./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa --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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:28:59,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:28:59,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:28:59,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:28:59,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:28:59,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:28:59,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:28:59,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:28:59,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:28:59,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:28:59,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:28:59,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:28:59,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:28:59,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:28:59,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:28:59,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:28:59,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:28:59,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:28:59,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:28:59,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:28:59,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:28:59,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:28:59,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:28:59,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:28:59,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:28:59,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:28:59,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:28:59,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:28:59,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:28:59,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:28:59,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:28:59,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:28:59,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:28:59,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:28:59,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:28:59,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:28:59,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:28:59,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:28:59,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:28:59,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:28:59,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:28:59,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:28:59,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:28:59,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:28:59,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:28:59,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:28:59,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:28:59,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:28:59,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:28:59,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:28:59,440 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:28:59,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:28:59,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:28:59,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:28:59,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:28:59,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:28:59,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:28:59,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:28:59,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:28:59,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:28:59,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:28:59,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:28:59,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:28:59,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:28:59,443 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:28:59,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:28:59,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:28:59,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:28:59,443 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_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2021-12-06 20:28:59,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:28:59,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:28:59,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:28:59,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:28:59,631 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:28:59,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-12-06 20:28:59,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/data/5a381ca5f/54fdaf8d58754782a452e5ea288aa0cd/FLAG51ddc0e9f [2021-12-06 20:29:00,041 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:29:00,042 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-12-06 20:29:00,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/data/5a381ca5f/54fdaf8d58754782a452e5ea288aa0cd/FLAG51ddc0e9f [2021-12-06 20:29:00,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/data/5a381ca5f/54fdaf8d58754782a452e5ea288aa0cd [2021-12-06 20:29:00,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:29:00,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:29:00,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:29:00,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:29:00,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:29:00,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a885894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00, skipping insertion in model container [2021-12-06 20:29:00,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:29:00,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:29:00,193 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_144d59f4-3938-491c-b5f3-a59e666a7e71/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-12-06 20:29:00,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:29:00,216 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:29:00,225 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_144d59f4-3938-491c-b5f3-a59e666a7e71/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-12-06 20:29:00,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:29:00,246 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:29:00,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00 WrapperNode [2021-12-06 20:29:00,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:29:00,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:29:00,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:29:00,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:29:00,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,285 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2021-12-06 20:29:00,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:29:00,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:29:00,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:29:00,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:29:00,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:29:00,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:29:00,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:29:00,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:29:00,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (1/1) ... [2021-12-06 20:29:00,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:29:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:00,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:29:00,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:29:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:29:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:29:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 20:29:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:29:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:29:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:29:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:29:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 20:29:00,426 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:29:00,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:29:00,543 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:29:00,548 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:29:00,548 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-06 20:29:00,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:29:00 BoogieIcfgContainer [2021-12-06 20:29:00,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:29:00,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:29:00,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:29:00,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:29:00,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:29:00" (1/3) ... [2021-12-06 20:29:00,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646989ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:29:00, skipping insertion in model container [2021-12-06 20:29:00,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:29:00" (2/3) ... [2021-12-06 20:29:00,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646989ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:29:00, skipping insertion in model container [2021-12-06 20:29:00,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:29:00" (3/3) ... [2021-12-06 20:29:00,555 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-12-06 20:29:00,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:29:00,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:29:00,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:29:00,600 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 [2021-12-06 20:29:00,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:29:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:29:00,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:00,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:00,617 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2021-12-06 20:29:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862822866] [2021-12-06 20:29:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:00,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:00,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:00,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974466707] [2021-12-06 20:29:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:00,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:00,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:00,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:29:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 20:29:00,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:29:00,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:29:00,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:00,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862822866] [2021-12-06 20:29:00,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:00,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974466707] [2021-12-06 20:29:00,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974466707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:29:00,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:29:00,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:29:00,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240085493] [2021-12-06 20:29:00,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:29:00,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:29:00,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:00,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:29:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:29:00,854 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:00,870 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2021-12-06 20:29:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:29:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 20:29:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:00,879 INFO L225 Difference]: With dead ends: 67 [2021-12-06 20:29:00,880 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 20:29:00,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:29:00,886 INFO L933 BasicCegarLoop]: 46 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, 46 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 [2021-12-06 20:29:00,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 20:29:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 20:29:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-12-06 20:29:00,921 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2021-12-06 20:29:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:00,922 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-12-06 20:29:00,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-12-06 20:29:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:29:00,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:00,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:00,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:29:01,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:01,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2021-12-06 20:29:01,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:01,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268833647] [2021-12-06 20:29:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:01,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:01,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:01,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561435015] [2021-12-06 20:29:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:01,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:01,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:01,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:29:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:29:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:29:01,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:29:01,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268833647] [2021-12-06 20:29:01,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561435015] [2021-12-06 20:29:01,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561435015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:29:01,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:29:01,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:29:01,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752746601] [2021-12-06 20:29:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:29:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:29:01,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:29:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:01,241 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:01,298 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2021-12-06 20:29:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:29:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 20:29:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:01,300 INFO L225 Difference]: With dead ends: 73 [2021-12-06 20:29:01,300 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:29:01,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:01,301 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:01,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 33 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:29:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-12-06 20:29:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2021-12-06 20:29:01,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2021-12-06 20:29:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:01,308 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2021-12-06 20:29:01,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2021-12-06 20:29:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:29:01,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:01,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:01,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:29:01,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:01,511 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash -785961326, now seen corresponding path program 1 times [2021-12-06 20:29:01,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:01,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571525998] [2021-12-06 20:29:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:01,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:01,542 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:01,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007580753] [2021-12-06 20:29:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:01,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:01,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:01,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:29:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:29:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:29:01,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:29:01,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571525998] [2021-12-06 20:29:01,717 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007580753] [2021-12-06 20:29:01,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007580753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:29:01,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:29:01,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:29:01,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680016723] [2021-12-06 20:29:01,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:29:01,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:29:01,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:29:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:01,719 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:01,769 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2021-12-06 20:29:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:29:01,769 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 20:29:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:01,770 INFO L225 Difference]: With dead ends: 78 [2021-12-06 20:29:01,770 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:29:01,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:01,771 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:01,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:29:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-12-06 20:29:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-12-06 20:29:01,778 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2021-12-06 20:29:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:01,778 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-12-06 20:29:01,778 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-12-06 20:29:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:29:01,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:01,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:01,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:29:01,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:01,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1148207861, now seen corresponding path program 1 times [2021-12-06 20:29:01,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:01,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506789222] [2021-12-06 20:29:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:01,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:02,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:02,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422648234] [2021-12-06 20:29:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:02,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:02,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:02,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:02,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:29:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:29:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:29:02,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:29:02,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506789222] [2021-12-06 20:29:02,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422648234] [2021-12-06 20:29:02,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422648234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:29:02,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:29:02,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:29:02,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829710395] [2021-12-06 20:29:02,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:29:02,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:29:02,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:02,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:29:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:02,098 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:02,144 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2021-12-06 20:29:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:29:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 20:29:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:02,146 INFO L225 Difference]: With dead ends: 80 [2021-12-06 20:29:02,146 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:29:02,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:02,147 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:02,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 38 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:29:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-12-06 20:29:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-12-06 20:29:02,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 21 [2021-12-06 20:29:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:02,156 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-12-06 20:29:02,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-12-06 20:29:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:29:02,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:02,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:02,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:29:02,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 20:29:02,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1730545667, now seen corresponding path program 1 times [2021-12-06 20:29:02,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:02,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719264488] [2021-12-06 20:29:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:02,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:02,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:02,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664906746] [2021-12-06 20:29:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:02,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:02,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:02,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:02,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:29:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:02,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:29:02,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:29:02,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:29:02,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719264488] [2021-12-06 20:29:02,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:02,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664906746] [2021-12-06 20:29:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664906746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:02,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:29:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 20:29:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344085154] [2021-12-06 20:29:02,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:02,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:29:02,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:29:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:29:02,531 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:02,628 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2021-12-06 20:29:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:29:02,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:29:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:02,630 INFO L225 Difference]: With dead ends: 126 [2021-12-06 20:29:02,630 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 20:29:02,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:29:02,631 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 116 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:02,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 80 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:29:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 20:29:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 48. [2021-12-06 20:29:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 47 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2021-12-06 20:29:02,639 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 22 [2021-12-06 20:29:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:02,639 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2021-12-06 20:29:02,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2021-12-06 20:29:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:29:02,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:02,640 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:02,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:29:02,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:02,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash 340179723, now seen corresponding path program 2 times [2021-12-06 20:29:02,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:02,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200024604] [2021-12-06 20:29:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:02,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:02,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:02,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499994799] [2021-12-06 20:29:02,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:29:02,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:02,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:02,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:29:02,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 20:29:02,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:29:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 20:29:02,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:29:02,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200024604] [2021-12-06 20:29:02,960 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499994799] [2021-12-06 20:29:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499994799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:29:02,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:29:02,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:29:02,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68565838] [2021-12-06 20:29:02,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:29:02,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:29:02,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:29:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:02,961 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:03,002 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2021-12-06 20:29:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:29:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 20:29:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:03,003 INFO L225 Difference]: With dead ends: 109 [2021-12-06 20:29:03,003 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 20:29:03,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:03,005 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:03,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 20:29:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2021-12-06 20:29:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2021-12-06 20:29:03,016 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 25 [2021-12-06 20:29:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:03,016 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2021-12-06 20:29:03,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2021-12-06 20:29:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:29:03,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:03,017 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:03,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 20:29:03,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:03,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1522127699, now seen corresponding path program 1 times [2021-12-06 20:29:03,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:03,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103494100] [2021-12-06 20:29:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:03,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:03,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:03,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659266485] [2021-12-06 20:29:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:03,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:03,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:03,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:29:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:29:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:29:03,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:29:03,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103494100] [2021-12-06 20:29:03,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659266485] [2021-12-06 20:29:03,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659266485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:03,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:29:03,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 20:29:03,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924410897] [2021-12-06 20:29:03,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:03,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:29:03,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:29:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:29:03,436 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:03,634 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2021-12-06 20:29:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:29:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 20:29:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:03,638 INFO L225 Difference]: With dead ends: 236 [2021-12-06 20:29:03,639 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 20:29:03,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:29:03,640 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 516 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:03,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 125 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:29:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 20:29:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 73. [2021-12-06 20:29:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-12-06 20:29:03,650 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 28 [2021-12-06 20:29:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:03,650 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-12-06 20:29:03,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-12-06 20:29:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 20:29:03,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:03,652 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:03,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 20:29:03,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:03,853 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1337282643, now seen corresponding path program 2 times [2021-12-06 20:29:03,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:03,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413560642] [2021-12-06 20:29:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:03,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:03,885 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611213324] [2021-12-06 20:29:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:29:03,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:03,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:29:03,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 20:29:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:29:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 20:29:04,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:29:04,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413560642] [2021-12-06 20:29:04,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611213324] [2021-12-06 20:29:04,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611213324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:29:04,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:29:04,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:29:04,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362236892] [2021-12-06 20:29:04,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:29:04,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:29:04,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:29:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:29:04,023 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:04,079 INFO L93 Difference]: Finished difference Result 170 states and 217 transitions. [2021-12-06 20:29:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:29:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 20:29:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:04,080 INFO L225 Difference]: With dead ends: 170 [2021-12-06 20:29:04,080 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 20:29:04,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:29:04,082 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:04,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 20:29:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 74. [2021-12-06 20:29:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-12-06 20:29:04,095 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 34 [2021-12-06 20:29:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:04,095 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-12-06 20:29:04,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-12-06 20:29:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:29:04,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:04,097 INFO L514 BasicCegarLoop]: trace histogram [10, 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] [2021-12-06 20:29:04,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:29:04,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:04,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 253285028, now seen corresponding path program 1 times [2021-12-06 20:29:04,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:04,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805996488] [2021-12-06 20:29:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:04,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:04,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:04,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191823691] [2021-12-06 20:29:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:04,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:04,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:04,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:04,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:29:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:04,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:29:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:29:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:29:04,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805996488] [2021-12-06 20:29:04,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191823691] [2021-12-06 20:29:04,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191823691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:04,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:29:04,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-06 20:29:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231124555] [2021-12-06 20:29:04,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:04,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 20:29:04,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 20:29:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-06 20:29:04,723 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:05,333 INFO L93 Difference]: Finished difference Result 476 states and 641 transitions. [2021-12-06 20:29:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 20:29:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 20:29:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:05,336 INFO L225 Difference]: With dead ends: 476 [2021-12-06 20:29:05,336 INFO L226 Difference]: Without dead ends: 407 [2021-12-06 20:29:05,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:29:05,338 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 962 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:05,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 250 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:29:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-06 20:29:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 122. [2021-12-06 20:29:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 154 transitions. [2021-12-06 20:29:05,356 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 154 transitions. Word has length 37 [2021-12-06 20:29:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:05,356 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 154 transitions. [2021-12-06 20:29:05,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 154 transitions. [2021-12-06 20:29:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:29:05,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:05,358 INFO L514 BasicCegarLoop]: trace histogram [22, 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] [2021-12-06 20:29:05,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 20:29:05,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:05,560 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1853672612, now seen corresponding path program 2 times [2021-12-06 20:29:05,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:05,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991538186] [2021-12-06 20:29:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:05,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:05,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:05,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930400306] [2021-12-06 20:29:05,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:29:05,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:05,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:05,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:29:05,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:29:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:29:05,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:29:06,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:29:06,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991538186] [2021-12-06 20:29:06,569 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930400306] [2021-12-06 20:29:06,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930400306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:06,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:29:06,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 20:29:06,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471038247] [2021-12-06 20:29:06,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:06,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 20:29:06,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 20:29:06,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 20:29:06,572 INFO L87 Difference]: Start difference. First operand 122 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:08,558 INFO L93 Difference]: Finished difference Result 932 states and 1253 transitions. [2021-12-06 20:29:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 20:29:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-06 20:29:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:08,562 INFO L225 Difference]: With dead ends: 932 [2021-12-06 20:29:08,562 INFO L226 Difference]: Without dead ends: 815 [2021-12-06 20:29:08,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 20:29:08,564 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2714 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:08,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2714 Valid, 474 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:29:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-12-06 20:29:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 218. [2021-12-06 20:29:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.262672811059908) internal successors, (274), 217 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 274 transitions. [2021-12-06 20:29:08,584 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 274 transitions. Word has length 49 [2021-12-06 20:29:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:08,584 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 274 transitions. [2021-12-06 20:29:08,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 274 transitions. [2021-12-06 20:29:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:29:08,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:08,586 INFO L514 BasicCegarLoop]: trace histogram [46, 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] [2021-12-06 20:29:08,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:29:08,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:29:08,788 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash 391102628, now seen corresponding path program 3 times [2021-12-06 20:29:08,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:08,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025000395] [2021-12-06 20:29:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:08,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:08,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:08,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585210334] [2021-12-06 20:29:08,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:29:08,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:08,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:08,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:08,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:29:08,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 20:29:08,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:29:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2021-12-06 20:29:09,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2021-12-06 20:29:09,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025000395] [2021-12-06 20:29:09,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585210334] [2021-12-06 20:29:09,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585210334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:09,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:29:09,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 20:29:09,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740757903] [2021-12-06 20:29:09,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:09,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:29:09,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:29:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:29:09,169 INFO L87 Difference]: Start difference. First operand 218 states and 274 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:09,327 INFO L93 Difference]: Finished difference Result 989 states and 1257 transitions. [2021-12-06 20:29:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:29:09,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 20:29:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:09,333 INFO L225 Difference]: With dead ends: 989 [2021-12-06 20:29:09,333 INFO L226 Difference]: Without dead ends: 828 [2021-12-06 20:29:09,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:29:09,334 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 314 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:09,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 40 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:29:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-12-06 20:29:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 389. [2021-12-06 20:29:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.1778350515463918) internal successors, (457), 388 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 457 transitions. [2021-12-06 20:29:09,383 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 457 transitions. Word has length 73 [2021-12-06 20:29:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:09,383 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 457 transitions. [2021-12-06 20:29:09,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 457 transitions. [2021-12-06 20:29:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 20:29:09,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:09,388 INFO L514 BasicCegarLoop]: trace histogram [184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:09,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 20:29:09,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:09,589 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1903403635, now seen corresponding path program 4 times [2021-12-06 20:29:09,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421060138] [2021-12-06 20:29:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:09,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:09,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168824222] [2021-12-06 20:29:09,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:29:09,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:09,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:09,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:09,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:29:09,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:29:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:29:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17651 backedges. 8867 proven. 4432 refuted. 0 times theorem prover too weak. 4352 trivial. 0 not checked. [2021-12-06 20:29:10,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17651 backedges. 6653 proven. 6646 refuted. 0 times theorem prover too weak. 4352 trivial. 0 not checked. [2021-12-06 20:29:10,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421060138] [2021-12-06 20:29:10,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:29:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168824222] [2021-12-06 20:29:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168824222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:10,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:29:10,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 20:29:10,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556718587] [2021-12-06 20:29:10,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:10,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:29:10,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:29:10,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:29:10,384 INFO L87 Difference]: Start difference. First operand 389 states and 457 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:10,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:10,677 INFO L93 Difference]: Finished difference Result 1853 states and 2244 transitions. [2021-12-06 20:29:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:29:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-12-06 20:29:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:10,684 INFO L225 Difference]: With dead ends: 1853 [2021-12-06 20:29:10,684 INFO L226 Difference]: Without dead ends: 1519 [2021-12-06 20:29:10,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:29:10,685 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 216 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:10,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 59 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:29:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-12-06 20:29:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 726. [2021-12-06 20:29:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.1655172413793105) internal successors, (845), 725 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 845 transitions. [2021-12-06 20:29:10,766 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 845 transitions. Word has length 238 [2021-12-06 20:29:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:10,767 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 845 transitions. [2021-12-06 20:29:10,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:29:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 845 transitions. [2021-12-06 20:29:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-06 20:29:10,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:10,773 INFO L514 BasicCegarLoop]: trace histogram [368, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:10,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:29:10,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:29:10,973 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash 150263851, now seen corresponding path program 5 times [2021-12-06 20:29:10,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:10,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524037031] [2021-12-06 20:29:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:10,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:11,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:29:11,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355941044] [2021-12-06 20:29:11,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:29:11,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:11,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:11,042 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:11,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144d59f4-3938-491c-b5f3-a59e666a7e71/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process