./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --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_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/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_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/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_8fe07912-ebf9-4151-be6b-3f23c0914419/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 aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:49:28,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:49:28,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:49:28,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:49:28,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:49:28,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:49:28,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:49:28,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:49:28,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:49:28,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:49:28,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:49:28,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:49:28,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:49:28,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:49:28,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:49:28,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:49:28,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:49:28,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:49:28,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:49:28,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:49:28,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:49:28,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:49:28,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:49:28,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:49:28,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:49:28,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:49:28,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:49:28,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:49:28,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:49:28,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:49:28,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:49:28,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:49:28,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:49:28,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:49:28,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:49:28,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:49:28,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:49:28,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:49:28,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:49:28,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:49:28,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:49:28,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:49:28,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:49:28,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:49:28,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:49:28,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:49:28,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:49:28,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:49:28,150 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:49:28,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:49:28,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:49:28,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:49:28,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:49:28,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:49:28,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:49:28,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:49:28,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:49:28,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:49:28,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:49:28,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:49:28,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:49:28,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:49:28,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:49:28,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:49:28,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:49:28,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:49:28,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:49:28,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:49:28,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:49:28,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:49:28,154 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:49:28,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:49:28,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:49:28,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:49:28,155 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_8fe07912-ebf9-4151-be6b-3f23c0914419/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 [2021-11-23 13:49:28,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:49:28,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:49:28,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:49:28,455 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:49:28,456 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:49:28,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-11-23 13:49:28,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/data/4b731128c/12b647c99fb748cfa431899a13ecc986/FLAGfe60b2988 [2021-11-23 13:49:28,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:49:28,967 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-11-23 13:49:28,973 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/data/4b731128c/12b647c99fb748cfa431899a13ecc986/FLAGfe60b2988 [2021-11-23 13:49:29,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/data/4b731128c/12b647c99fb748cfa431899a13ecc986 [2021-11-23 13:49:29,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:49:29,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:49:29,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:49:29,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:49:29,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:49:29,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e0024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29, skipping insertion in model container [2021-11-23 13:49:29,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:49:29,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:49:29,590 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_8fe07912-ebf9-4151-be6b-3f23c0914419/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-11-23 13:49:29,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:49:29,601 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:49:29,623 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_8fe07912-ebf9-4151-be6b-3f23c0914419/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-11-23 13:49:29,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:49:29,638 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:49:29,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29 WrapperNode [2021-11-23 13:49:29,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:49:29,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:49:29,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:49:29,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:49:29,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,684 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2021-11-23 13:49:29,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:49:29,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:49:29,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:49:29,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:49:29,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:49:29,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:49:29,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:49:29,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:49:29,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (1/1) ... [2021-11-23 13:49:29,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:49:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:29,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:49:29,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:49:29,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:49:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:49:29,866 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:49:29,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:49:30,069 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:49:30,076 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:49:30,076 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-23 13:49:30,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:30 BoogieIcfgContainer [2021-11-23 13:49:30,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:49:30,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:49:30,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:49:30,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:49:30,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:49:29" (1/3) ... [2021-11-23 13:49:30,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6caef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:30, skipping insertion in model container [2021-11-23 13:49:30,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:29" (2/3) ... [2021-11-23 13:49:30,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6caef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:30, skipping insertion in model container [2021-11-23 13:49:30,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:30" (3/3) ... [2021-11-23 13:49:30,103 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-11-23 13:49:30,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:49:30,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:49:30,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:49:30,178 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 13:49:30,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:49:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 13:49:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:49:30,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:30,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:30,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-11-23 13:49:30,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:30,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796721075] [2021-11-23 13:49:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:30,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,463 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 13:49:30,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:30,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796721075] [2021-11-23 13:49:30,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796721075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:30,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:30,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:30,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952437790] [2021-11-23 13:49:30,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:30,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:30,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:30,508 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:30,553 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-11-23 13:49:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 13:49:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:30,567 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:49:30,567 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 13:49:30,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:30,584 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:30,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 13:49:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-23 13:49:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-11-23 13:49:30,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-11-23 13:49:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:30,625 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-11-23 13:49:30,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-11-23 13:49:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:49:30,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:30,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:30,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:49:30,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-11-23 13:49:30,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:30,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951912227] [2021-11-23 13:49:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:30,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:30,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951912227] [2021-11-23 13:49:30,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951912227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816140691] [2021-11-23 13:49:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:30,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:30,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:30,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:49:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:49:30,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:49:30,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:49:30,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816140691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:30,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:49:30,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 13:49:30,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932919013] [2021-11-23 13:49:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:30,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:30,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:30,935 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:30,991 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-11-23 13:49:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:30,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 13:49:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:30,993 INFO L225 Difference]: With dead ends: 57 [2021-11-23 13:49:30,993 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 13:49:30,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:30,996 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:30,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 13:49:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-23 13:49:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 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 13:49:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-23 13:49:31,004 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-11-23 13:49:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:31,004 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-23 13:49:31,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-23 13:49:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 13:49:31,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:31,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:31,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:31,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:31,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-11-23 13:49:31,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:31,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274807133] [2021-11-23 13:49:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:31,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:49:31,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274807133] [2021-11-23 13:49:31,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274807133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519022844] [2021-11-23 13:49:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:31,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:31,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:31,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:49:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:49:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:49:31,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:49:31,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519022844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:31,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:49:31,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 13:49:31,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774833207] [2021-11-23 13:49:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:31,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:31,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:31,458 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 13:49:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:31,470 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-11-23 13:49:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 13:49:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:31,472 INFO L225 Difference]: With dead ends: 46 [2021-11-23 13:49:31,472 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 13:49:31,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:31,474 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:31,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 13:49:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-23 13:49:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 13:49:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-11-23 13:49:31,481 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-11-23 13:49:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:31,481 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-11-23 13:49:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 13:49:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-11-23 13:49:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 13:49:31,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:31,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:31,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:31,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:31,702 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:31,703 INFO L85 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-11-23 13:49:31,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:31,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149322542] [2021-11-23 13:49:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:31,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:49:31,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149322542] [2021-11-23 13:49:31,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149322542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979739308] [2021-11-23 13:49:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:31,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:31,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:31,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:49:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:49:31,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 13:49:31,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:49:31,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979739308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:31,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:49:31,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 13:49:31,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330184090] [2021-11-23 13:49:31,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:31,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:31,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:31,927 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:31,974 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-11-23 13:49:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 13:49:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:31,976 INFO L225 Difference]: With dead ends: 78 [2021-11-23 13:49:31,977 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 13:49:31,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:31,978 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:31,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 13:49:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-23 13:49:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-11-23 13:49:31,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-11-23 13:49:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:31,988 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-11-23 13:49:31,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-11-23 13:49:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 13:49:31,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:31,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:32,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:32,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:32,213 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-11-23 13:49:32,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633025668] [2021-11-23 13:49:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:32,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:49:32,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633025668] [2021-11-23 13:49:32,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633025668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612997405] [2021-11-23 13:49:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:32,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:32,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:32,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:32,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:49:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:32,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:49:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:49:32,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:49:32,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612997405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:32,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:49:32,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:49:32,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795800074] [2021-11-23 13:49:32,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:32,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:49:32,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:49:32,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:32,505 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:32,530 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-11-23 13:49:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:49:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 13:49:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:32,532 INFO L225 Difference]: With dead ends: 93 [2021-11-23 13:49:32,532 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 13:49:32,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:32,534 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:32,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 13:49:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 13:49:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 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 13:49:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2021-11-23 13:49:32,542 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 30 [2021-11-23 13:49:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:32,542 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2021-11-23 13:49:32,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2021-11-23 13:49:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:49:32,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:32,544 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:32,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:32,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:32,759 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -195520200, now seen corresponding path program 2 times [2021-11-23 13:49:32,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:32,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182071192] [2021-11-23 13:49:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:32,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 13:49:32,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182071192] [2021-11-23 13:49:32,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182071192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311770940] [2021-11-23 13:49:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:49:32,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:32,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:32,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:49:32,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 13:49:32,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:32,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:49:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 13:49:33,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:49:33,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311770940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:33,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:49:33,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-11-23 13:49:33,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966165062] [2021-11-23 13:49:33,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:33,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:49:33,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:49:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:49:33,168 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:33,253 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-11-23 13:49:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:49:33,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 13:49:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:33,259 INFO L225 Difference]: With dead ends: 118 [2021-11-23 13:49:33,259 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 13:49:33,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:49:33,263 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:33,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 133 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 13:49:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-11-23 13:49:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 76 states have internal predecessors, (102), 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 13:49:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2021-11-23 13:49:33,283 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 36 [2021-11-23 13:49:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:33,284 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2021-11-23 13:49:33,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2021-11-23 13:49:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:49:33,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:33,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:33,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:33,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:33,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 570616873, now seen corresponding path program 1 times [2021-11-23 13:49:33,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:33,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291528900] [2021-11-23 13:49:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:33,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:33,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:33,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569355188] [2021-11-23 13:49:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:33,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:33,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:33,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:49:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:49:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:49:33,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:49:33,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291528900] [2021-11-23 13:49:33,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:49:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569355188] [2021-11-23 13:49:33,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569355188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:33,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:49:33,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-23 13:49:33,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697298229] [2021-11-23 13:49:33,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:33,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:49:33,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:49:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:33,769 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:33,790 INFO L93 Difference]: Finished difference Result 145 states and 195 transitions. [2021-11-23 13:49:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:49:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 13:49:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:33,793 INFO L225 Difference]: With dead ends: 145 [2021-11-23 13:49:33,793 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 13:49:33,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:33,794 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:33,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 130 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 13:49:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-23 13:49:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 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 13:49:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-11-23 13:49:33,803 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 39 [2021-11-23 13:49:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:33,804 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-11-23 13:49:33,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-11-23 13:49:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:49:33,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:33,805 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:33,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:34,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:34,034 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash 667539687, now seen corresponding path program 2 times [2021-11-23 13:49:34,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:34,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039470940] [2021-11-23 13:49:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:34,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:34,051 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:34,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677469564] [2021-11-23 13:49:34,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:49:34,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:34,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:34,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:34,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:49:34,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:49:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:49:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 13:49:34,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 13:49:34,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039470940] [2021-11-23 13:49:34,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:49:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677469564] [2021-11-23 13:49:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677469564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:34,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:49:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 13:49:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739638993] [2021-11-23 13:49:34,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:49:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:49:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:49:34,263 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 13:49:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:34,343 INFO L93 Difference]: Finished difference Result 175 states and 245 transitions. [2021-11-23 13:49:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:49:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 41 [2021-11-23 13:49:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:34,345 INFO L225 Difference]: With dead ends: 175 [2021-11-23 13:49:34,345 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 13:49:34,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:49:34,351 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:34,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 60 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:49:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 13:49:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2021-11-23 13:49:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 99 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-11-23 13:49:34,379 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 41 [2021-11-23 13:49:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:34,380 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-11-23 13:49:34,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 13:49:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-11-23 13:49:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:49:34,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:34,385 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:34,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 13:49:34,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 13:49:34,586 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1092210085, now seen corresponding path program 1 times [2021-11-23 13:49:34,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:34,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942529289] [2021-11-23 13:49:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:34,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:34,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:34,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022840621] [2021-11-23 13:49:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:34,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:34,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:34,615 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:34,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:49:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:34,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:49:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 13:49:34,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 13:49:34,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:34,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942529289] [2021-11-23 13:49:34,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:49:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022840621] [2021-11-23 13:49:34,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022840621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:34,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:49:34,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-23 13:49:34,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977157750] [2021-11-23 13:49:34,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:34,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:49:34,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:49:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:34,901 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 13:49:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:34,959 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2021-11-23 13:49:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:49:34,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 13:49:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:34,960 INFO L225 Difference]: With dead ends: 178 [2021-11-23 13:49:34,961 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 13:49:34,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:34,963 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:34,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 63 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 13:49:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-23 13:49:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 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 13:49:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-11-23 13:49:34,980 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 65 [2021-11-23 13:49:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:34,982 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-11-23 13:49:34,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 13:49:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-11-23 13:49:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:49:34,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:34,987 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:35,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:35,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:35,202 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:35,202 INFO L85 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 2 times [2021-11-23 13:49:35,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:35,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000697842] [2021-11-23 13:49:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:35,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:35,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375535574] [2021-11-23 13:49:35,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:49:35,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:35,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:35,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:49:35,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:49:35,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:35,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:49:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 13:49:35,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 13:49:35,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000697842] [2021-11-23 13:49:35,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:49:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375535574] [2021-11-23 13:49:35,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375535574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:35,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:49:35,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-23 13:49:35,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643625473] [2021-11-23 13:49:35,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:35,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:49:35,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:49:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:35,511 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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 13:49:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:35,596 INFO L93 Difference]: Finished difference Result 188 states and 227 transitions. [2021-11-23 13:49:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:49:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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) Word has length 65 [2021-11-23 13:49:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:35,599 INFO L225 Difference]: With dead ends: 188 [2021-11-23 13:49:35,600 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 13:49:35,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:35,602 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:35,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 60 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:49:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 13:49:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-23 13:49:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 114 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2021-11-23 13:49:35,614 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 65 [2021-11-23 13:49:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:35,614 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2021-11-23 13:49:35,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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 13:49:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2021-11-23 13:49:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 13:49:35,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:35,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:35,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:35,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:49:35,834 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -422485954, now seen corresponding path program 3 times [2021-11-23 13:49:35,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:35,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000701517] [2021-11-23 13:49:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:35,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:35,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:35,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944914120] [2021-11-23 13:49:35,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:49:35,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:35,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:35,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:49:35,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:49:35,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:49:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 13:49:36,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 13:49:36,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:36,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000701517] [2021-11-23 13:49:36,163 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:49:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944914120] [2021-11-23 13:49:36,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944914120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:36,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:49:36,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 13:49:36,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975467015] [2021-11-23 13:49:36,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:36,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:49:36,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:49:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:49:36,166 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:36,203 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2021-11-23 13:49:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:49:36,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 13:49:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:36,206 INFO L225 Difference]: With dead ends: 167 [2021-11-23 13:49:36,206 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 13:49:36,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:49:36,207 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:36,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 13:49:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-23 13:49:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 126 states have internal predecessors, (148), 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 13:49:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-11-23 13:49:36,215 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 74 [2021-11-23 13:49:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:36,217 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-11-23 13:49:36,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-11-23 13:49:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 13:49:36,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:36,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:36,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:36,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:36,434 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1620561476, now seen corresponding path program 4 times [2021-11-23 13:49:36,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488807081] [2021-11-23 13:49:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:36,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:36,449 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:36,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652108007] [2021-11-23 13:49:36,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:49:36,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:36,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:36,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:49:36,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:49:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:36,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:49:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 13:49:36,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:49:36,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488807081] [2021-11-23 13:49:36,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:49:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652108007] [2021-11-23 13:49:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652108007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:36,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:36,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:49:36,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053579581] [2021-11-23 13:49:36,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:36,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:49:36,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:49:36,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:36,683 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:36,716 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-11-23 13:49:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:49:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 13:49:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:36,718 INFO L225 Difference]: With dead ends: 186 [2021-11-23 13:49:36,719 INFO L226 Difference]: Without dead ends: 108 [2021-11-23 13:49:36,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:36,720 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:36,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 73 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-23 13:49:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-11-23 13:49:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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 13:49:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-11-23 13:49:36,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 80 [2021-11-23 13:49:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:36,727 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-11-23 13:49:36,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-11-23 13:49:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 13:49:36,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:36,731 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:36,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:36,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:36,946 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 1 times [2021-11-23 13:49:36,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:36,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647648185] [2021-11-23 13:49:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:36,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:36,957 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:49:36,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093866605] [2021-11-23 13:49:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:36,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:36,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:36,959 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:36,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:49:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:49:37,158 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 13:49:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:49:37,357 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 13:49:37,358 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 13:49:37,359 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 13:49:37,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:37,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:49:37,588 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 13:49:37,591 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:49:37,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:49:37 BoogieIcfgContainer [2021-11-23 13:49:37,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:49:37,700 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:49:37,700 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:49:37,700 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:49:37,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:30" (3/4) ... [2021-11-23 13:49:37,702 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 13:49:37,830 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:49:37,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:49:37,831 INFO L158 Benchmark]: Toolchain (without parser) took 8460.19ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 64.4MB in the beginning and 78.3MB in the end (delta: -13.9MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-11-23 13:49:37,832 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:49:37,832 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.54ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 72.8MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:49:37,832 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.31ms. Allocated memory is still 98.6MB. Free memory was 72.8MB in the beginning and 70.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:49:37,833 INFO L158 Benchmark]: Boogie Preprocessor took 29.99ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 69.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:49:37,834 INFO L158 Benchmark]: RCFGBuilder took 362.47ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 57.2MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:49:37,834 INFO L158 Benchmark]: TraceAbstraction took 7619.27ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 56.5MB in the beginning and 85.7MB in the end (delta: -29.1MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. [2021-11-23 13:49:37,835 INFO L158 Benchmark]: Witness Printer took 131.13ms. Allocated memory is still 119.5MB. Free memory was 85.7MB in the beginning and 78.3MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 13:49:37,839 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.54ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 72.8MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.31ms. Allocated memory is still 98.6MB. Free memory was 72.8MB in the beginning and 70.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.99ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 69.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 362.47ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 57.2MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7619.27ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 56.5MB in the beginning and 85.7MB in the end (delta: -29.1MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. * Witness Printer took 131.13ms. Allocated memory is still 119.5MB. Free memory was 85.7MB in the beginning and 78.3MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L43] CALL init_nondet(x) [L16] int i; [L17] i = 0 VAL [i=0, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=1, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=2, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=3, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=4, x={3:0}, x={3:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=5, x={3:0}, x={3:0}] [L17] COND FALSE !(i < 5) VAL [i=5, x={3:0}, x={3:0}] [L43] RET init_nondet(x) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L49] CALL, EXPR rangesum(x) [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483646, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483646, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483646, x={3:0}, x={3:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967293, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967293, x={3:0}, x={3:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967293, x={3:0}, x={3:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483646, cnt=2, i=5, ret=4294967293, x={3:0}, x={3:0}] [L49] RET, EXPR rangesum(x) [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L52] CALL, EXPR rangesum(x) [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483646, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483646, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483646, x={3:0}, x={3:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967293, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967293, x={3:0}, x={3:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967293, x={3:0}, x={3:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483646, cnt=2, i=5, ret=4294967293, x={3:0}, x={3:0}] [L52] RET, EXPR rangesum(x) [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; VAL [i=0, ret=2147483646, ret2=2147483646, temp=-2147483642, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=1, ret=2147483646, ret2=2147483646, temp=-2147483642, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=2, ret=2147483646, ret2=2147483646, temp=-2147483642, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=3, ret=2147483646, ret2=2147483646, temp=-2147483642, x={3:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=4, ret=2147483646, ret2=2147483646, temp=-2147483642, x={3:0}] [L54] COND FALSE !(i<5 -1) VAL [i=4, ret=2147483646, ret2=2147483646, temp=-2147483642, x={3:0}] [L57] x[5 -1] = temp [L58] CALL, EXPR rangesum(x) [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483647, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483647, x={3:0}, x={3:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483647, x={3:0}, x={3:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=5, x={3:0}, x={3:0}] [L28] i++ VAL [cnt=2, i=5, ret=5, x={3:0}, x={3:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=5, x={3:0}, x={3:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2, cnt=2, i=5, ret=5, x={3:0}, x={3:0}] [L58] RET, EXPR rangesum(x) [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=2147483646, ret2=2147483646, ret5=2, temp=-2147483642, x={3:0}] [L61] reach_error() VAL [i=4, ret=2147483646, ret2=2147483646, ret5=2, temp=-2147483642, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 13, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 264 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 264 mSDsluCounter, 982 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 598 mSDsCounter, 128 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 298 IncrementalHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 128 mSolverCounterUnsat, 384 mSDtfsCounter, 298 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 778 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=11, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 93 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 747 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 958 ConstructedInterpolants, 0 QuantifiedInterpolants, 1290 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1838 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 864/965 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 13:49:37,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fe07912-ebf9-4151-be6b-3f23c0914419/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE