./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array18_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array18_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:55:05,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:55:05,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:55:05,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:55:05,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:55:05,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:55:05,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:55:05,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:55:05,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:55:05,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:55:05,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:55:05,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:55:05,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:55:05,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:55:05,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:55:05,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:55:05,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:55:05,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:55:05,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:55:05,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:55:05,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:55:05,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:55:05,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:55:05,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:55:05,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:55:05,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:55:05,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:55:05,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:55:05,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:55:05,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:55:05,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:55:05,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:55:05,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:55:05,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:55:05,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:55:05,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:55:05,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:55:05,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:55:05,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:55:05,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:55:05,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:55:05,380 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:55:05,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:55:05,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:55:05,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:55:05,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:55:05,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:55:05,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:55:05,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:55:05,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:55:05,424 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:55:05,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:55:05,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:55:05,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:55:05,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:55:05,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:55:05,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:55:05,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:55:05,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:55:05,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:55:05,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:55:05,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:55:05,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:55:05,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:55:05,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:55:05,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:55:05,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:55:05,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:55:05,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:55:05,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:55:05,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:55:05,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:55:05,428 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:55:05,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:55:05,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:55:05,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:55:05,429 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_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 [2021-11-20 05:55:05,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:55:05,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:55:05,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:55:05,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:55:05,692 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:55:05,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array18_pattern.c [2021-11-20 05:55:05,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/77f2ac49c/b5069bb20dc646b3ade82889603fb83c/FLAGbd3938860 [2021-11-20 05:55:06,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:55:06,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/sv-benchmarks/c/array-patterns/array18_pattern.c [2021-11-20 05:55:06,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/77f2ac49c/b5069bb20dc646b3ade82889603fb83c/FLAGbd3938860 [2021-11-20 05:55:06,627 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/77f2ac49c/b5069bb20dc646b3ade82889603fb83c [2021-11-20 05:55:06,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:55:06,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:55:06,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:55:06,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:55:06,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:55:06,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a0cdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06, skipping insertion in model container [2021-11-20 05:55:06,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:55:06,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:55:06,823 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2021-11-20 05:55:06,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:55:06,855 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:55:06,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2021-11-20 05:55:06,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:55:06,891 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:55:06,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06 WrapperNode [2021-11-20 05:55:06,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:55:06,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:55:06,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:55:06,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:55:06,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,931 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-11-20 05:55:06,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:55:06,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:55:06,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:55:06,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:55:06,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:55:06,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:55:06,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:55:06,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:55:06,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (1/1) ... [2021-11-20 05:55:06,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:55:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:06,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:55:07,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:55:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:55:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:55:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:55:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:55:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:55:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:55:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:55:07,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:55:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:55:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:55:07,105 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:55:07,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:55:07,297 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:55:07,302 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:55:07,303 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 05:55:07,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:55:07 BoogieIcfgContainer [2021-11-20 05:55:07,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:55:07,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:55:07,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:55:07,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:55:07,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:55:06" (1/3) ... [2021-11-20 05:55:07,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642ff628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:55:07, skipping insertion in model container [2021-11-20 05:55:07,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:06" (2/3) ... [2021-11-20 05:55:07,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642ff628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:55:07, skipping insertion in model container [2021-11-20 05:55:07,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:55:07" (3/3) ... [2021-11-20 05:55:07,343 INFO L111 eAbstractionObserver]: Analyzing ICFG array18_pattern.c [2021-11-20 05:55:07,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:55:07,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:55:07,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:55:07,452 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:55:07,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:55:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:55:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:55:07,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:07,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:07,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2021-11-20 05:55:07,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:07,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131048422] [2021-11-20 05:55:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:07,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:07,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:55:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:07,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131048422] [2021-11-20 05:55:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131048422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:07,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:07,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:55:07,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967553059] [2021-11-20 05:55:07,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:07,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:55:07,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:55:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:55:07,770 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:55:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:07,823 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2021-11-20 05:55:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:55:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 05:55:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:07,833 INFO L225 Difference]: With dead ends: 63 [2021-11-20 05:55:07,833 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 05:55:07,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:55:07,840 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:07,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:55:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 05:55:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 05:55:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:55:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-11-20 05:55:07,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2021-11-20 05:55:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-11-20 05:55:07,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:55:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-11-20 05:55:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:55:07,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:07,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:07,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:55:07,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:07,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2021-11-20 05:55:07,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:07,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826554001] [2021-11-20 05:55:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:07,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:07,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:07,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110197119] [2021-11-20 05:55:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:07,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:07,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:07,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:55:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:55:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:55:08,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:08,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826554001] [2021-11-20 05:55:08,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:08,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110197119] [2021-11-20 05:55:08,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110197119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:08,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:08,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:08,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408199192] [2021-11-20 05:55:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:08,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:08,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:08,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:08,173 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:08,199 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-20 05:55:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-20 05:55:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:08,201 INFO L225 Difference]: With dead ends: 36 [2021-11-20 05:55:08,201 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 05:55:08,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:08,204 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:08,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:55:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 05:55:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 05:55:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:55:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-11-20 05:55:08,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2021-11-20 05:55:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:08,214 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-11-20 05:55:08,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-11-20 05:55:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:55:08,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:08,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:08,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:08,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:08,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2021-11-20 05:55:08,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:08,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810387903] [2021-11-20 05:55:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:08,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:08,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:08,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794701129] [2021-11-20 05:55:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:08,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:08,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:08,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:08,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:55:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:55:08,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:55:08,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:08,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810387903] [2021-11-20 05:55:08,687 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:08,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794701129] [2021-11-20 05:55:08,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794701129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:08,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:08,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:55:08,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102849117] [2021-11-20 05:55:08,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:08,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:55:08,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:55:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:08,691 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:08,803 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2021-11-20 05:55:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:55:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-20 05:55:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:08,807 INFO L225 Difference]: With dead ends: 67 [2021-11-20 05:55:08,807 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 05:55:08,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:55:08,812 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:08,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 05:55:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-11-20 05:55:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:55:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-20 05:55:08,834 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2021-11-20 05:55:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:08,834 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-20 05:55:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-20 05:55:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:55:08,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:08,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:08,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:09,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:09,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2021-11-20 05:55:09,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:09,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134871944] [2021-11-20 05:55:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:09,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:09,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944224305] [2021-11-20 05:55:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:09,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:09,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:55:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:55:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:55:09,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:09,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134871944] [2021-11-20 05:55:09,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944224305] [2021-11-20 05:55:09,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944224305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:09,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:09,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:09,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90523132] [2021-11-20 05:55:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:09,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:09,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:09,249 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:09,310 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-11-20 05:55:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2021-11-20 05:55:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:09,312 INFO L225 Difference]: With dead ends: 64 [2021-11-20 05:55:09,312 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 05:55:09,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:09,317 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:09,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:55:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 05:55:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-20 05:55:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:55:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-20 05:55:09,335 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 38 [2021-11-20 05:55:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-20 05:55:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-20 05:55:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 05:55:09,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:09,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:09,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:09,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:09,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2021-11-20 05:55:09,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:09,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306700468] [2021-11-20 05:55:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:09,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:09,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371177019] [2021-11-20 05:55:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:09,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:09,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:09,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:09,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:55:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:55:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:10,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-20 05:55:10,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 05:55:10,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 05:55:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-20 05:55:10,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:55:10,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 05:55:10,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:55:10,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:55:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 05:55:10,988 INFO L354 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2021-11-20 05:55:10,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 35 [2021-11-20 05:55:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:55:11,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:11,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:55:11,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 196 treesize of output 196 [2021-11-20 05:55:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 4 [2021-11-20 05:55:11,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 4 [2021-11-20 05:55:11,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 4 [2021-11-20 05:55:11,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 4 [2021-11-20 05:55:11,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 4 [2021-11-20 05:55:11,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 4 [2021-11-20 05:55:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 4 [2021-11-20 05:55:11,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 4 [2021-11-20 05:55:12,126 INFO L354 Elim1Store]: treesize reduction 198, result has 50.6 percent of original size [2021-11-20 05:55:12,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 278 [2021-11-20 05:55:35,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:35,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306700468] [2021-11-20 05:55:35,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371177019] [2021-11-20 05:55:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371177019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:35,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:55:35,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 05:55:35,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812040447] [2021-11-20 05:55:35,602 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:35,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:55:35,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:55:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=545, Unknown=2, NotChecked=0, Total=650 [2021-11-20 05:55:35,604 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:37,343 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2021-11-20 05:55:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:55:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2021-11-20 05:55:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:37,348 INFO L225 Difference]: With dead ends: 113 [2021-11-20 05:55:37,348 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 05:55:37,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=332, Invalid=1472, Unknown=2, NotChecked=0, Total=1806 [2021-11-20 05:55:37,351 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:37,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 159 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 278 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2021-11-20 05:55:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 05:55:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2021-11-20 05:55:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:55:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-11-20 05:55:37,385 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 40 [2021-11-20 05:55:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:37,387 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-11-20 05:55:37,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:55:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-11-20 05:55:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 05:55:37,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:37,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:37,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:37,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:37,590 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1287607751, now seen corresponding path program 1 times [2021-11-20 05:55:37,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014512558] [2021-11-20 05:55:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:37,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:37,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820734356] [2021-11-20 05:55:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:37,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:37,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:37,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:37,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:55:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:55:37,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:38,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:55:38,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014512558] [2021-11-20 05:55:38,746 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820734356] [2021-11-20 05:55:38,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820734356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:38,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:38,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-11-20 05:55:38,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946965332] [2021-11-20 05:55:38,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:38,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:55:38,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:55:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:55:38,760 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 05:55:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:39,753 INFO L93 Difference]: Finished difference Result 162 states and 196 transitions. [2021-11-20 05:55:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:55:39,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2021-11-20 05:55:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:39,758 INFO L225 Difference]: With dead ends: 162 [2021-11-20 05:55:39,758 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 05:55:39,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:55:39,761 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:39,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 193 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:55:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 05:55:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 66. [2021-11-20 05:55:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 57 states have internal predecessors, (68), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:55:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-20 05:55:39,774 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 40 [2021-11-20 05:55:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:39,774 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-20 05:55:39,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 05:55:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-20 05:55:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:55:39,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:39,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:39,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:39,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:55:39,993 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2021-11-20 05:55:39,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:39,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643427845] [2021-11-20 05:55:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:39,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:40,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:40,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139560758] [2021-11-20 05:55:40,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:55:40,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:40,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:40,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:40,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:55:40,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:55:40,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:55:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:55:40,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:55:40,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643427845] [2021-11-20 05:55:40,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139560758] [2021-11-20 05:55:40,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139560758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:40,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:40,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 05:55:40,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806900247] [2021-11-20 05:55:40,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:40,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:55:40,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:55:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:55:40,456 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:55:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:40,735 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2021-11-20 05:55:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:55:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-20 05:55:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:40,737 INFO L225 Difference]: With dead ends: 139 [2021-11-20 05:55:40,737 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 05:55:40,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:55:40,738 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 147 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:40,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 129 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:55:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 05:55:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2021-11-20 05:55:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:55:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-11-20 05:55:40,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 42 [2021-11-20 05:55:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:40,752 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-11-20 05:55:40,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:55:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-11-20 05:55:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:55:40,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:40,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:40,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:40,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:40,969 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2021-11-20 05:55:40,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:40,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536052009] [2021-11-20 05:55:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:40,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:40,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118993509] [2021-11-20 05:55:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:55:40,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:40,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:40,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:40,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:55:41,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:55:41,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:41,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:55:41,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:41,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-20 05:55:41,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 05:55:41,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 05:55:41,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 05:55:41,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 05:55:41,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-20 05:55:41,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 05:55:41,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 05:55:41,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 05:55:41,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 05:55:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 05:55:41,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 05:55:59,135 WARN L227 SmtUtils]: Spent 16.11s on a formula simplification. DAG size of input: 96 DAG size of output: 61 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:55:59,137 INFO L354 Elim1Store]: treesize reduction 452, result has 26.0 percent of original size [2021-11-20 05:55:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 209 treesize of output 245 [2021-11-20 05:57:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:57:43,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:44,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:57:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 196 treesize of output 196 [2021-11-20 05:57:44,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 4 [2021-11-20 05:57:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 4 [2021-11-20 05:57:44,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 4 [2021-11-20 05:57:44,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:57:44,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 82 [2021-11-20 05:57:44,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:57:44,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 98 [2021-11-20 05:57:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:57:47,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:47,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536052009] [2021-11-20 05:57:47,998 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:57:47,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118993509] [2021-11-20 05:57:47,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118993509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:47,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:47,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-11-20 05:57:47,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731417495] [2021-11-20 05:57:47,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:47,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:57:47,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:47,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:57:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=547, Unknown=2, NotChecked=0, Total=650 [2021-11-20 05:57:48,000 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:57:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:56,553 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2021-11-20 05:57:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:57:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-11-20 05:57:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:56,556 INFO L225 Difference]: With dead ends: 99 [2021-11-20 05:57:56,556 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 05:57:56,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=250, Invalid=1307, Unknown=3, NotChecked=0, Total=1560 [2021-11-20 05:57:56,558 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:56,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 196 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 221 Invalid, 0 Unknown, 162 Unchecked, 1.2s Time] [2021-11-20 05:57:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 05:57:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2021-11-20 05:57:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 72 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:57:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-11-20 05:57:56,578 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 42 [2021-11-20 05:57:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:56,578 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-11-20 05:57:56,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:57:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-11-20 05:57:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:57:56,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:56,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:56,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:56,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:57:56,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1406472713, now seen corresponding path program 2 times [2021-11-20 05:57:56,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:56,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69555271] [2021-11-20 05:57:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:56,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:56,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:57:56,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920784832] [2021-11-20 05:57:56,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:57:56,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:56,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:56,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:56,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:57:56,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:57:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:56,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:57:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:57:57,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:57:57,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69555271] [2021-11-20 05:57:57,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:57:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920784832] [2021-11-20 05:57:57,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920784832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:57,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:57,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 05:57:57,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832469534] [2021-11-20 05:57:57,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:57,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:57:57,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:57:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:57:57,274 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:57:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:57,625 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2021-11-20 05:57:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:57:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-20 05:57:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:57,630 INFO L225 Difference]: With dead ends: 152 [2021-11-20 05:57:57,630 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 05:57:57,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:57:57,631 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:57,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 114 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:57:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 05:57:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2021-11-20 05:57:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 86 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:57:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2021-11-20 05:57:57,651 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 42 [2021-11-20 05:57:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:57,651 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2021-11-20 05:57:57,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:57:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2021-11-20 05:57:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:57:57,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:57,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:57,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:57,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:57,861 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:57,861 INFO L85 PathProgramCache]: Analyzing trace with hash 822903975, now seen corresponding path program 4 times [2021-11-20 05:57:57,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:57,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240208895] [2021-11-20 05:57:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:57,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:57,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:57:57,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973812578] [2021-11-20 05:57:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:57:57,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:57,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:57,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:57,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:57:57,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:57:57,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:57:57,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:57:58,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:57:58,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240208895] [2021-11-20 05:57:58,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:57:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973812578] [2021-11-20 05:57:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973812578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:58,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 05:57:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002926641] [2021-11-20 05:57:58,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:57:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:57:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:57:58,314 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:57:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:58,677 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-11-20 05:57:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:57:58,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-20 05:57:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:58,679 INFO L225 Difference]: With dead ends: 114 [2021-11-20 05:57:58,679 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 05:57:58,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:57:58,681 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:58,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 105 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:57:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 05:57:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-11-20 05:57:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:57:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-20 05:57:58,696 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 45 [2021-11-20 05:57:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:58,696 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-20 05:57:58,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:57:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-20 05:57:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 05:57:58,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:58,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:58,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 05:57:58,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:58,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1727010197, now seen corresponding path program 3 times [2021-11-20 05:57:58,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677524482] [2021-11-20 05:57:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:58,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:58,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:57:58,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824936102] [2021-11-20 05:57:58,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:57:58,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:58,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:58,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:58,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:57:58,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:57:58,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:57:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:57:59,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 05:57:59,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677524482] [2021-11-20 05:57:59,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:57:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824936102] [2021-11-20 05:57:59,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824936102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:59,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:59,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-20 05:57:59,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992565008] [2021-11-20 05:57:59,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:59,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:57:59,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:59,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:57:59,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:57:59,965 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:58:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:00,766 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-11-20 05:58:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:58:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2021-11-20 05:58:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:00,768 INFO L225 Difference]: With dead ends: 127 [2021-11-20 05:58:00,769 INFO L226 Difference]: Without dead ends: 123 [2021-11-20 05:58:00,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:58:00,770 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:00,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:58:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-20 05:58:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 64. [2021-11-20 05:58:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:58:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-11-20 05:58:00,781 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 49 [2021-11-20 05:58:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:00,782 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-11-20 05:58:00,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:58:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-11-20 05:58:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:58:00,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:00,783 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:00,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:00,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:00,996 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 538416053, now seen corresponding path program 5 times [2021-11-20 05:58:00,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:00,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429407523] [2021-11-20 05:58:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:00,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:01,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:58:01,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662643861] [2021-11-20 05:58:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:58:01,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:01,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:01,007 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:01,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:58:01,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 05:58:01,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:58:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:58:01,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 05:58:01,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429407523] [2021-11-20 05:58:01,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:58:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662643861] [2021-11-20 05:58:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662643861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:01,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:58:01,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 05:58:01,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434040448] [2021-11-20 05:58:01,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:58:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:58:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:58:01,554 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:58:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:01,891 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-11-20 05:58:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:58:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2021-11-20 05:58:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:01,893 INFO L225 Difference]: With dead ends: 71 [2021-11-20 05:58:01,893 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 05:58:01,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:58:01,894 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:01,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 85 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:58:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 05:58:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-11-20 05:58:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:58:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-20 05:58:01,905 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2021-11-20 05:58:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:01,906 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-20 05:58:01,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:58:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-20 05:58:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:58:01,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:01,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:01,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:02,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:02,121 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1673343477, now seen corresponding path program 6 times [2021-11-20 05:58:02,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:02,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818141507] [2021-11-20 05:58:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:02,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:02,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:58:02,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183162576] [2021-11-20 05:58:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:58:02,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:02,131 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:58:02,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 05:58:02,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 05:58:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:02,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 05:58:02,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 05:58:03,173 INFO L354 Elim1Store]: treesize reduction 140, result has 20.0 percent of original size [2021-11-20 05:58:03,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 95 [2021-11-20 05:58:03,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:58:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:03,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 24 [2021-11-20 05:58:03,856 INFO L354 Elim1Store]: treesize reduction 196, result has 15.9 percent of original size [2021-11-20 05:58:03,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 108 [2021-11-20 05:58:03,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:58:03,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:03,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:03,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 25 [2021-11-20 05:58:04,358 INFO L354 Elim1Store]: treesize reduction 284, result has 18.2 percent of original size [2021-11-20 05:58:04,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 89 treesize of output 127 [2021-11-20 05:58:04,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:04,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:04,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:04,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:04,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:04,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 34 [2021-11-20 05:58:34,010 INFO L354 Elim1Store]: treesize reduction 471, result has 23.0 percent of original size [2021-11-20 05:58:34,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 113 treesize of output 218 [2021-11-20 05:58:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:34,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:58:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 74 [2021-11-20 05:58:47,409 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 227 DAG size of output: 90 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:58:47,410 INFO L354 Elim1Store]: treesize reduction 1596, result has 19.4 percent of original size [2021-11-20 05:58:47,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 543 treesize of output 635 [2021-11-20 05:58:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:48,584 INFO L244 Elim1Store]: Index analysis took 149 ms [2021-11-20 05:58:48,741 INFO L354 Elim1Store]: treesize reduction 40, result has 48.7 percent of original size [2021-11-20 05:58:48,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 229 treesize of output 195 [2021-11-20 05:58:48,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:58:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,410 INFO L244 Elim1Store]: Index analysis took 109 ms [2021-11-20 05:58:49,423 INFO L354 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2021-11-20 05:58:49,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 211 [2021-11-20 05:58:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:49,874 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-20 05:58:49,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 449 treesize of output 245 [2021-11-20 06:04:31,021 INFO L354 Elim1Store]: treesize reduction 1183, result has 19.6 percent of original size [2021-11-20 06:04:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 365 treesize of output 460 [2021-11-20 06:06:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:06:00,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:08,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:08,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818141507] [2021-11-20 06:07:08,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:08,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183162576] [2021-11-20 06:07:08,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183162576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:08,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:07:08,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-11-20 06:07:08,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874266368] [2021-11-20 06:07:08,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:08,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:07:08,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:07:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2649, Unknown=43, NotChecked=0, Total=3080 [2021-11-20 06:07:08,232 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 37 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 36 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:07:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:11,148 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-11-20 06:07:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:07:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 36 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-11-20 06:07:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:11,150 INFO L225 Difference]: With dead ends: 98 [2021-11-20 06:07:11,150 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 06:07:11,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 140.2s TimeCoverageRelationStatistics Valid=413, Invalid=2849, Unknown=44, NotChecked=0, Total=3306 [2021-11-20 06:07:11,152 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:11,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 418 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 360 Unchecked, 0.1s Time] [2021-11-20 06:07:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 06:07:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-20 06:07:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:07:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-11-20 06:07:11,174 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 58 [2021-11-20 06:07:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:11,175 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-11-20 06:07:11,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 36 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:07:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-11-20 06:07:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:07:11,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:11,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:11,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:11,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:07:11,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1539329971, now seen corresponding path program 1 times [2021-11-20 06:07:11,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:11,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517822040] [2021-11-20 06:07:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:11,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:11,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:11,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184428748] [2021-11-20 06:07:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:11,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:11,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:11,425 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:11,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:07:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:07:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 06:07:11,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:11,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517822040] [2021-11-20 06:07:11,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184428748] [2021-11-20 06:07:11,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184428748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:11,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:11,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:07:11,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948820294] [2021-11-20 06:07:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:11,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:07:11,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:07:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:07:11,597 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 06:07:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:11,650 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2021-11-20 06:07:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:07:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2021-11-20 06:07:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:11,654 INFO L225 Difference]: With dead ends: 147 [2021-11-20 06:07:11,654 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 06:07:11,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:07:11,655 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:11,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 06:07:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2021-11-20 06:07:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:07:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-11-20 06:07:11,681 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 58 [2021-11-20 06:07:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:11,681 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-11-20 06:07:11,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 06:07:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-11-20 06:07:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:07:11,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:11,683 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:11,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:07:11,893 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1758184689, now seen corresponding path program 4 times [2021-11-20 06:07:11,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805634890] [2021-11-20 06:07:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:11,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:11,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:11,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201459298] [2021-11-20 06:07:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:07:11,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:11,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:11,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:07:12,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:07:12,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:07:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 06:07:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:12,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:07:12,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 06:07:12,592 INFO L354 Elim1Store]: treesize reduction 152, result has 20.4 percent of original size [2021-11-20 06:07:12,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 99 [2021-11-20 06:07:12,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2021-11-20 06:07:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 26 [2021-11-20 06:07:12,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:12,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:07:12,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 138 [2021-11-20 06:07:13,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 44 [2021-11-20 06:07:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:07:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 06:07:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:13,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 17 [2021-11-20 06:07:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,392 INFO L354 Elim1Store]: treesize reduction 497, result has 27.0 percent of original size [2021-11-20 06:07:14,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 133 treesize of output 253 [2021-11-20 06:07:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:14,730 INFO L354 Elim1Store]: treesize reduction 127, result has 43.0 percent of original size [2021-11-20 06:07:14,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 327 treesize of output 325 [2021-11-20 06:07:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,461 INFO L354 Elim1Store]: treesize reduction 1533, result has 35.6 percent of original size [2021-11-20 06:07:16,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 292 treesize of output 1056 [2021-11-20 06:07:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 66 [2021-11-20 06:07:17,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:07:17,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:07:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:17,756 INFO L354 Elim1Store]: treesize reduction 134, result has 37.4 percent of original size [2021-11-20 06:07:17,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 146 treesize of output 148 [2021-11-20 06:07:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 66 [2021-11-20 06:07:18,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:07:18,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 66 [2021-11-20 06:07:18,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:07:19,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:07:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 66 [2021-11-20 06:07:19,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:07:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,115 INFO L354 Elim1Store]: treesize reduction 295, result has 37.0 percent of original size [2021-11-20 06:07:20,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 347 treesize of output 418 [2021-11-20 06:07:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 164 [2021-11-20 06:07:20,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:20,876 INFO L354 Elim1Store]: treesize reduction 157, result has 36.4 percent of original size [2021-11-20 06:07:20,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 291 treesize of output 281 [2021-11-20 06:07:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:21,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:21,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:21,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:07:21,635 INFO L354 Elim1Store]: treesize reduction 338, result has 35.7 percent of original size [2021-11-20 06:07:21,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 626 treesize of output 586 [2021-11-20 06:07:23,850 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-20 06:07:23,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 38 [2021-11-20 06:07:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:07:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:01,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:08:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 966 treesize of output 966 [2021-11-20 06:08:01,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-20 06:08:01,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-20 06:08:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 945 treesize of output 909 [2021-11-20 06:08:03,690 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-11-20 06:08:03,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 863299 treesize of output 815478 [2021-11-20 06:08:05,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:05,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805634890] [2021-11-20 06:08:05,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:08:05,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201459298] [2021-11-20 06:08:05,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:08:05,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:05,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 06:08:05,584 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 06:08:05,584 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 06:08:05,595 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:08:05,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:08:05,799 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 1, 1, 1, 1, 1] [2021-11-20 06:08:05,801 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:08:05,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:08:05 BoogieIcfgContainer [2021-11-20 06:08:05,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:08:05,820 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:08:05,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:08:05,821 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:08:05,821 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:55:07" (3/4) ... [2021-11-20 06:08:05,824 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:08:05,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:08:05,825 INFO L158 Benchmark]: Toolchain (without parser) took 779193.85ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 77.7MB in the beginning and 161.3MB in the end (delta: -83.7MB). Peak memory consumption was 527.4kB. Max. memory is 16.1GB. [2021-11-20 06:08:05,825 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 64.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:08:05,825 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.03ms. Allocated memory is still 109.1MB. Free memory was 77.4MB in the beginning and 83.1MB in the end (delta: -5.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:08:05,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.08ms. Allocated memory is still 109.1MB. Free memory was 83.1MB in the beginning and 81.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:08:05,826 INFO L158 Benchmark]: Boogie Preprocessor took 28.07ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 79.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:08:05,826 INFO L158 Benchmark]: RCFGBuilder took 344.14ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 68.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 06:08:05,827 INFO L158 Benchmark]: TraceAbstraction took 778499.12ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 68.1MB in the beginning and 162.4MB in the end (delta: -94.3MB). Peak memory consumption was 104.6MB. Max. memory is 16.1GB. [2021-11-20 06:08:05,827 INFO L158 Benchmark]: Witness Printer took 3.94ms. Allocated memory is still 192.9MB. Free memory was 162.4MB in the beginning and 161.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:08:05,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 64.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.03ms. Allocated memory is still 109.1MB. Free memory was 77.4MB in the beginning and 83.1MB in the end (delta: -5.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.08ms. Allocated memory is still 109.1MB. Free memory was 83.1MB in the beginning and 81.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.07ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 79.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 344.14ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 68.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 778499.12ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 68.1MB in the beginning and 162.4MB in the end (delta: -94.3MB). Peak memory consumption was 104.6MB. Max. memory is 16.1GB. * Witness Printer took 3.94ms. Allocated memory is still 192.9MB. Free memory was 162.4MB in the beginning and 161.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - UnprovableResult [Line: 35]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L39] signed long long ARR_SIZE ; [L43] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L44] CALL assume_abort_if_not(ARR_SIZE > 0) [L33] COND FALSE !(!cond) [L44] RET assume_abort_if_not(ARR_SIZE > 0) [L46] int array[ARR_SIZE][ARR_SIZE] ; [L48] int row = 0, column = 0, num = -1 ; [L49] signed long long sum = 0 ; [L50] int temp ; [L51] short index1,index2 ; [L53] row=0 [L53] COND TRUE row=0 && index1 < ARR_SIZE) [L33] COND FALSE !(!cond) [L62] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L63] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L33] COND FALSE !(!cond) [L63] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L66] EXPR (index1 == index2) ? num : array[index1][index2] [L66] EXPR array[index1][index2] [L66] EXPR (index1 == index2) ? num : array[index1][index2] [L66] array[index1][index2] = (index1 == index2) ? num : array[index1][index2] [L67] EXPR (index1 == index2) ? (num*num*num*num) : array[ARR_SIZE-1-index1][index2] [L67] EXPR array[ARR_SIZE-1-index1][index2] [L67] EXPR (index1 == index2) ? (num*num*num*num) : array[ARR_SIZE-1-index1][index2] [L67] array[ARR_SIZE-1-index1][index2] = (index1 == index2) ? (num*num*num*num) : array[ARR_SIZE-1-index1][index2] [L70] temp = __VERIFIER_nondet_int() [L71] COND TRUE temp == 0 [L74] row=0 [L74] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 [2021-11-20 06:08:08,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:08:08,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:08:08,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:08:08,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:08:08,856 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:08:08,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array18_pattern.c [2021-11-20 06:08:08,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/f684e73fb/b97b11e9e9ec49339aea8de9658abb0a/FLAG25a4effd2 [2021-11-20 06:08:09,539 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:08:09,540 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/sv-benchmarks/c/array-patterns/array18_pattern.c [2021-11-20 06:08:09,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/f684e73fb/b97b11e9e9ec49339aea8de9658abb0a/FLAG25a4effd2 [2021-11-20 06:08:09,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/data/f684e73fb/b97b11e9e9ec49339aea8de9658abb0a [2021-11-20 06:08:09,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:08:09,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:08:09,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:09,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:08:09,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:08:09,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:09" (1/1) ... [2021-11-20 06:08:09,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242f65d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:09, skipping insertion in model container [2021-11-20 06:08:09,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:09" (1/1) ... [2021-11-20 06:08:09,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:08:09,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:08:10,053 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2021-11-20 06:08:10,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:10,116 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:08:10,140 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2021-11-20 06:08:10,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:10,204 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:08:10,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10 WrapperNode [2021-11-20 06:08:10,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:10,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:10,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:08:10,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:08:10,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,269 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2021-11-20 06:08:10,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:10,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:08:10,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:08:10,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:08:10,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:08:10,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:08:10,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:08:10,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:08:10,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (1/1) ... [2021-11-20 06:08:10,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:10,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:08:10,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:08:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:08:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:08:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:08:10,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:08:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:08:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:08:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:08:10,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:08:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:08:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:08:10,529 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:08:10,530 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:08:10,953 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:08:10,960 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:08:10,960 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 06:08:10,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:10 BoogieIcfgContainer [2021-11-20 06:08:10,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:08:10,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:08:10,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:08:10,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:08:10,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:08:09" (1/3) ... [2021-11-20 06:08:10,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505cf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:10, skipping insertion in model container [2021-11-20 06:08:10,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:10" (2/3) ... [2021-11-20 06:08:10,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505cf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:10, skipping insertion in model container [2021-11-20 06:08:10,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:10" (3/3) ... [2021-11-20 06:08:10,970 INFO L111 eAbstractionObserver]: Analyzing ICFG array18_pattern.c [2021-11-20 06:08:10,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:08:10,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:08:11,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:08:11,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:08:11,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:08:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:08:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:08:11,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:11,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:11,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2021-11-20 06:08:11,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:08:11,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810064160] [2021-11-20 06:08:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:11,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:08:11,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:08:11,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:08:11,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:08:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:08:11,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:11,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:08:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810064160] [2021-11-20 06:08:11,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810064160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:11,398 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:11,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:08:11,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879795436] [2021-11-20 06:08:11,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:11,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:08:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:08:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:08:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:08:11,443 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:08:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:11,470 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2021-11-20 06:08:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:08:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 06:08:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:11,480 INFO L225 Difference]: With dead ends: 63 [2021-11-20 06:08:11,480 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 06:08:11,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:08:11,488 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:11,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 06:08:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 06:08:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:08:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-11-20 06:08:11,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2021-11-20 06:08:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:11,528 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-11-20 06:08:11,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:08:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-11-20 06:08:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:08:11,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:11,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:11,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:11,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:08:11,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2021-11-20 06:08:11,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:08:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649989058] [2021-11-20 06:08:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:11,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:08:11,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:08:11,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:08:11,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:08:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:11,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:08:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:08:12,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:08:12,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:08:12,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649989058] [2021-11-20 06:08:12,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649989058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:12,391 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:12,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:08:12,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158172556] [2021-11-20 06:08:12,392 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:12,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:08:12,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:08:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:08:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:08:12,395 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:08:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:12,487 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-20 06:08:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:08:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-11-20 06:08:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:12,489 INFO L225 Difference]: With dead ends: 36 [2021-11-20 06:08:12,489 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:08:12,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:08:12,492 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:12,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:08:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:08:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 06:08:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:08:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-11-20 06:08:12,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2021-11-20 06:08:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:12,503 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-11-20 06:08:12,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:08:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-11-20 06:08:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:08:12,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:12,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:12,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:12,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:08:12,718 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2021-11-20 06:08:12,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:08:12,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005219176] [2021-11-20 06:08:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:12,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:08:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:08:12,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:08:12,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:08:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:08:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:08:13,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:08:13,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:08:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005219176] [2021-11-20 06:08:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005219176] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:13,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:13,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 06:08:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910814816] [2021-11-20 06:08:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:13,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:08:13,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:08:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:08:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:08:13,594 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:08:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:13,615 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-11-20 06:08:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:08:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-20 06:08:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:13,619 INFO L225 Difference]: With dead ends: 61 [2021-11-20 06:08:13,619 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:08:13,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:08:13,626 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:13,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2021-11-20 06:08:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:08:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 06:08:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:08:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-20 06:08:13,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2021-11-20 06:08:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:13,647 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-20 06:08:13,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:08:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-20 06:08:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:08:13,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:13,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:13,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:13,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:08:13,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:13,868 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2021-11-20 06:08:13,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:08:13,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606459143] [2021-11-20 06:08:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:13,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:08:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:08:13,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:08:13,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:08:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:08:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:08:14,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:08:14,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:08:14,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606459143] [2021-11-20 06:08:14,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606459143] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:14,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:14,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 06:08:14,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202040873] [2021-11-20 06:08:14,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:14,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:08:14,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:08:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:08:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:08:14,649 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:08:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:14,668 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-11-20 06:08:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:08:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2021-11-20 06:08:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:14,671 INFO L225 Difference]: With dead ends: 66 [2021-11-20 06:08:14,671 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 06:08:14,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:08:14,673 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:14,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2021-11-20 06:08:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 06:08:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 06:08:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:08:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-20 06:08:14,691 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2021-11-20 06:08:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:14,692 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-20 06:08:14,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:08:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-20 06:08:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:08:14,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:14,696 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:14,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:08:14,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2021-11-20 06:08:14,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:08:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050881561] [2021-11-20 06:08:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:14,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:08:14,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:08:14,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:08:14,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a195d6d3-8c6f-4a9e-b9fb-bd29d8b27ad7/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:08:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:08:15,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 06:08:18,818 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-20 06:08:18,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-11-20 06:08:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:08:19,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-11-20 06:08:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115