./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX --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 d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:37:20,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:37:20,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:37:20,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:37:20,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:37:20,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:37:20,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:37:20,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:37:20,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:37:20,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:37:20,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:37:20,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:37:20,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:37:20,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:37:20,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:37:20,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:37:20,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:37:20,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:37:20,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:37:20,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:37:20,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:37:20,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:37:20,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:37:20,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:37:20,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:37:20,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:37:20,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:37:20,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:37:20,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:37:20,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:37:20,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:37:20,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:37:20,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:37:20,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:37:20,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:37:20,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:37:20,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:37:20,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:37:20,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:37:20,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:37:20,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:37:20,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:37:20,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:37:20,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:37:20,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:37:20,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:37:20,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:37:20,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:37:20,333 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:37:20,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:37:20,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:37:20,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:37:20,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:37:20,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:37:20,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:37:20,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:37:20,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:37:20,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:37:20,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:37:20,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:37:20,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:37:20,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:37:20,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:37:20,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:37:20,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:37:20,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:37:20,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:37:20,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:37:20,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:37:20,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:37:20,340 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:37:20,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:37:20,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:37:20,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:37:20,343 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_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f [2021-11-09 08:37:20,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:37:20,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:37:20,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:37:20,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:37:20,685 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:37:20,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-11-09 08:37:20,757 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/data/9d800b8f2/27e3b26ccf23401881635d1d89e94faa/FLAGcb952a853 [2021-11-09 08:37:21,376 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:37:21,377 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/sv-benchmarks/c/loop-simple/nested_2.c [2021-11-09 08:37:21,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/data/9d800b8f2/27e3b26ccf23401881635d1d89e94faa/FLAGcb952a853 [2021-11-09 08:37:21,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/data/9d800b8f2/27e3b26ccf23401881635d1d89e94faa [2021-11-09 08:37:21,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:37:21,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:37:21,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:37:21,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:37:21,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:37:21,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:37:21" (1/1) ... [2021-11-09 08:37:21,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12cffc94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:21, skipping insertion in model container [2021-11-09 08:37:21,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:37:21" (1/1) ... [2021-11-09 08:37:21,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:37:21,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:37:21,951 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_942107e7-581a-431a-8866-63129c5b8d44/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-09 08:37:21,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:37:21,979 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:37:21,993 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_942107e7-581a-431a-8866-63129c5b8d44/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-09 08:37:21,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:37:22,009 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:37:22,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22 WrapperNode [2021-11-09 08:37:22,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:37:22,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:37:22,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:37:22,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:37:22,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:37:22,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:37:22,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:37:22,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:37:22,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:37:22,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:37:22,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:37:22,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:37:22,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (1/1) ... [2021-11-09 08:37:22,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:37:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:22,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:37:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:37:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:37:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:37:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:37:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:37:22,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:37:22,475 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-09 08:37:22,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:37:22 BoogieIcfgContainer [2021-11-09 08:37:22,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:37:22,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:37:22,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:37:22,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:37:22,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:37:21" (1/3) ... [2021-11-09 08:37:22,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623d4b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:37:22, skipping insertion in model container [2021-11-09 08:37:22,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:37:22" (2/3) ... [2021-11-09 08:37:22,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623d4b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:37:22, skipping insertion in model container [2021-11-09 08:37:22,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:37:22" (3/3) ... [2021-11-09 08:37:22,501 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-11-09 08:37:22,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:37:22,508 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:37:22,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:37:22,574 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 [2021-11-09 08:37:22,576 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:37:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-09 08:37:22,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:22,615 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-09 08:37:22,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2021-11-09 08:37:22,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:22,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419870298] [2021-11-09 08:37:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:22,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:22,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:22,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419870298] [2021-11-09 08:37:22,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419870298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:22,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:22,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:22,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124889384] [2021-11-09 08:37:22,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:22,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:22,987 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:23,042 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-11-09 08:37:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-09 08:37:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:23,055 INFO L225 Difference]: With dead ends: 28 [2021-11-09 08:37:23,055 INFO L226 Difference]: Without dead ends: 13 [2021-11-09 08:37:23,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-09 08:37:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2021-11-09 08:37:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-09 08:37:23,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2021-11-09 08:37:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:23,100 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-09 08:37:23,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-09 08:37:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 08:37:23,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:23,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:37:23,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2021-11-09 08:37:23,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:23,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860528376] [2021-11-09 08:37:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:23,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:23,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860528376] [2021-11-09 08:37:23,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860528376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:23,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:23,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:23,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852772706] [2021-11-09 08:37:23,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:23,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:23,231 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:23,264 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-09 08:37:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-09 08:37:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:23,266 INFO L225 Difference]: With dead ends: 19 [2021-11-09 08:37:23,266 INFO L226 Difference]: Without dead ends: 12 [2021-11-09 08:37:23,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-09 08:37:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-09 08:37:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-09 08:37:23,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-09 08:37:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:23,276 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-09 08:37:23,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-09 08:37:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:37:23,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:23,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:23,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:37:23,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2021-11-09 08:37:23,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:23,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427780644] [2021-11-09 08:37:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:23,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:23,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427780644] [2021-11-09 08:37:23,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427780644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:23,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188947590] [2021-11-09 08:37:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:23,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:23,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:23,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:37:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:37:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:23,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188947590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:23,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:23,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:37:23,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666397328] [2021-11-09 08:37:23,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:37:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:23,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:37:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:37:23,520 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:23,555 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-09 08:37:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 10 [2021-11-09 08:37:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:23,559 INFO L225 Difference]: With dead ends: 22 [2021-11-09 08:37:23,560 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 08:37:23,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:37:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 08:37:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-09 08:37:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-09 08:37:23,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-11-09 08:37:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:23,568 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-09 08:37:23,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-09 08:37:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:37:23,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:23,570 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:23,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:23,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:23,782 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:23,783 INFO L85 PathProgramCache]: Analyzing trace with hash 147832950, now seen corresponding path program 2 times [2021-11-09 08:37:23,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:23,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054167260] [2021-11-09 08:37:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:37:23,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:23,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054167260] [2021-11-09 08:37:23,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054167260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:23,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303404103] [2021-11-09 08:37:23,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:37:23,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:23,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:23,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:37:23,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:37:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:23,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:37:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:24,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303404103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:24,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:24,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-09 08:37:24,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682731605] [2021-11-09 08:37:24,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:24,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:24,095 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:24,275 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-09 08:37:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:37:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:37:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:24,279 INFO L225 Difference]: With dead ends: 45 [2021-11-09 08:37:24,279 INFO L226 Difference]: Without dead ends: 35 [2021-11-09 08:37:24,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:37:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-09 08:37:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2021-11-09 08:37:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-09 08:37:24,298 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2021-11-09 08:37:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:24,298 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-09 08:37:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-09 08:37:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:37:24,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:24,303 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-09 08:37:24,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:24,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:24,529 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1657769242, now seen corresponding path program 3 times [2021-11-09 08:37:24,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:24,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255182460] [2021-11-09 08:37:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:24,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:24,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:24,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255182460] [2021-11-09 08:37:24,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255182460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:24,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006528356] [2021-11-09 08:37:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:24,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:24,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:24,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:37:24,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 08:37:24,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:24,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:37:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:37:24,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006528356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:24,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:24,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:37:24,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390279504] [2021-11-09 08:37:24,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:24,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:24,849 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:24,897 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-09 08:37:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:37:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 08:37:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:24,902 INFO L225 Difference]: With dead ends: 44 [2021-11-09 08:37:24,902 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 08:37:24,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 08:37:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-09 08:37:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-09 08:37:24,918 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2021-11-09 08:37:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:24,919 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-09 08:37:24,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-09 08:37:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:37:24,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:24,920 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-09 08:37:24,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:25,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:25,123 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:25,123 INFO L85 PathProgramCache]: Analyzing trace with hash 953965478, now seen corresponding path program 4 times [2021-11-09 08:37:25,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:25,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132800919] [2021-11-09 08:37:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:25,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:37:25,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:25,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132800919] [2021-11-09 08:37:25,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132800919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:25,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643637601] [2021-11-09 08:37:25,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:37:25,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:25,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:25,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:37:25,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:37:25,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:25,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:37:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:37:25,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643637601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:25,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:25,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 08:37:25,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138424962] [2021-11-09 08:37:25,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:37:25,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:37:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:37:25,406 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:25,452 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-09 08:37:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:37:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 08:37:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:25,453 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:37:25,453 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 08:37:25,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:37:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 08:37:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-09 08:37:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-11-09 08:37:25,460 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2021-11-09 08:37:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:25,460 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-11-09 08:37:25,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-11-09 08:37:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:37:25,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:25,462 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-09 08:37:25,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:25,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:25,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1188152166, now seen corresponding path program 5 times [2021-11-09 08:37:25,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:25,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601624770] [2021-11-09 08:37:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:25,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:37:25,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:25,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601624770] [2021-11-09 08:37:25,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601624770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:25,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794021147] [2021-11-09 08:37:25,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:37:25,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:25,778 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:25,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:37:25,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 08:37:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:37:25,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:37:25,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794021147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:25,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:25,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 08:37:25,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989729120] [2021-11-09 08:37:25,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:37:25,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:37:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:37:25,986 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:26,033 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-09 08:37:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:37:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2021-11-09 08:37:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:26,035 INFO L225 Difference]: With dead ends: 54 [2021-11-09 08:37:26,035 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 08:37:26,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:37:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 08:37:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-09 08:37:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-09 08:37:26,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-11-09 08:37:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:26,063 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-09 08:37:26,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-09 08:37:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:37:26,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:26,065 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-09 08:37:26,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:26,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:26,297 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash 750610982, now seen corresponding path program 6 times [2021-11-09 08:37:26,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:26,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142919919] [2021-11-09 08:37:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:26,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-09 08:37:26,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:26,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142919919] [2021-11-09 08:37:26,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142919919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:26,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602873187] [2021-11-09 08:37:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:37:26,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:26,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:26,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:37:26,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:37:26,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:37:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-09 08:37:26,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602873187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:26,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:26,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 08:37:26,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664621880] [2021-11-09 08:37:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:37:26,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:37:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:26,649 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-11-09 08:37:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:26,671 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-11-09 08:37:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:37:26,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 35 [2021-11-09 08:37:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:26,673 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:37:26,674 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 08:37:26,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 08:37:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-11-09 08:37:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-11-09 08:37:26,684 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 35 [2021-11-09 08:37:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:26,684 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-11-09 08:37:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-11-09 08:37:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-11-09 08:37:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:37:26,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:26,687 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-09 08:37:26,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:26,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:26,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1549796206, now seen corresponding path program 7 times [2021-11-09 08:37:26,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:26,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060330993] [2021-11-09 08:37:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:26,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-09 08:37:27,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:27,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060330993] [2021-11-09 08:37:27,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060330993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:27,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84348149] [2021-11-09 08:37:27,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:37:27,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:27,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:27,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:27,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:37:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:37:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-09 08:37:27,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84348149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:27,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:27,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:37:27,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479895563] [2021-11-09 08:37:27,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:27,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:27,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:27,323 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:27,372 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-11-09 08:37:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:37:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 50 [2021-11-09 08:37:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:27,377 INFO L225 Difference]: With dead ends: 83 [2021-11-09 08:37:27,377 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 08:37:27,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 08:37:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-11-09 08:37:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-09 08:37:27,400 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 50 [2021-11-09 08:37:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:27,403 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-09 08:37:27,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-09 08:37:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 08:37:27,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:27,404 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-09 08:37:27,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:27,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:27,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:27,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1394520358, now seen corresponding path program 8 times [2021-11-09 08:37:27,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:27,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43724073] [2021-11-09 08:37:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:27,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-09 08:37:27,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:27,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43724073] [2021-11-09 08:37:27,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43724073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:27,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628584140] [2021-11-09 08:37:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:37:27,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:27,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:27,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:37:27,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:37:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:37:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-09 08:37:28,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628584140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:28,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:28,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 08:37:28,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476466360] [2021-11-09 08:37:28,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:37:28,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:37:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:37:28,068 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:28,102 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-11-09 08:37:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:37:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 08:37:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:28,104 INFO L225 Difference]: With dead ends: 98 [2021-11-09 08:37:28,105 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 08:37:28,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:37:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 08:37:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2021-11-09 08:37:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.075) internal successors, (86), 80 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-11-09 08:37:28,116 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 65 [2021-11-09 08:37:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:28,116 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-11-09 08:37:28,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-11-09 08:37:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 08:37:28,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:28,118 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-09 08:37:28,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:28,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:37:28,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash -60302226, now seen corresponding path program 9 times [2021-11-09 08:37:28,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:28,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108704347] [2021-11-09 08:37:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:28,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-09 08:37:28,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:28,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108704347] [2021-11-09 08:37:28,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108704347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:28,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148350666] [2021-11-09 08:37:28,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:28,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:28,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:28,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:37:28,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 08:37:28,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:28,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:37:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-11-09 08:37:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148350666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:28,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:28,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-09 08:37:28,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047983036] [2021-11-09 08:37:28,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:37:28,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:37:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:37:28,950 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:28,979 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-11-09 08:37:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:37:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 08:37:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:28,980 INFO L225 Difference]: With dead ends: 81 [2021-11-09 08:37:28,980 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 08:37:28,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:37:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 08:37:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 08:37:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 08:37:28,982 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-11-09 08:37:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:28,983 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 08:37:28,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 08:37:28,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 08:37:28,986 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:37:29,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:29,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:29,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 08:37:29,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:37:29,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:37:29,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:37:29,373 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-09 08:37:29,373 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 25 27) no Hoare annotation was computed. [2021-11-09 08:37:29,373 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2021-11-09 08:37:29,374 INFO L853 garLoopResultBuilder]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (< ULTIMATE.start_main_~b~0 7) (<= ULTIMATE.start_main_~a~0 5)) [2021-11-09 08:37:29,374 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-09 08:37:29,374 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-09 08:37:29,374 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-09 08:37:29,374 INFO L860 garLoopResultBuilder]: At program point L28(lines 15 29) the Hoare annotation is: true [2021-11-09 08:37:29,375 INFO L857 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-09 08:37:29,375 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2021-11-09 08:37:29,375 INFO L857 garLoopResultBuilder]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2021-11-09 08:37:29,375 INFO L853 garLoopResultBuilder]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~b~0) (< ULTIMATE.start_main_~b~0 7)) [2021-11-09 08:37:29,376 INFO L857 garLoopResultBuilder]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2021-11-09 08:37:29,379 INFO L731 BasicCegarLoop]: Path program histogram: [9, 1, 1] [2021-11-09 08:37:29,381 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 08:37:29,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 08:37:29 BoogieIcfgContainer [2021-11-09 08:37:29,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 08:37:29,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:37:29,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:37:29,397 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:37:29,398 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:37:22" (3/4) ... [2021-11-09 08:37:29,401 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-09 08:37:29,413 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-09 08:37:29,413 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-09 08:37:29,414 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 08:37:29,414 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 08:37:29,447 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 08:37:29,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:37:29,449 INFO L168 Benchmark]: Toolchain (without parser) took 7719.35 ms. Allocated memory was 130.0 MB in the beginning and 176.2 MB in the end (delta: 46.1 MB). Free memory was 91.4 MB in the beginning and 120.1 MB in the end (delta: -28.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:37:29,449 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 130.0 MB. Free memory was 107.6 MB in the beginning and 107.5 MB in the end (delta: 134.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:37:29,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.34 ms. Allocated memory is still 130.0 MB. Free memory was 91.2 MB in the beginning and 105.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:37:29,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.68 ms. Allocated memory is still 130.0 MB. Free memory was 105.5 MB in the beginning and 104.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:37:29,451 INFO L168 Benchmark]: Boogie Preprocessor took 22.20 ms. Allocated memory is still 130.0 MB. Free memory was 104.0 MB in the beginning and 103.5 MB in the end (delta: 563.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:37:29,451 INFO L168 Benchmark]: RCFGBuilder took 416.67 ms. Allocated memory is still 130.0 MB. Free memory was 103.0 MB in the beginning and 94.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:37:29,452 INFO L168 Benchmark]: TraceAbstraction took 6903.49 ms. Allocated memory was 130.0 MB in the beginning and 176.2 MB in the end (delta: 46.1 MB). Free memory was 93.5 MB in the beginning and 122.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-11-09 08:37:29,452 INFO L168 Benchmark]: Witness Printer took 50.67 ms. Allocated memory is still 176.2 MB. Free memory was 122.1 MB in the beginning and 120.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:37:29,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 130.0 MB. Free memory was 107.6 MB in the beginning and 107.5 MB in the end (delta: 134.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.34 ms. Allocated memory is still 130.0 MB. Free memory was 91.2 MB in the beginning and 105.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.68 ms. Allocated memory is still 130.0 MB. Free memory was 105.5 MB in the beginning and 104.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.20 ms. Allocated memory is still 130.0 MB. Free memory was 104.0 MB in the beginning and 103.5 MB in the end (delta: 563.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 416.67 ms. Allocated memory is still 130.0 MB. Free memory was 103.0 MB in the beginning and 94.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6903.49 ms. Allocated memory was 130.0 MB in the beginning and 176.2 MB in the end (delta: 46.1 MB). Free memory was 93.5 MB in the beginning and 122.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * Witness Printer took 50.67 ms. Allocated memory is still 176.2 MB. Free memory was 122.1 MB in the beginning and 120.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 26]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 11, TraceHistogramMax: 30, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 97 SDslu, 118 SDs, 0 SdLazy, 183 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 393 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=10, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 18 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1567 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 679 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 1577 SizeOfPredicates, 2 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2269/5009 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: b < 7 && a <= 5 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (a <= 6 && 6 <= b) && b < 7 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-09 08:37:29,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942107e7-581a-431a-8866-63129c5b8d44/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE