./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:58:09,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:09,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:09,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:09,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:09,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:09,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:09,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:09,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:09,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:09,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:09,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:09,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:09,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:09,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:09,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:09,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:09,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:09,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:09,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:09,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:09,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:09,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:09,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:09,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:09,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:09,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:09,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:09,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:09,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:09,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:09,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:09,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:09,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:09,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:09,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:09,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:09,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:09,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:09,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:09,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:09,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-28 02:58:09,411 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:09,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:09,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:09,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:09,413 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:09,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:09,413 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:58:09,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:09,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:09,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:09,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:09,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:09,415 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 02:58:09,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:09,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:09,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:09,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:09,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:09,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:09,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:09,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:09,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:09,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:09,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:09,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:09,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:09,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:09,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:09,418 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_fae93769-5af2-474d-abe6-3b331d3f4b1d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 [2020-11-28 02:58:09,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:09,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:09,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:09,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:09,720 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:09,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-11-28 02:58:09,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/data/6d0db484b/ab54ed6dc7ba436e9e72401a49e92202/FLAGc445eef9d [2020-11-28 02:58:10,206 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:10,206 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-11-28 02:58:10,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/data/6d0db484b/ab54ed6dc7ba436e9e72401a49e92202/FLAGc445eef9d [2020-11-28 02:58:10,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/data/6d0db484b/ab54ed6dc7ba436e9e72401a49e92202 [2020-11-28 02:58:10,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:10,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:10,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:10,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:10,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:10,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef46ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10, skipping insertion in model container [2020-11-28 02:58:10,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:10,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:10,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:10,823 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:10,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:10,892 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:10,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10 WrapperNode [2020-11-28 02:58:10,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:10,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:10,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:10,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:10,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:10,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:10,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:10,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:10,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... [2020-11-28 02:58:10,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:10,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:10,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:10,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:10,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/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 [2020-11-28 02:58:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-28 02:58:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-28 02:58:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:11,514 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:11,516 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 02:58:11,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:11 BoogieIcfgContainer [2020-11-28 02:58:11,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:11,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:11,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:11,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:11,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:10" (1/3) ... [2020-11-28 02:58:11,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104e4a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:11, skipping insertion in model container [2020-11-28 02:58:11,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:10" (2/3) ... [2020-11-28 02:58:11,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104e4a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:11, skipping insertion in model container [2020-11-28 02:58:11,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:11" (3/3) ... [2020-11-28 02:58:11,529 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2020-11-28 02:58:11,545 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:11,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-28 02:58:11,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 02:58:11,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:11,603 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:11,603 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:11,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:11,604 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:11,604 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:11,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:11,605 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-28 02:58:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:58:11,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:11,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:11,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash 617854126, now seen corresponding path program 1 times [2020-11-28 02:58:11,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:11,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436062716] [2020-11-28 02:58:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:11,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436062716] [2020-11-28 02:58:11,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:11,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906533877] [2020-11-28 02:58:11,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:11,921 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-11-28 02:58:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:12,112 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-11-28 02:58:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:12,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 02:58:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:12,123 INFO L225 Difference]: With dead ends: 82 [2020-11-28 02:58:12,124 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 02:58:12,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 02:58:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-11-28 02:58:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 02:58:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-11-28 02:58:12,175 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 8 [2020-11-28 02:58:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:12,176 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-11-28 02:58:12,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-11-28 02:58:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 02:58:12,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:12,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:12,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:58:12,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1973615774, now seen corresponding path program 1 times [2020-11-28 02:58:12,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321627245] [2020-11-28 02:58:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:12,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321627245] [2020-11-28 02:58:12,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:12,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:12,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417656151] [2020-11-28 02:58:12,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:12,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:12,269 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2020-11-28 02:58:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:12,453 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-11-28 02:58:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:12,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 02:58:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:12,455 INFO L225 Difference]: With dead ends: 59 [2020-11-28 02:58:12,455 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 02:58:12,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 02:58:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-11-28 02:58:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 02:58:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-11-28 02:58:12,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 9 [2020-11-28 02:58:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:12,473 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-11-28 02:58:12,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-11-28 02:58:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 02:58:12,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:12,476 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:12,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:58:12,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,478 INFO L82 PathProgramCache]: Analyzing trace with hash -716923045, now seen corresponding path program 1 times [2020-11-28 02:58:12,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587368247] [2020-11-28 02:58:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:12,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587368247] [2020-11-28 02:58:12,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:12,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:12,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371515985] [2020-11-28 02:58:12,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:12,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:12,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:12,585 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 5 states. [2020-11-28 02:58:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:12,761 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-11-28 02:58:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:12,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-28 02:58:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:12,766 INFO L225 Difference]: With dead ends: 77 [2020-11-28 02:58:12,766 INFO L226 Difference]: Without dead ends: 76 [2020-11-28 02:58:12,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-28 02:58:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-11-28 02:58:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-28 02:58:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-11-28 02:58:12,781 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 14 [2020-11-28 02:58:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:12,782 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-11-28 02:58:12,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-11-28 02:58:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:58:12,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:12,783 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:12,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:58:12,784 INFO L429 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1906450887, now seen corresponding path program 1 times [2020-11-28 02:58:12,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406404881] [2020-11-28 02:58:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:58:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:12,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406404881] [2020-11-28 02:58:12,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:12,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:58:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184661353] [2020-11-28 02:58:12,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:12,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:12,868 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 5 states. [2020-11-28 02:58:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:12,971 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2020-11-28 02:58:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:12,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 02:58:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:12,974 INFO L225 Difference]: With dead ends: 121 [2020-11-28 02:58:12,975 INFO L226 Difference]: Without dead ends: 85 [2020-11-28 02:58:12,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-28 02:58:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-11-28 02:58:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 02:58:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-11-28 02:58:12,991 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 15 [2020-11-28 02:58:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:12,992 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-11-28 02:58:12,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-11-28 02:58:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:58:12,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:12,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:12,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:58:12,994 INFO L429 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1029571699, now seen corresponding path program 1 times [2020-11-28 02:58:12,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:12,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281831403] [2020-11-28 02:58:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:58:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:13,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281831403] [2020-11-28 02:58:13,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:13,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:13,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921337445] [2020-11-28 02:58:13,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:13,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:13,070 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 5 states. [2020-11-28 02:58:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:13,204 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-11-28 02:58:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:13,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 02:58:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:13,207 INFO L225 Difference]: With dead ends: 102 [2020-11-28 02:58:13,207 INFO L226 Difference]: Without dead ends: 101 [2020-11-28 02:58:13,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:13,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-28 02:58:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-11-28 02:58:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-28 02:58:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-11-28 02:58:13,236 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 16 [2020-11-28 02:58:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:13,236 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-11-28 02:58:13,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-11-28 02:58:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 02:58:13,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:13,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:13,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:58:13,238 INFO L429 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:13,238 INFO L82 PathProgramCache]: Analyzing trace with hash -985645195, now seen corresponding path program 1 times [2020-11-28 02:58:13,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:13,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131548259] [2020-11-28 02:58:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:13,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131548259] [2020-11-28 02:58:13,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:13,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:58:13,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814513480] [2020-11-28 02:58:13,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:13,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:13,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:13,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:13,316 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 5 states. [2020-11-28 02:58:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:13,401 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2020-11-28 02:58:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:13,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-28 02:58:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:13,403 INFO L225 Difference]: With dead ends: 133 [2020-11-28 02:58:13,403 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 02:58:13,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 02:58:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-11-28 02:58:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 02:58:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-11-28 02:58:13,416 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 19 [2020-11-28 02:58:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:13,417 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-11-28 02:58:13,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-11-28 02:58:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:58:13,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:13,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:13,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:58:13,418 INFO L429 AbstractCegarLoop]: === Iteration 7 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:13,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1700557631, now seen corresponding path program 1 times [2020-11-28 02:58:13,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:13,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995933044] [2020-11-28 02:58:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:58:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995933044] [2020-11-28 02:58:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692461971] [2020-11-28 02:58:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/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 [2020-11-28 02:58:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:13,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:13,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-28 02:58:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470980685] [2020-11-28 02:58:13,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:58:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:58:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:13,880 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 9 states. [2020-11-28 02:58:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:14,024 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-11-28 02:58:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:14,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-28 02:58:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:14,027 INFO L225 Difference]: With dead ends: 67 [2020-11-28 02:58:14,027 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 02:58:14,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 02:58:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-11-28 02:58:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 02:58:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-11-28 02:58:14,054 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 18 [2020-11-28 02:58:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:14,054 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-11-28 02:58:14,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:58:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-11-28 02:58:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 02:58:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:14,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:14,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 02:58:14,257 INFO L429 AbstractCegarLoop]: === Iteration 8 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:14,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1177679063, now seen corresponding path program 1 times [2020-11-28 02:58:14,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:14,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217197338] [2020-11-28 02:58:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:58:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217197338] [2020-11-28 02:58:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061797093] [2020-11-28 02:58:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:14,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:14,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-28 02:58:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76638873] [2020-11-28 02:58:14,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:14,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:14,445 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 8 states. [2020-11-28 02:58:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:14,557 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-11-28 02:58:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:58:14,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-28 02:58:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:14,559 INFO L225 Difference]: With dead ends: 65 [2020-11-28 02:58:14,559 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 02:58:14,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 02:58:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-11-28 02:58:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 02:58:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-11-28 02:58:14,567 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 19 [2020-11-28 02:58:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:14,568 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-11-28 02:58:14,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-11-28 02:58:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 02:58:14,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:14,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:14,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:14,794 INFO L429 AbstractCegarLoop]: === Iteration 9 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:14,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1664379658, now seen corresponding path program 1 times [2020-11-28 02:58:14,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:14,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338497939] [2020-11-28 02:58:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:58:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-28 02:58:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338497939] [2020-11-28 02:58:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779203268] [2020-11-28 02:58:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:14,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:15,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:15,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-11-28 02:58:15,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603231961] [2020-11-28 02:58:15,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:58:15,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:58:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:58:15,043 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 11 states. [2020-11-28 02:58:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:15,318 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-11-28 02:58:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:58:15,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-11-28 02:58:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:15,320 INFO L225 Difference]: With dead ends: 94 [2020-11-28 02:58:15,321 INFO L226 Difference]: Without dead ends: 93 [2020-11-28 02:58:15,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-28 02:58:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-28 02:58:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-11-28 02:58:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 02:58:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-11-28 02:58:15,332 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2020-11-28 02:58:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:15,332 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-11-28 02:58:15,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:58:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-11-28 02:58:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 02:58:15,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:15,334 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:15,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:15,556 INFO L429 AbstractCegarLoop]: === Iteration 10 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 56161900, now seen corresponding path program 1 times [2020-11-28 02:58:15,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:15,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776877005] [2020-11-28 02:58:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:15,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:58:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:15,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-28 02:58:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 02:58:15,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776877005] [2020-11-28 02:58:15,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124418986] [2020-11-28 02:58:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:15,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:58:15,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:15,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-28 02:58:15,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54397352] [2020-11-28 02:58:15,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:15,771 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 8 states. [2020-11-28 02:58:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:15,922 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-11-28 02:58:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:58:15,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-28 02:58:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:15,924 INFO L225 Difference]: With dead ends: 97 [2020-11-28 02:58:15,924 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 02:58:15,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 02:58:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-11-28 02:58:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 02:58:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-11-28 02:58:15,932 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 26 [2020-11-28 02:58:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:15,937 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-11-28 02:58:15,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-11-28 02:58:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:58:15,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:15,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:16,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:16,156 INFO L429 AbstractCegarLoop]: === Iteration 11 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 02:58:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:16,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1710802957, now seen corresponding path program 1 times [2020-11-28 02:58:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:16,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307001566] [2020-11-28 02:58:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:16,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:16,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:16,240 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:16,240 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:16,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 02:58:16,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:16 BoogieIcfgContainer [2020-11-28 02:58:16,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:16,316 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:16,316 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:16,316 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:16,317 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:11" (3/4) ... [2020-11-28 02:58:16,318 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:58:16,398 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fae93769-5af2-474d-abe6-3b331d3f4b1d/bin/uautomizer/witness.graphml [2020-11-28 02:58:16,398 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:16,400 INFO L168 Benchmark]: Toolchain (without parser) took 5779.85 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 61.1 MB in the beginning and 89.6 MB in the end (delta: -28.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:16,402 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 90.2 MB. Free memory was 49.3 MB in the beginning and 49.3 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:16,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.04 ms. Allocated memory is still 90.2 MB. Free memory was 60.9 MB in the beginning and 68.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:16,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.15 ms. Allocated memory is still 90.2 MB. Free memory was 68.5 MB in the beginning and 67.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:16,405 INFO L168 Benchmark]: Boogie Preprocessor took 38.58 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 66.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:16,406 INFO L168 Benchmark]: RCFGBuilder took 537.77 ms. Allocated memory is still 90.2 MB. Free memory was 66.1 MB in the beginning and 52.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:16,406 INFO L168 Benchmark]: TraceAbstraction took 4793.88 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 51.8 MB in the beginning and 91.6 MB in the end (delta: -39.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:16,408 INFO L168 Benchmark]: Witness Printer took 82.75 ms. Allocated memory is still 134.2 MB. Free memory was 91.6 MB in the beginning and 89.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:16,410 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 90.2 MB. Free memory was 49.3 MB in the beginning and 49.3 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.04 ms. Allocated memory is still 90.2 MB. Free memory was 60.9 MB in the beginning and 68.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.15 ms. Allocated memory is still 90.2 MB. Free memory was 68.5 MB in the beginning and 67.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.58 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 66.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.77 ms. Allocated memory is still 90.2 MB. Free memory was 66.1 MB in the beginning and 52.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4793.88 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 51.8 MB in the beginning and 91.6 MB in the end (delta: -39.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Witness Printer took 82.75 ms. Allocated memory is still 134.2 MB. Free memory was 91.6 MB in the beginning and 89.6 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: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L28] int m = __VERIFIER_nondet_int(); [L29] COND FALSE !(m < 0) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0) [L36] CALL mult(m, n) VAL [\old(m)=2, \old(n)=1073741824] [L18] COND FALSE !(m < 0) VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L21] COND FALSE !(m == 0) VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L24] EXPR m - 1 VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L24] CALL, EXPR mult(n, m - 1) VAL [\old(m)=1, \old(n)=1073741824] [L18] COND FALSE !(m < 0) VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L21] COND FALSE !(m == 0) VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L24] EXPR m - 1 VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L24] CALL, EXPR mult(n, m - 1) VAL [\old(m)=0, \old(n)=1073741824] [L18] COND FALSE !(m < 0) VAL [\old(m)=0, \old(n)=1073741824, m=0, n=1073741824] [L21] COND TRUE m == 0 [L22] return 0; VAL [\old(m)=0, \old(n)=1073741824, \result=0, m=0, n=1073741824] [L24] RET, EXPR mult(n, m - 1) VAL [\old(m)=1, \old(n)=1073741824, m=1, mult(n, m - 1)=0, n=1073741824] [L24] EXPR n + mult(n, m - 1) [L24] return n + mult(n, m - 1); [L24] RET, EXPR mult(n, m - 1) VAL [\old(m)=2, \old(n)=1073741824, m=2, mult(n, m - 1)=1073741824, n=1073741824] [L24] n + mult(n, m - 1) VAL [\old(m)=2, \old(n)=1073741824, m=2, mult(n, m - 1)=1073741824, n=1073741824] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 35 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 308 SDslu, 622 SDs, 0 SdLazy, 540 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 84 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 286 NumberOfCodeBlocks, 286 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 243 ConstructedInterpolants, 0 QuantifiedInterpolants, 12545 SizeOfPredicates, 5 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 34/70 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! Received shutdown request...