327 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 50 treesize of output 30 [2021-11-13 18:52:22,342 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-13 18:52:22,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-13 18:52:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-11-13 18:52:22,456 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 18:52:22,457 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 84 [2021-11-13 18:52:22,463 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 123 treesize of output 99 [2021-11-13 18:52:22,474 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:52:22,474 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 96 treesize of output 91 [2021-11-13 18:52:22,623 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:52:22,624 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 110 [2021-11-13 18:52:22,636 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-13 18:52:22,637 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 148 treesize of output 139 [2021-11-13 18:52:22,656 INFO L354 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2021-11-13 18:52:22,656 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 109 [2021-11-13 18:52:22,833 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:22,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 61 [2021-11-13 18:52:22,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:52:22,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2021-11-13 18:52:22,926 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-13 18:52:22,927 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 33 treesize of output 25 [2021-11-13 18:52:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:22,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:23,302 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-11-13 18:52:23,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2090 treesize of output 2007 [2021-11-13 18:52:26,402 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 10111 treesize of output 9967 [2021-11-13 18:52:26,883 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 11149 treesize of output 11113 [2021-11-13 18:52:27,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:52:27,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:52:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:52:27,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120358895] [2021-11-13 18:52:27,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:52:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:52:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:52:27,169 INFO L87 Difference]: Start difference. First operand 108 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:27,792 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2021-11-13 18:52:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:52:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:52:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:27,793 INFO L225 Difference]: With dead ends: 131 [2021-11-13 18:52:27,793 INFO L226 Difference]: Without dead ends: 127 [2021-11-13 18:52:27,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:52:27,794 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 147 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 256.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:27,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 297 Invalid, 319 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [57 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 256.41ms Time] [2021-11-13 18:52:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-13 18:52:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-13 18:52:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 114 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 18:52:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2021-11-13 18:52:27,803 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 37 [2021-11-13 18:52:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:27,803 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2021-11-13 18:52:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2021-11-13 18:52:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:52:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:27,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:27,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-13 18:52:28,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:52:28,019 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash -426372960, now seen corresponding path program 1 times [2021-11-13 18:52:28,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:28,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235507892] [2021-11-13 18:52:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:28,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:28,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:28,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235507892] [2021-11-13 18:52:28,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235507892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:28,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292129832] [2021-11-13 18:52:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:28,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:28,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:28,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:52:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:28,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 18:52:28,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:28,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:28,437 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 18:52:28,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 18:52:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:52:28,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-13 18:52:28,612 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-13 18:52:28,612 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 25 treesize of output 23 [2021-11-13 18:52:28,631 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 11 treesize of output 7 [2021-11-13 18:52:28,646 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-13 18:52:28,646 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 56 treesize of output 32 [2021-11-13 18:52:28,660 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-13 18:52:28,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-13 18:52:28,740 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-13 18:52:28,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 118 [2021-11-13 18:52:28,750 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-13 18:52:28,751 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 141 [2021-11-13 18:52:28,763 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-11-13 18:52:28,763 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 150 treesize of output 104 [2021-11-13 18:52:28,863 INFO L354 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-11-13 18:52:28,863 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 93 [2021-11-13 18:52:28,879 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-13 18:52:28,880 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 144 [2021-11-13 18:52:28,901 INFO L354 Elim1Store]: treesize reduction 97, result has 16.4 percent of original size [2021-11-13 18:52:28,901 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 127 treesize of output 108 [2021-11-13 18:52:28,986 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-13 18:52:28,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 48 [2021-11-13 18:52:28,991 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 42 treesize of output 30 [2021-11-13 18:52:29,074 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:52:29,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-13 18:52:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:29,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:31,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|ULTIMATE.start_main_~p~0#1.offset| Int) (v_DerPreprocessor_21 Int)) (= 2 (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_21)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_22)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))))) is different from false [2021-11-13 18:52:40,402 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 947 treesize of output 869 [2021-11-13 18:52:41,582 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 19019 treesize of output 18767 [2021-11-13 18:52:42,201 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 23616 treesize of output 23508 [2021-11-13 18:52:42,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:52:42,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:52:42,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:52:42,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678256129] [2021-11-13 18:52:42,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:42,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:52:42,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:52:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=4, NotChecked=44, Total=600 [2021-11-13 18:52:42,881 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:43,721 INFO L93 Difference]: Finished difference Result 135 states and 180 transitions. [2021-11-13 18:52:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:52:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:52:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:43,728 INFO L225 Difference]: With dead ends: 135 [2021-11-13 18:52:43,728 INFO L226 Difference]: Without dead ends: 131 [2021-11-13 18:52:43,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=4, NotChecked=68, Total=1332 [2021-11-13 18:52:43,730 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 134 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 357.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:43,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 371 Invalid, 419 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [57 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 357.18ms Time] [2021-11-13 18:52:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-13 18:52:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-11-13 18:52:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 114 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 18:52:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2021-11-13 18:52:43,740 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 37 [2021-11-13 18:52:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2021-11-13 18:52:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2021-11-13 18:52:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:52:43,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:43,742 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:43,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:43,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:52:43,942 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash -650764960, now seen corresponding path program 1 times [2021-11-13 18:52:43,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:43,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379331380] [2021-11-13 18:52:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:43,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:44,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:44,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379331380] [2021-11-13 18:52:44,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379331380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:44,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40539018] [2021-11-13 18:52:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:44,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:44,144 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:44,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:52:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:52:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:44,295 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 18:52:44,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 18:52:44,307 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 11 treesize of output 7 [2021-11-13 18:52:44,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:44,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:52:44,405 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 19 treesize of output 18 [2021-11-13 18:52:44,422 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 18:52:44,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-13 18:52:44,487 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:52:44,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-13 18:52:44,639 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-13 18:52:44,639 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 38 treesize of output 40 [2021-11-13 18:52:44,814 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-13 18:52:44,814 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 41 treesize of output 25 [2021-11-13 18:52:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:44,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:47,341 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_26 Int) (|v_ULTIMATE.start_main_~p~0#1.offset_108| Int)) (not (= 2 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_26)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_108| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-13 18:52:49,493 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 2886 treesize of output 2854 [2021-11-13 18:52:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-13 18:52:50,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40539018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:50,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:50,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2021-11-13 18:52:50,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424429996] [2021-11-13 18:52:50,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:50,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:52:50,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:52:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=501, Unknown=2, NotChecked=46, Total=650 [2021-11-13 18:52:50,060 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:52:51,016 WARN L838 $PredicateComparison]: unable to prove that (and (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~p~0#1.offset|) (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|))) (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)))) is different from false [2021-11-13 18:52:56,526 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|))) (and (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~p~0#1.offset|) (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|))) (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2))) (= (select .cse0 0) 1) (or (= |c_ULTIMATE.start_main_#t~mem39#1| 1) (= (select .cse0 |c_ULTIMATE.start_main_~p~0#1.offset|) 3)) (= |c_ULTIMATE.start_main_~p~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_95| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_103| Int) (|v_ULTIMATE.start_main_~p~0#1.base_96| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_104| Int)) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_95|) |v_ULTIMATE.start_main_~p~0#1.offset_103|) 1) (not (= |v_ULTIMATE.start_main_~p~0#1.base_96| |v_ULTIMATE.start_main_~p~0#1.base_95|)) (not (= |v_ULTIMATE.start_main_~p~0#1.base_95| |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= |v_ULTIMATE.start_main_~p~0#1.base_96| |c_ULTIMATE.start_main_~p~0#1.base|)) (= 3 (select (select |c_#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_96|) |v_ULTIMATE.start_main_~p~0#1.offset_104|)))))) is different from false [2021-11-13 18:52:57,157 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|))) (and (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~p~0#1.offset|) (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|))) (= 3 |c_ULTIMATE.start_main_#t~mem41#1|) (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2))) (= (select .cse0 |c_ULTIMATE.start_main_~p~0#1.offset|) 3))) is different from false [2021-11-13 18:52:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:57,202 INFO L93 Difference]: Finished difference Result 150 states and 199 transitions. [2021-11-13 18:52:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:52:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 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 37 [2021-11-13 18:52:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:57,204 INFO L225 Difference]: With dead ends: 150 [2021-11-13 18:52:57,204 INFO L226 Difference]: Without dead ends: 140 [2021-11-13 18:52:57,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=176, Invalid=826, Unknown=6, NotChecked=252, Total=1260 [2021-11-13 18:52:57,205 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 61 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 238.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:57,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 658 Invalid, 507 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [23 Valid, 220 Invalid, 0 Unknown, 264 Unchecked, 238.15ms Time] [2021-11-13 18:52:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-13 18:52:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-11-13 18:52:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.3622047244094488) internal successors, (173), 127 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2021-11-13 18:52:57,212 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 37 [2021-11-13 18:52:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:57,213 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2021-11-13 18:52:57,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:52:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2021-11-13 18:52:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:52:57,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:57,214 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:57,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:57,427 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 373938016, now seen corresponding path program 2 times [2021-11-13 18:52:57,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:57,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428608368] [2021-11-13 18:52:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:57,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:57,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:57,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428608368] [2021-11-13 18:52:57,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428608368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:57,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166183354] [2021-11-13 18:52:57,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:52:57,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:57,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:57,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:52:57,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:52:57,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 18:52:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:52:57,866 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:57,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:52:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-13 18:52:57,926 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 11 treesize of output 7 [2021-11-13 18:52:57,982 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 18:52:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-13 18:52:57,988 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 11 treesize of output 7 [2021-11-13 18:52:57,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:52:57,996 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 31 treesize of output 15 [2021-11-13 18:52:58,073 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-13 18:52:58,074 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 103 [2021-11-13 18:52:58,092 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:52:58,092 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 90 [2021-11-13 18:52:58,102 INFO L354 Elim1Store]: treesize reduction 59, result has 20.3 percent of original size [2021-11-13 18:52:58,102 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 104 treesize of output 68 [2021-11-13 18:52:58,233 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-13 18:52:58,233 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-13 18:52:58,254 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-13 18:52:58,254 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 74 [2021-11-13 18:52:58,267 INFO L354 Elim1Store]: treesize reduction 45, result has 29.7 percent of original size [2021-11-13 18:52:58,267 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 57 treesize of output 64 [2021-11-13 18:52:58,403 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 82 treesize of output 58 [2021-11-13 18:52:58,417 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:52:58,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2021-11-13 18:52:58,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:52:58,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-13 18:52:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:52:58,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:00,840 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| Int) (v_DerPreprocessor_28 Int) (v_DerPreprocessor_29 Int)) (let ((.cse1 (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)))) (let ((.cse0 (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_28)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_29)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))))) (or (= .cse0 3) (= .cse0 1) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))))) is different from false [2021-11-13 18:53:02,979 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~t~0#1.base| Int) (|v_ULTIMATE.start_main_~p~0#1.base_109| Int) (v_DerPreprocessor_28 Int) (v_DerPreprocessor_29 Int) (v_DerPreprocessor_30 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (let ((.cse1 (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse3 v_DerPreprocessor_30)))) (store .cse6 |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select .cse6 |v_ULTIMATE.start_main_~p~0#1.base_109|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))))) (let ((.cse0 (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select .cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse3 |ULTIMATE.start_main_~t~0#1.base|)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_109|) |c_ULTIMATE.start_main_~t~0#1.offset| v_DerPreprocessor_28))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse3 |c_ULTIMATE.start_main_~t~0#1.offset|)))) (store .cse5 |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select .cse5 |v_ULTIMATE.start_main_~p~0#1.base_109|) |c_ULTIMATE.start_main_~t~0#1.offset| v_DerPreprocessor_29))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) (or (= .cse0 3) (= .cse0 1) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))))) is different from false [2021-11-13 18:53:03,066 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-11-13 18:53:03,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17275 treesize of output 16100 [2021-11-13 18:59:43,039 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~t~0#1.base| Int) (|v_ULTIMATE.start_main_~p~0#1.base_109| Int) (v_DerPreprocessor_28 Int) (v_DerPreprocessor_29 Int) (v_DerPreprocessor_31 Int) (v_DerPreprocessor_32 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) (.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse1 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_31) .cse5 |ULTIMATE.start_main_~t~0#1.base|)))) (store .cse7 |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select .cse7 |v_ULTIMATE.start_main_~p~0#1.base_109|) 0 v_DerPreprocessor_28))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6)) (.cse0 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_32) .cse5 0)))) (store .cse4 |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select .cse4 |v_ULTIMATE.start_main_~p~0#1.base_109|) 0 v_DerPreprocessor_29))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (or (and (= |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) (= .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (let ((.cse2 (and (= .cse1 |c_ULTIMATE.start_main_~p~0#1.base|) (= .cse0 |c_ULTIMATE.start_main_~p~0#1.offset|))) (.cse3 (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |v_ULTIMATE.start_main_~p~0#1.base_109| |c_ULTIMATE.start_main_~a~0#1.base|)))) (and (or (= |v_ULTIMATE.start_main_~p~0#1.base_109| .cse1) .cse2 .cse3) (or (= .cse0 0) .cse2 .cse3))))))) is different from false [2021-11-13 18:59:44,280 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 13736 treesize of output 13544 [2021-11-13 18:59:44,835 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 38107 treesize of output 37723 [2021-11-13 18:59:46,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:59:46,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:59:46,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:59:46,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555384674] [2021-11-13 18:59:46,431 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:59:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:59:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:59:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:59:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=674, Unknown=3, NotChecked=162, Total=930 [2021-11-13 18:59:46,433 INFO L87 Difference]: Start difference. First operand 128 states and 173 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:59:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:59:47,122 INFO L93 Difference]: Finished difference Result 146 states and 193 transitions. [2021-11-13 18:59:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:59:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:59:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:59:47,124 INFO L225 Difference]: With dead ends: 146 [2021-11-13 18:59:47,124 INFO L226 Difference]: Without dead ends: 140 [2021-11-13 18:59:47,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=203, Invalid=1366, Unknown=3, NotChecked=234, Total=1806 [2021-11-13 18:59:47,125 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 130 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 279.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:59:47,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 288 Invalid, 324 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [46 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 279.61ms Time] [2021-11-13 18:59:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-13 18:59:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2021-11-13 18:59:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3565891472868217) internal successors, (175), 129 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 18:59:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2021-11-13 18:59:47,134 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 37 [2021-11-13 18:59:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:59:47,135 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2021-11-13 18:59:47,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:59:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2021-11-13 18:59:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:59:47,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:59:47,136 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:59:47,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:59:47,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:59:47,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:59:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:59:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1552822444, now seen corresponding path program 3 times [2021-11-13 18:59:47,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:59:47,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140114368] [2021-11-13 18:59:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:59:47,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:59:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:59:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:59:47,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:59:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140114368] [2021-11-13 18:59:47,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140114368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:59:47,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212133373] [2021-11-13 18:59:47,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:59:47,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:59:47,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:59:47,644 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:59:47,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5befcac0-2fa2-4308-b17b-b7f035ceb730/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:59:47,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:59:47,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:59:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:59:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:59:47,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:59:47,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:59:47,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:59:47,978 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 11 treesize of output 7 [2021-11-13 18:59:48,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:59:48,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 18:59:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:59:48,083 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 19 treesize of output 18 [2021-11-13 18:59:48,169 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:59:48,170 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 38 treesize of output 25 [2021-11-13 18:59:48,262 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-13 18:59:48,262 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 30 treesize of output 32 [2021-11-13 18:59:48,356 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-13 18:59:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 43 [2021-11-13 18:59:52,543 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-13 18:59:52,543 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 30 treesize of output 44 [2021-11-13 18:59:57,149 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:59:57,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-13 18:59:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:59:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:59:58,590 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) is different from false [2021-11-13 19:00:00,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_117| Int) (v_DerPreprocessor_33 Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_33)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 2)))) is different from false [2021-11-13 19:00:02,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_117| Int) (v_DerPreprocessor_33 Int) (|ULTIMATE.start_main_~p~0#1.base| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 2) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_33)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= 3 .cse0) (= 2 .cse0)))) is different from false [2021-11-13 19:00:04,670 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_117| Int) (v_DerPreprocessor_33 Int) (v_DerPreprocessor_34 Int) (|v_ULTIMATE.start_main_~p~0#1.base_119| Int)) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_34)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_119| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_119|) |c_ULTIMATE.start_main_~t~0#1.offset| 2) (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4) v_DerPreprocessor_33))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) is different from false [2021-11-13 19:00:06,694 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_117| Int) (v_DerPreprocessor_33 Int) (v_DerPreprocessor_34 Int) (|v_ULTIMATE.start_main_~p~0#1.base_119| Int) (|ULTIMATE.start_main_~p~0#1.offset| Int)) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 2) (+ |ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_34)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_119| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_119|) 0 2) 4 v_DerPreprocessor_33))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 2)))) is different from false [2021-11-13 19:00:08,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_35 Int) (|v_ULTIMATE.start_main_~p~0#1.base_117| Int) (v_DerPreprocessor_33 Int) (v_DerPreprocessor_34 Int) (|v_ULTIMATE.start_main_~p~0#1.base_119| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_128| Int)) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_35)))) (store .cse3 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse3 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_128| 2) (+ |v_ULTIMATE.start_main_~p~0#1.offset_128| 4) v_DerPreprocessor_34))))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_119| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_119|) 0 2) 4 v_DerPreprocessor_33))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_117|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= 3 .cse0) (= 2 .cse0)))) is different from false [2021-11-13 19:00:09,555 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 88474501365 treesize of output 88273174773