./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G --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 e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:34:15,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:34:15,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:34:15,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:34:15,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:34:15,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:34:15,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:34:15,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:34:15,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:34:15,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:34:15,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:34:15,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:34:15,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:34:15,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:34:15,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:34:15,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:34:15,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:34:15,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:34:15,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:34:15,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:34:15,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:34:15,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:34:15,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:34:15,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:34:15,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:34:15,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:34:15,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:34:15,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:34:15,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:34:15,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:34:15,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:34:15,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:34:15,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:34:15,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:34:15,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:34:15,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:34:15,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:34:15,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:34:15,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:34:15,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:34:15,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:34:15,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:34:15,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:34:15,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:34:15,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:34:15,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:34:15,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:34:15,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:34:15,577 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:34:15,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:34:15,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:34:15,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:34:15,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:34:15,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:34:15,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:34:15,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:34:15,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:34:15,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:34:15,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:34:15,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:34:15,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:34:15,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:34:15,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:34:15,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:34:15,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:34:15,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:34:15,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:34:15,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:34:15,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:34:15,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:34:15,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:34:15,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:34:15,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:34:15,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:34:15,585 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_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 [2021-11-23 12:34:15,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:34:15,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:34:15,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:34:15,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:34:15,897 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:34:15,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-11-23 12:34:15,995 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/data/859052ad9/4a906eaf4e934e72b7d3fb8548485fdd/FLAG549f9fb2e [2021-11-23 12:34:16,452 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:34:16,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-11-23 12:34:16,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/data/859052ad9/4a906eaf4e934e72b7d3fb8548485fdd/FLAG549f9fb2e [2021-11-23 12:34:16,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/data/859052ad9/4a906eaf4e934e72b7d3fb8548485fdd [2021-11-23 12:34:16,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:34:16,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:34:16,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:34:16,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:34:16,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:34:16,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:34:16" (1/1) ... [2021-11-23 12:34:16,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f8e603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:16, skipping insertion in model container [2021-11-23 12:34:16,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:34:16" (1/1) ... [2021-11-23 12:34:16,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:34:16,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:34:17,093 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_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2021-11-23 12:34:17,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:34:17,122 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:34:17,135 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_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2021-11-23 12:34:17,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:34:17,158 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:34:17,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17 WrapperNode [2021-11-23 12:34:17,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:34:17,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:34:17,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:34:17,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:34:17,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,203 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 58 [2021-11-23 12:34:17,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:34:17,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:34:17,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:34:17,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:34:17,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:34:17,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:34:17,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:34:17,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:34:17,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (1/1) ... [2021-11-23 12:34:17,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:34:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:17,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:34:17,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:34:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:34:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:34:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:34:17,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:34:17,407 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:34:17,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:34:17,579 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:34:17,587 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:34:17,592 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:34:17,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:34:17 BoogieIcfgContainer [2021-11-23 12:34:17,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:34:17,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:34:17,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:34:17,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:34:17,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:34:16" (1/3) ... [2021-11-23 12:34:17,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e3a298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:34:17, skipping insertion in model container [2021-11-23 12:34:17,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:17" (2/3) ... [2021-11-23 12:34:17,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e3a298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:34:17, skipping insertion in model container [2021-11-23 12:34:17,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:34:17" (3/3) ... [2021-11-23 12:34:17,625 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2021-11-23 12:34:17,631 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:34:17,631 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 12:34:17,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:34:17,720 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:34:17,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 12:34:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:34:17,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:17,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:17,779 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:17,797 INFO L85 PathProgramCache]: Analyzing trace with hash 120151435, now seen corresponding path program 1 times [2021-11-23 12:34:17,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:17,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801788526] [2021-11-23 12:34:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:17,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:17,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801788526] [2021-11-23 12:34:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801788526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:17,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:34:17,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:34:17,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736345888] [2021-11-23 12:34:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:17,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:34:17,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:34:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:34:18,032 INFO L87 Difference]: Start difference. First operand has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:18,062 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-11-23 12:34:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:34:18,065 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 12:34:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:18,074 INFO L225 Difference]: With dead ends: 43 [2021-11-23 12:34:18,075 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 12:34:18,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:34:18,084 INFO L933 BasicCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:18,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 12:34:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 12:34:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 12:34:18,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 8 [2021-11-23 12:34:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:18,133 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 12:34:18,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 12:34:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:34:18,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:18,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:34:18,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-11-23 12:34:18,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676980122] [2021-11-23 12:34:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:18,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:18,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:18,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517811291] [2021-11-23 12:34:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:18,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:18,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:18,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:34:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:34:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:18,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:34:18,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:18,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676980122] [2021-11-23 12:34:18,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:34:18,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517811291] [2021-11-23 12:34:18,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517811291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:34:18,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:34:18,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:34:18,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289905412] [2021-11-23 12:34:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:34:18,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:34:18,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:34:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:34:18,458 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:18,514 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-23 12:34:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:34:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 12:34:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:18,515 INFO L225 Difference]: With dead ends: 38 [2021-11-23 12:34:18,515 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 12:34:18,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:34:18,518 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:18,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 12:34:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-23 12:34:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 12:34:18,526 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2021-11-23 12:34:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:18,526 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 12:34:18,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 12:34:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:34:18,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:18,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:18,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:18,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash 888723645, now seen corresponding path program 1 times [2021-11-23 12:34:18,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:18,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353755119] [2021-11-23 12:34:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:18,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:18,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:18,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325540468] [2021-11-23 12:34:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:18,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:18,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:18,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:34:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:18,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 12:34:18,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:18,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:34:19,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353755119] [2021-11-23 12:34:19,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:34:19,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325540468] [2021-11-23 12:34:19,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325540468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:19,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:34:19,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-23 12:34:19,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822740987] [2021-11-23 12:34:19,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:34:19,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:34:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:34:19,114 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:19,317 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-23 12:34:19,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:34:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:34:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:19,320 INFO L225 Difference]: With dead ends: 35 [2021-11-23 12:34:19,320 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 12:34:19,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:34:19,322 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:19,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:34:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 12:34:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2021-11-23 12:34:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-23 12:34:19,331 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-11-23 12:34:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:19,332 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-23 12:34:19,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-23 12:34:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:34:19,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:19,333 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:19,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:19,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 12:34:19,534 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1746872147, now seen corresponding path program 1 times [2021-11-23 12:34:19,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130445789] [2021-11-23 12:34:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:19,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:19,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:19,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747765339] [2021-11-23 12:34:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:19,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:19,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:19,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:34:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:34:19,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:19,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:19,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130445789] [2021-11-23 12:34:19,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:34:19,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747765339] [2021-11-23 12:34:19,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747765339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:19,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:34:19,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 12:34:19,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571119522] [2021-11-23 12:34:19,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:19,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:34:19,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:34:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:34:19,777 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:19,857 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-23 12:34:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:34:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 12:34:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:19,861 INFO L225 Difference]: With dead ends: 50 [2021-11-23 12:34:19,861 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 12:34:19,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:34:19,867 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:19,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 64 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 12:34:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-11-23 12:34:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-23 12:34:19,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2021-11-23 12:34:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:19,902 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-23 12:34:19,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-23 12:34:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:34:19,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:19,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:19,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:20,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:20,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1783069641, now seen corresponding path program 1 times [2021-11-23 12:34:20,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:20,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646357817] [2021-11-23 12:34:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:20,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:20,133 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:20,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471846864] [2021-11-23 12:34:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:20,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:20,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:20,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:20,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:34:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:20,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:34:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:20,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:20,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:20,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646357817] [2021-11-23 12:34:20,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:34:20,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471846864] [2021-11-23 12:34:20,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471846864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:20,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:34:20,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-23 12:34:20,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629273386] [2021-11-23 12:34:20,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:20,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:34:20,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:20,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:34:20,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:34:20,735 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:20,831 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-11-23 12:34:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:34:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 12:34:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:20,833 INFO L225 Difference]: With dead ends: 38 [2021-11-23 12:34:20,833 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 12:34:20,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:34:20,834 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:20,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-23 12:34:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 12:34:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 12:34:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-11-23 12:34:20,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2021-11-23 12:34:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:20,843 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-11-23 12:34:20,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-11-23 12:34:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:34:20,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:20,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:20,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 12:34:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:21,073 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 51604248, now seen corresponding path program 2 times [2021-11-23 12:34:21,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:21,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480248947] [2021-11-23 12:34:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:21,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:21,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783537150] [2021-11-23 12:34:21,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:34:21,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:21,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:21,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:34:21,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:34:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:34:21,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:21,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480248947] [2021-11-23 12:34:21,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:34:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783537150] [2021-11-23 12:34:21,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783537150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:21,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:34:21,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-23 12:34:21,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810322332] [2021-11-23 12:34:21,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:21,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 12:34:21,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:34:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:34:21,863 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-11-23 12:34:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:22,084 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-11-23 12:34:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:34:22,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) Word has length 24 [2021-11-23 12:34:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:22,086 INFO L225 Difference]: With dead ends: 56 [2021-11-23 12:34:22,086 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 12:34:22,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:34:22,088 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:22,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-23 12:34:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 12:34:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-23 12:34:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-23 12:34:22,100 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2021-11-23 12:34:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:22,101 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-23 12:34:22,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-11-23 12:34:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-23 12:34:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 12:34:22,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:22,102 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:22,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:22,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 12:34:22,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:22,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1100116932, now seen corresponding path program 2 times [2021-11-23 12:34:22,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:22,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404167332] [2021-11-23 12:34:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:22,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:22,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:22,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806031540] [2021-11-23 12:34:22,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:34:22,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:22,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:22,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:22,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:34:22,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:34:22,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 12:34:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:22,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404167332] [2021-11-23 12:34:22,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:34:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806031540] [2021-11-23 12:34:22,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806031540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:22,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:34:22,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-23 12:34:22,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324667254] [2021-11-23 12:34:22,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:22,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:34:22,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:34:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:34:22,609 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:22,666 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-23 12:34:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:34:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-23 12:34:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:22,668 INFO L225 Difference]: With dead ends: 46 [2021-11-23 12:34:22,668 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:34:22,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:34:22,669 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:22,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:34:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:34:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 12:34:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-23 12:34:22,686 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-11-23 12:34:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:22,686 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-23 12:34:22,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-23 12:34:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:34:22,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:22,688 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:22,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:22,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:22,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:34:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash -278993773, now seen corresponding path program 3 times [2021-11-23 12:34:22,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:22,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550024324] [2021-11-23 12:34:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:22,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:22,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:34:22,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243218720] [2021-11-23 12:34:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:34:22,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:22,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:22,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:22,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85f83f7a-e93d-45e2-b16b-4d3bfb1a8405/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process