./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer --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 dd8d8af301e4791886ec1ff9f4a142cca0e3e497 .......................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer --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 dd8d8af301e4791886ec1ff9f4a142cca0e3e497 .................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:25:32,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:25:32,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:25:32,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:25:32,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:25:32,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:25:32,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:25:32,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:25:32,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:25:32,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:25:32,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:25:32,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:25:32,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:25:32,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:25:32,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:25:32,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:25:32,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:25:32,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:25:32,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:25:32,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:25:32,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:25:32,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:25:32,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:25:32,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:25:32,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:25:32,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:25:32,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:25:32,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:25:32,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:25:32,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:25:32,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:25:32,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:25:32,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:25:32,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:25:32,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:25:32,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:25:32,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:25:32,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:25:32,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:25:32,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:25:32,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:25:32,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:25:32,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:25:32,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:25:32,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:25:32,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:25:32,559 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:25:32,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:25:32,559 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:25:32,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:25:32,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:25:32,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:25:32,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:25:32,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:25:32,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:25:32,562 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:25:32,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:25:32,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:25:32,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:25:32,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:25:32,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:25:32,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:25:32,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:25:32,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:25:32,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:25:32,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:25:32,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:25:32,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:25:32,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:25:32,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:25:32,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:25:32,567 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-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd8d8af301e4791886ec1ff9f4a142cca0e3e497 [2020-11-29 19:25:32,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:25:33,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:25:33,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:25:33,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:25:33,028 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:25:33,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2020-11-29 19:25:33,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/f0fb45805/a15cae5e13bc4a0baafb958c49993fbc/FLAG45b6466ba [2020-11-29 19:25:33,847 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:25:33,848 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2020-11-29 19:25:33,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/f0fb45805/a15cae5e13bc4a0baafb958c49993fbc/FLAG45b6466ba [2020-11-29 19:25:34,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/f0fb45805/a15cae5e13bc4a0baafb958c49993fbc [2020-11-29 19:25:34,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:25:34,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:25:34,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:25:34,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:25:34,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:25:34,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307a3428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34, skipping insertion in model container [2020-11-29 19:25:34,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:25:34,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:25:34,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:25:34,502 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:25:34,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:25:34,548 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:25:34,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34 WrapperNode [2020-11-29 19:25:34,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:25:34,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:25:34,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:25:34,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:25:34,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:25:34,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:25:34,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:25:34,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:25:34,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... [2020-11-29 19:25:34,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:25:34,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:25:34,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:25:34,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:25:34,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:25:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:25:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:25:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:25:34,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:25:35,108 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:25:35,109 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-29 19:25:35,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:25:35 BoogieIcfgContainer [2020-11-29 19:25:35,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:25:35,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:25:35,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:25:35,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:25:35,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:25:34" (1/3) ... [2020-11-29 19:25:35,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533dd55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:25:35, skipping insertion in model container [2020-11-29 19:25:35,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:34" (2/3) ... [2020-11-29 19:25:35,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533dd55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:25:35, skipping insertion in model container [2020-11-29 19:25:35,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:25:35" (3/3) ... [2020-11-29 19:25:35,130 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2020-11-29 19:25:35,145 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:25:35,182 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 19:25:35,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 19:25:35,238 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:25:35,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:25:35,245 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:25:35,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:25:35,246 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:25:35,246 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:25:35,246 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:25:35,246 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:25:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-29 19:25:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:25:35,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:25:35,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:25:35,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:25:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:25:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash 891015143, now seen corresponding path program 1 times [2020-11-29 19:25:35,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:25:35,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289070357] [2020-11-29 19:25:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:25:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:25:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:25:35,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289070357] [2020-11-29 19:25:35,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:25:35,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:25:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934944755] [2020-11-29 19:25:35,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:25:35,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:25:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:25:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:25:35,484 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-29 19:25:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:25:35,507 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-11-29 19:25:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:25:35,509 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 19:25:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:25:35,520 INFO L225 Difference]: With dead ends: 62 [2020-11-29 19:25:35,520 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 19:25:35,524 INFO L677 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 [2020-11-29 19:25:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 19:25:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 19:25:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:25:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 19:25:35,567 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-11-29 19:25:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:25:35,568 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 19:25:35,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:25:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 19:25:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:25:35,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:25:35,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:25:35,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:25:35,571 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:25:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:25:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 19:25:35,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:25:35,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685854943] [2020-11-29 19:25:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:25:35,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:25:35,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244042353] [2020-11-29 19:25:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:25:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:25:35,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:25:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:25:35,755 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:25:35,781 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:25:35,781 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:25:36,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:25:36,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:25:36 BoogieIcfgContainer [2020-11-29 19:25:36,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:25:36,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:25:36,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:25:36,053 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:25:36,053 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:25:35" (3/4) ... [2020-11-29 19:25:36,057 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:25:36,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:25:36,063 INFO L168 Benchmark]: Toolchain (without parser) took 1869.55 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 63.9 MB in the beginning and 71.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:25:36,064 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 94.4 MB. Free memory is still 52.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:25:36,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.43 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 63.9 MB in the beginning and 116.5 MB in the end (delta: -52.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:25:36,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.56 ms. Allocated memory is still 140.5 MB. Free memory was 115.8 MB in the beginning and 114.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:25:36,068 INFO L168 Benchmark]: Boogie Preprocessor took 33.07 ms. Allocated memory is still 140.5 MB. Free memory was 114.5 MB in the beginning and 113.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:25:36,070 INFO L168 Benchmark]: RCFGBuilder took 476.76 ms. Allocated memory is still 140.5 MB. Free memory was 113.0 MB in the beginning and 98.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:25:36,071 INFO L168 Benchmark]: TraceAbstraction took 937.32 ms. Allocated memory is still 140.5 MB. Free memory was 98.3 MB in the beginning and 71.7 MB in the end (delta: 26.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:25:36,074 INFO L168 Benchmark]: Witness Printer took 5.41 ms. Allocated memory is still 140.5 MB. Free memory was 71.7 MB in the beginning and 71.0 MB in the end (delta: 677.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:25:36,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 94.4 MB. Free memory is still 52.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.43 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 63.9 MB in the beginning and 116.5 MB in the end (delta: -52.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.56 ms. Allocated memory is still 140.5 MB. Free memory was 115.8 MB in the beginning and 114.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.07 ms. Allocated memory is still 140.5 MB. Free memory was 114.5 MB in the beginning and 113.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 476.76 ms. Allocated memory is still 140.5 MB. Free memory was 113.0 MB in the beginning and 98.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 937.32 ms. Allocated memory is still 140.5 MB. Free memory was 98.3 MB in the beginning and 71.7 MB in the end (delta: 26.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.41 ms. Allocated memory is still 140.5 MB. Free memory was 71.7 MB in the beginning and 71.0 MB in the end (delta: 677.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<50 [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire2.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:25:39,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:25:39,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:25:39,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:25:39,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:25:39,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:25:39,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:25:39,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:25:39,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:25:39,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:25:39,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:25:39,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:25:39,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:25:39,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:25:39,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:25:39,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:25:39,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:25:39,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:25:39,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:25:39,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:25:39,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:25:39,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:25:39,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:25:39,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:25:39,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:25:39,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:25:39,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:25:39,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:25:39,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:25:39,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:25:39,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:25:39,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:25:39,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:25:39,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:25:39,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:25:39,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:25:39,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:25:39,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:25:39,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:25:39,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:25:39,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:25:39,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 19:25:39,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:25:39,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:25:39,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:25:39,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:25:39,316 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:25:39,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:25:39,317 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:25:39,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:25:39,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:25:39,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:25:39,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:25:39,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:25:39,319 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:25:39,319 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:25:39,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:25:39,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:25:39,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:25:39,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:25:39,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:25:39,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:25:39,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:25:39,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:25:39,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:25:39,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:25:39,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:25:39,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:25:39,323 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:25:39,323 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:25:39,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:25:39,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:25:39,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:25:39,338 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd8d8af301e4791886ec1ff9f4a142cca0e3e497 [2020-11-29 19:25:39,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:25:39,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:25:39,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:25:39,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:25:39,841 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:25:39,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2020-11-29 19:25:39,940 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/3d121d5e3/2e4e80dc36c141c8914b45da5b6f5b10/FLAG943ae4512 [2020-11-29 19:25:40,673 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:25:40,678 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2020-11-29 19:25:40,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/3d121d5e3/2e4e80dc36c141c8914b45da5b6f5b10/FLAG943ae4512 [2020-11-29 19:25:41,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/data/3d121d5e3/2e4e80dc36c141c8914b45da5b6f5b10 [2020-11-29 19:25:41,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:25:41,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:25:41,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:25:41,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:25:41,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:25:41,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1afa90ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41, skipping insertion in model container [2020-11-29 19:25:41,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:25:41,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:25:41,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:25:41,405 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:25:41,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:25:41,552 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:25:41,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41 WrapperNode [2020-11-29 19:25:41,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:25:41,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:25:41,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:25:41,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:25:41,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:25:41,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:25:41,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:25:41,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:25:41,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... [2020-11-29 19:25:41,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:25:41,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:25:41,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:25:41,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:25:41,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:25:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:25:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:25:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:25:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:25:52,571 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:25:52,573 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-29 19:25:52,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:25:52 BoogieIcfgContainer [2020-11-29 19:25:52,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:25:52,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:25:52,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:25:52,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:25:52,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:25:41" (1/3) ... [2020-11-29 19:25:52,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1772bd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:25:52, skipping insertion in model container [2020-11-29 19:25:52,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:25:41" (2/3) ... [2020-11-29 19:25:52,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1772bd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:25:52, skipping insertion in model container [2020-11-29 19:25:52,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:25:52" (3/3) ... [2020-11-29 19:25:52,589 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2020-11-29 19:25:52,603 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:25:52,608 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 19:25:52,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 19:25:52,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:25:52,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:25:52,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:25:52,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:25:52,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:25:52,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:25:52,654 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:25:52,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:25:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-29 19:25:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:25:52,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:25:52,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:25:52,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:25:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:25:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash 891015143, now seen corresponding path program 1 times [2020-11-29 19:25:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:25:52,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834458382] [2020-11-29 19:25:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 19:25:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:25:52,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 19:25:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:25:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:25:52,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:25:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:25:52,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834458382] [2020-11-29 19:25:52,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:25:52,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 19:25:52,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496604848] [2020-11-29 19:25:52,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:25:52,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:25:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:25:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:25:52,958 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-29 19:25:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:25:52,976 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-11-29 19:25:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:25:52,978 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 19:25:52,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:25:52,986 INFO L225 Difference]: With dead ends: 62 [2020-11-29 19:25:52,987 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 19:25:52,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:25:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 19:25:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 19:25:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:25:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 19:25:53,024 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-11-29 19:25:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:25:53,024 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 19:25:53,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:25:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 19:25:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:25:53,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:25:53,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:25:53,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:25:53,247 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:25:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:25:53,248 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 19:25:53,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:25:53,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828583810] [2020-11-29 19:25:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 19:25:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:25:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:25:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:25:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:25:53,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:25:57,180 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-29 19:25:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:25:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828583810] [2020-11-29 19:25:57,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:25:57,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-29 19:25:57,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163676445] [2020-11-29 19:25:57,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:25:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:25:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:25:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:25:57,204 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-11-29 19:26:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:26:20,670 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-11-29 19:26:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:26:20,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-11-29 19:26:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:26:20,673 INFO L225 Difference]: With dead ends: 47 [2020-11-29 19:26:20,673 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 19:26:20,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:26:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 19:26:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-11-29 19:26:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 19:26:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-29 19:26:20,685 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2020-11-29 19:26:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:26:20,686 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-29 19:26:20,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:26:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-29 19:26:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 19:26:20,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:26:20,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:26:20,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:26:20,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:26:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:26:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash 179688749, now seen corresponding path program 1 times [2020-11-29 19:26:20,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:26:20,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356797567] [2020-11-29 19:26:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-29 19:26:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:26:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:26:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:26:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:26:23,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:26:25,404 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) is different from false [2020-11-29 19:26:33,071 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-11-29 19:26:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:26:33,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356797567] [2020-11-29 19:26:33,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:26:33,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-29 19:26:33,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435195939] [2020-11-29 19:26:33,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:26:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:26:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:26:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2020-11-29 19:26:33,078 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-11-29 19:26:40,262 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification that was a NOOP. DAG size: 14 [2020-11-29 19:26:46,494 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_11 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) v_ULTIMATE.start_main_~a~0_11))) (fp.sub c_currentRoundingMode .cse0 .cse0))) (_ bv0 32))) (= (_ bv1 32) c_ULTIMATE.start_main_~r~0) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse1 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2020-11-29 19:26:48,962 WARN L860 $PredicateComparison]: unable to prove that (and (= (_ bv1 32) c_ULTIMATE.start_main_~r~0) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2020-11-29 19:27:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:27:27,307 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-29 19:27:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:27:27,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-29 19:27:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:27:27,333 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:27:27,333 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 19:27:27,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=26, Invalid=55, Unknown=3, NotChecked=48, Total=132 [2020-11-29 19:27:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 19:27:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-11-29 19:27:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:27:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-29 19:27:27,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-11-29 19:27:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:27:27,345 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-29 19:27:27,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:27:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-29 19:27:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:27:27,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:27:27,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:27:27,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 19:27:27,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:27:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:27:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1251711063, now seen corresponding path program 1 times [2020-11-29 19:27:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:27:27,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837650917] [2020-11-29 19:27:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 19:27:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:27:28,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:27:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:27:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:27:28,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:27:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:27:28,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837650917] [2020-11-29 19:27:28,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:27:28,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-29 19:27:28,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011956575] [2020-11-29 19:27:28,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:27:28,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:27:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:27:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:27:28,146 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2020-11-29 19:27:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:27:29,427 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-11-29 19:27:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:27:29,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-29 19:27:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:27:29,430 INFO L225 Difference]: With dead ends: 64 [2020-11-29 19:27:29,430 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:27:29,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:27:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:27:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-11-29 19:27:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:27:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-11-29 19:27:29,444 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2020-11-29 19:27:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:27:29,445 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-11-29 19:27:29,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:27:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-11-29 19:27:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:27:29,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:27:29,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:27:29,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 19:27:29,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:27:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:27:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash 882382672, now seen corresponding path program 1 times [2020-11-29 19:27:29,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:27:29,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978112068] [2020-11-29 19:27:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-29 19:27:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:27:31,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:28:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:28:56,047 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:28:56,699 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:28:56,700 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:28:56,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 19:28:56,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:28:56 BoogieIcfgContainer [2020-11-29 19:28:56,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:28:56,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:28:56,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:28:56,939 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:28:56,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:25:52" (3/4) ... [2020-11-29 19:28:56,942 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:28:57,018 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1086d11d-bda6-4abc-8b69-f109d3230d16/bin/uautomizer/witness.graphml [2020-11-29 19:28:57,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:28:57,025 INFO L168 Benchmark]: Toolchain (without parser) took 195981.46 ms. Allocated memory is still 73.4 MB. Free memory was 58.6 MB in the beginning and 49.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:28:57,025 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 73.4 MB. Free memory is still 56.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:28:57,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 505.93 ms. Allocated memory is still 73.4 MB. Free memory was 58.3 MB in the beginning and 56.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:28:57,029 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.38 ms. Allocated memory is still 73.4 MB. Free memory was 56.5 MB in the beginning and 54.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:28:57,030 INFO L168 Benchmark]: Boogie Preprocessor took 40.33 ms. Allocated memory is still 73.4 MB. Free memory was 54.8 MB in the beginning and 53.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:28:57,032 INFO L168 Benchmark]: RCFGBuilder took 10929.07 ms. Allocated memory is still 73.4 MB. Free memory was 53.3 MB in the beginning and 37.8 MB in the end (delta: 15.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:28:57,034 INFO L168 Benchmark]: TraceAbstraction took 184358.13 ms. Allocated memory is still 73.4 MB. Free memory was 37.3 MB in the beginning and 51.1 MB in the end (delta: -13.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:28:57,034 INFO L168 Benchmark]: Witness Printer took 84.65 ms. Allocated memory is still 73.4 MB. Free memory was 51.1 MB in the beginning and 49.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:28:57,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 73.4 MB. Free memory is still 56.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 505.93 ms. Allocated memory is still 73.4 MB. Free memory was 58.3 MB in the beginning and 56.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.38 ms. Allocated memory is still 73.4 MB. Free memory was 56.5 MB in the beginning and 54.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.33 ms. Allocated memory is still 73.4 MB. Free memory was 54.8 MB in the beginning and 53.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 10929.07 ms. Allocated memory is still 73.4 MB. Free memory was 53.3 MB in the beginning and 37.8 MB in the end (delta: 15.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 184358.13 ms. Allocated memory is still 73.4 MB. Free memory was 37.3 MB in the beginning and 51.1 MB in the end (delta: -13.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 84.65 ms. Allocated memory is still 73.4 MB. Free memory was 51.1 MB in the beginning and 49.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<50 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire2.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 184.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 79.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 89 SDslu, 170 SDs, 0 SdLazy, 116 SolverSat, 28 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 63.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 27.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 26 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 14.6s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 2130 SizeOfPredicates, 11 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...