./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/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_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/indp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/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_d32d7d9d-e46a-4df8-b98b-c237f5464394/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 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:38:00,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:38:00,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:38:00,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:38:00,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:38:00,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:38:00,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:38:00,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:38:00,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:38:00,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:38:00,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:38:00,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:38:00,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:38:00,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:38:00,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:38:00,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:38:00,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:38:00,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:38:00,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:38:00,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:38:00,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:38:00,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:38:00,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:38:00,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:38:00,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:38:00,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:38:00,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:38:00,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:38:00,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:38:00,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:38:00,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:38:00,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:38:00,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:38:00,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:38:00,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:38:00,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:38:00,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:38:00,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:38:00,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:38:00,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:38:00,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:38:00,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:38:00,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:38:00,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:38:00,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:38:00,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:38:00,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:38:00,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:38:00,571 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:38:00,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:38:00,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:38:00,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:38:00,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:38:00,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:38:00,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:38:00,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:38:00,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:38:00,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:38:00,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:38:00,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:38:00,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:38:00,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:38:00,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:38:00,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:38:00,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:38:00,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:38:00,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:38:00,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:38:00,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:38:00,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:38:00,580 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:38:00,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:38:00,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:38:00,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:38:00,583 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_d32d7d9d-e46a-4df8-b98b-c237f5464394/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 [2021-11-23 13:38:00,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:38:00,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:38:00,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:38:00,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:38:00,980 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:38:00,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-fpi/indp2.c [2021-11-23 13:38:01,083 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/data/f6f30e1c1/089cb84a59f541618911998290bb434f/FLAGebb3b1299 [2021-11-23 13:38:01,789 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:38:01,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/sv-benchmarks/c/array-fpi/indp2.c [2021-11-23 13:38:01,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/data/f6f30e1c1/089cb84a59f541618911998290bb434f/FLAGebb3b1299 [2021-11-23 13:38:02,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/data/f6f30e1c1/089cb84a59f541618911998290bb434f [2021-11-23 13:38:02,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:38:02,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:38:02,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:38:02,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:38:02,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:38:02,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14bb2821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02, skipping insertion in model container [2021-11-23 13:38:02,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:38:02,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:38:02,437 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_d32d7d9d-e46a-4df8-b98b-c237f5464394/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2021-11-23 13:38:02,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:38:02,488 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:38:02,507 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_d32d7d9d-e46a-4df8-b98b-c237f5464394/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2021-11-23 13:38:02,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:38:02,560 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:38:02,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02 WrapperNode [2021-11-23 13:38:02,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:38:02,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:38:02,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:38:02,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:38:02,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,624 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-23 13:38:02,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:38:02,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:38:02,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:38:02,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:38:02,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:38:02,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:38:02,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:38:02,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:38:02,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (1/1) ... [2021-11-23 13:38:02,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:38:02,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:02,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:38:02,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:38:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:38:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:38:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:38:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:38:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:38:02,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:38:02,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:38:02,922 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:38:02,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:38:03,159 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:38:03,168 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:38:03,168 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 13:38:03,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:38:03 BoogieIcfgContainer [2021-11-23 13:38:03,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:38:03,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:38:03,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:38:03,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:38:03,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:38:02" (1/3) ... [2021-11-23 13:38:03,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ad1878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:38:03, skipping insertion in model container [2021-11-23 13:38:03,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:02" (2/3) ... [2021-11-23 13:38:03,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ad1878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:38:03, skipping insertion in model container [2021-11-23 13:38:03,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:38:03" (3/3) ... [2021-11-23 13:38:03,183 INFO L111 eAbstractionObserver]: Analyzing ICFG indp2.c [2021-11-23 13:38:03,191 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:38:03,191 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:38:03,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:38:03,324 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 13:38:03,325 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:38:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:38:03,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:03,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:03,376 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:38:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-11-23 13:38:03,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:03,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657910803] [2021-11-23 13:38:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:03,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:03,654 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 13:38:03,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657910803] [2021-11-23 13:38:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657910803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:03,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:03,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:38:03,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500602281] [2021-11-23 13:38:03,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:03,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:38:03,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:38:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:38:03,720 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:03,747 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-11-23 13:38:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:38:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:38:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:03,762 INFO L225 Difference]: With dead ends: 44 [2021-11-23 13:38:03,764 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 13:38:03,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:38:03,779 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:03,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:38:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 13:38:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 13:38:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 13:38:03,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-11-23 13:38:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:03,832 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 13:38:03,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 13:38:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:38:03,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:03,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:03,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:38:03,836 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:38:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-11-23 13:38:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817576509] [2021-11-23 13:38:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:03,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:03,994 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 13:38:03,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817576509] [2021-11-23 13:38:04,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817576509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:04,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:04,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:38:04,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127743496] [2021-11-23 13:38:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:04,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:38:04,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:38:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:38:04,017 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:04,111 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-23 13:38:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:38:04,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:38:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:04,114 INFO L225 Difference]: With dead ends: 45 [2021-11-23 13:38:04,114 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 13:38:04,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:38:04,117 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:04,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:38:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 13:38:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-23 13:38:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 13:38:04,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-23 13:38:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 13:38:04,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 13:38:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:38:04,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:04,130 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] [2021-11-23 13:38:04,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:38:04,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:38:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:04,131 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-11-23 13:38:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885415837] [2021-11-23 13:38:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:04,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:04,153 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:38:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556191816] [2021-11-23 13:38:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:04,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:04,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:04,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:04,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:38:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:38:04,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:38:04,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 13:38:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 13:38:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:04,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:05,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 13:38:05,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 13:38:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:38:05,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:05,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885415837] [2021-11-23 13:38:05,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:38:05,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556191816] [2021-11-23 13:38:05,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556191816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:05,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:38:05,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-23 13:38:05,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803692549] [2021-11-23 13:38:05,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:05,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:05,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:05,121 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:05,529 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-11-23 13:38:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:38:05,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:38:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:05,535 INFO L225 Difference]: With dead ends: 70 [2021-11-23 13:38:05,536 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 13:38:05,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:38:05,543 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:05,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 80 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:38:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 13:38:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 32. [2021-11-23 13:38:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-23 13:38:05,567 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2021-11-23 13:38:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:05,568 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-23 13:38:05,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-23 13:38:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 13:38:05,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:05,571 INFO L514 BasicCegarLoop]: trace histogram [2, 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 13:38:05,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 13:38:05,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:05,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:38:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2021-11-23 13:38:05,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:05,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858166077] [2021-11-23 13:38:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:05,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:38:05,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473030249] [2021-11-23 13:38:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:05,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:05,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:05,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:38:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:38:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:38:06,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:38:06,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:06,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858166077] [2021-11-23 13:38:06,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:38:06,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473030249] [2021-11-23 13:38:06,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473030249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:06,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:38:06,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 13:38:06,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152525027] [2021-11-23 13:38:06,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:06,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:38:06,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:38:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:38:06,211 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 13:38:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:06,427 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2021-11-23 13:38:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:38:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 24 [2021-11-23 13:38:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:06,429 INFO L225 Difference]: With dead ends: 88 [2021-11-23 13:38:06,430 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 13:38:06,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:38:06,432 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:06,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:38:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 13:38:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-11-23 13:38:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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 13:38:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-23 13:38:06,443 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2021-11-23 13:38:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:06,443 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-23 13:38:06,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 13:38:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-23 13:38:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 13:38:06,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:06,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:06,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:06,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:06,667 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:38:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2021-11-23 13:38:06,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:06,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865432646] [2021-11-23 13:38:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:06,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:06,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:38:06,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636282647] [2021-11-23 13:38:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:38:06,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:06,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:06,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:06,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:38:06,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:38:06,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:38:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 13:38:06,899 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 13:38:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-11-23 13:38:06,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-23 13:38:07,032 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-23 13:38:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2021-11-23 13:38:07,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-11-23 13:38:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:07,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:07,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 13:38:07,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-23 13:38:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:38:07,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865432646] [2021-11-23 13:38:07,631 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:38:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636282647] [2021-11-23 13:38:07,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636282647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:07,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:38:07,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-11-23 13:38:07,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817121910] [2021-11-23 13:38:07,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:07,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:38:07,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:38:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:38:07,637 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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 13:38:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:07,643 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-23 13:38:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:38:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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 13:38:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:07,647 INFO L225 Difference]: With dead ends: 36 [2021-11-23 13:38:07,647 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 13:38:07,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:38:07,651 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:07,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:38:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 13:38:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 13:38:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 13:38:07,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-11-23 13:38:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:07,656 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 13:38:07,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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 13:38:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 13:38:07,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 13:38:07,660 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 13:38:07,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:07,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:07,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 13:38:08,033 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 35 38) no Hoare annotation was computed. [2021-11-23 13:38:08,033 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 38) the Hoare annotation is: (let ((.cse0 (= (+ (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) 1) 0)) (.cse1 (= |ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse2 (<= 1 ~N~0)) (.cse3 (<= ~N~0 1))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~i~0#1| 0) .cse2 .cse3) (and .cse0 .cse1 (<= 1 |ULTIMATE.start_main_~i~0#1|) .cse2 .cse3 (<= |ULTIMATE.start_main_~i~0#1| 1)))) [2021-11-23 13:38:08,033 INFO L858 garLoopResultBuilder]: For program point L35-4(lines 35 38) no Hoare annotation was computed. [2021-11-23 13:38:08,034 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-11-23 13:38:08,034 INFO L858 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-11-23 13:38:08,034 INFO L858 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-11-23 13:38:08,034 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 43) no Hoare annotation was computed. [2021-11-23 13:38:08,034 INFO L854 garLoopResultBuilder]: At program point L40-3(lines 40 43) the Hoare annotation is: (and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (= (select (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) |ULTIMATE.start_main_~a~0#1.offset|) 0)) [2021-11-23 13:38:08,034 INFO L858 garLoopResultBuilder]: For program point L40-4(lines 40 43) no Hoare annotation was computed. [2021-11-23 13:38:08,035 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-23 13:38:08,035 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 13:38:08,035 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-23 13:38:08,035 INFO L858 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-11-23 13:38:08,035 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-11-23 13:38:08,035 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-11-23 13:38:08,036 INFO L858 garLoopResultBuilder]: For program point L45-2(lines 45 48) no Hoare annotation was computed. [2021-11-23 13:38:08,036 INFO L854 garLoopResultBuilder]: At program point L45-3(lines 45 48) the Hoare annotation is: (let ((.cse0 (<= 1 ~N~0)) (.cse1 (<= ~N~0 1))) (or (and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) .cse0 (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) 0) .cse1) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~i~0#1| 1)))) [2021-11-23 13:38:08,036 INFO L858 garLoopResultBuilder]: For program point L45-4(lines 45 48) no Hoare annotation was computed. [2021-11-23 13:38:08,036 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 13:38:08,036 INFO L861 garLoopResultBuilder]: At program point L50(lines 21 51) the Hoare annotation is: true [2021-11-23 13:38:08,036 INFO L858 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-11-23 13:38:08,037 INFO L858 garLoopResultBuilder]: For program point L30-2(lines 30 33) no Hoare annotation was computed. [2021-11-23 13:38:08,037 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 33) the Hoare annotation is: false [2021-11-23 13:38:08,037 INFO L858 garLoopResultBuilder]: For program point L30-4(lines 30 33) no Hoare annotation was computed. [2021-11-23 13:38:08,041 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2021-11-23 13:38:08,044 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:38:08,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:38:08 BoogieIcfgContainer [2021-11-23 13:38:08,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:38:08,067 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:38:08,067 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:38:08,068 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:38:08,068 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:38:03" (3/4) ... [2021-11-23 13:38:08,072 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 13:38:08,085 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-23 13:38:08,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 13:38:08,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 13:38:08,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 13:38:08,129 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:38:08,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:38:08,131 INFO L158 Benchmark]: Toolchain (without parser) took 6032.26ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 70.5MB in the beginning and 72.2MB in the end (delta: -1.7MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2021-11-23 13:38:08,131 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 92.3MB. Free memory was 65.8MB in the beginning and 65.7MB in the end (delta: 50.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:38:08,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.55ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 66.7MB in the end (delta: 3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:38:08,132 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.17ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 65.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:38:08,133 INFO L158 Benchmark]: Boogie Preprocessor took 66.78ms. Allocated memory is still 92.3MB. Free memory was 65.1MB in the beginning and 64.0MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 13:38:08,134 INFO L158 Benchmark]: RCFGBuilder took 477.75ms. Allocated memory is still 92.3MB. Free memory was 63.7MB in the beginning and 53.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 13:38:08,134 INFO L158 Benchmark]: TraceAbstraction took 4893.31ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 52.8MB in the beginning and 74.3MB in the end (delta: -21.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 13:38:08,135 INFO L158 Benchmark]: Witness Printer took 62.78ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 72.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:38:08,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 92.3MB. Free memory was 65.8MB in the beginning and 65.7MB in the end (delta: 50.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.55ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 66.7MB in the end (delta: 3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.17ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 65.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 66.78ms. Allocated memory is still 92.3MB. Free memory was 65.1MB in the beginning and 64.0MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 477.75ms. Allocated memory is still 92.3MB. Free memory was 63.7MB in the beginning and 53.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4893.31ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 52.8MB in the beginning and 74.3MB in the end (delta: -21.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Witness Printer took 62.78ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 72.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.7s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 135 mSDsluCounter, 170 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 104 mSDsCounter, 105 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 246 IncrementalHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 105 mSolverCounterUnsat, 66 mSDtfsCounter, 246 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 30, 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, 5 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 12 NumberOfFragments, 123 HoareAnnotationTreeSize, 5 FomulaSimplifications, 173 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 1158 SizeOfPredicates, 27 NumberOfNonLiveVariables, 262 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 10/44 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((a == 0 && 1 <= N) && N <= 1) && i == i * i) && unknown-#memory_int-unknown[a][a + i * 8 := unknown-#memory_int-unknown[a][a + i * 8] + 1][a] == 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((((a == 0 && i == 0) && 1 <= N) && unknown-#memory_int-unknown[a][a] == 0) && N <= 1) || (((1 <= i && 1 <= N) && N <= 1) && i <= 1) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((unknown-#memory_int-unknown[a][a] + 1 == 0 && a == 0) && i == 0) && 1 <= N) && N <= 1) || (((((unknown-#memory_int-unknown[a][a] + 1 == 0 && a == 0) && 1 <= i) && 1 <= N) && N <= 1) && i <= 1) RESULT: Ultimate proved your program to be correct! [2021-11-23 13:38:08,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d32d7d9d-e46a-4df8-b98b-c237f5464394/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 Result: TRUE