./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_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/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 [2020-11-29 23:55:29,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:55:29,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:55:29,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:55:29,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:55:29,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:55:29,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:55:29,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:55:29,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:55:29,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:55:29,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:55:29,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:55:29,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:55:29,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:55:29,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:55:29,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:55:29,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:55:29,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:55:29,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:55:29,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:55:29,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:55:29,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:55:29,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:55:29,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:55:29,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:55:29,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:55:29,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:55:29,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:55:29,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:55:29,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:55:29,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:55:29,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:55:29,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:55:29,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:55:29,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:55:29,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:55:29,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:55:29,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:55:29,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:55:29,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:55:29,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:55:29,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-29 23:55:29,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:55:29,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:55:29,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:55:29,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:55:29,887 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:55:29,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:55:29,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:55:29,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:55:29,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:55:29,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:55:29,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:55:29,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:55:29,890 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 23:55:29,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:55:29,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:55:29,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:55:29,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:55:29,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:55:29,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:55:29,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:55:29,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:55:29,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:55:29,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:55:29,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:55:29,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:55:29,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:55:29,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:55:29,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:55:29,893 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_ddb90799-db30-4a18-a70c-f847eea4b4f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 [2020-11-29 23:55:30,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:55:30,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:55:30,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:55:30,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:55:30,255 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:55:30,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-11-29 23:55:30,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/data/6763ba6bd/e4c960a41ac74dc78efa403da888723e/FLAG21ff1b0d3 [2020-11-29 23:55:30,906 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:55:30,907 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-11-29 23:55:30,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/data/6763ba6bd/e4c960a41ac74dc78efa403da888723e/FLAG21ff1b0d3 [2020-11-29 23:55:31,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/data/6763ba6bd/e4c960a41ac74dc78efa403da888723e [2020-11-29 23:55:31,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:55:31,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:55:31,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:31,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:55:31,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:55:31,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4084df76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31, skipping insertion in model container [2020-11-29 23:55:31,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:55:31,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:55:31,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:31,515 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:55:31,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:31,544 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:55:31,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31 WrapperNode [2020-11-29 23:55:31,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:31,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:31,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:55:31,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:55:31,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:31,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:55:31,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:55:31,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:55:31,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... [2020-11-29 23:55:31,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:55:31,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:55:31,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:55:31,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:55:31,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/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 23:55:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-29 23:55:31,676 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-29 23:55:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:55:31,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:55:31,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:55:31,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:55:32,165 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:55:32,167 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 23:55:32,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:32 BoogieIcfgContainer [2020-11-29 23:55:32,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:55:32,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:55:32,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:55:32,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:55:32,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:55:31" (1/3) ... [2020-11-29 23:55:32,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22011688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:32, skipping insertion in model container [2020-11-29 23:55:32,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:31" (2/3) ... [2020-11-29 23:55:32,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22011688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:32, skipping insertion in model container [2020-11-29 23:55:32,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:32" (3/3) ... [2020-11-29 23:55:32,181 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2020-11-29 23:55:32,192 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:55:32,196 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 23:55:32,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 23:55:32,247 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:55:32,247 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:55:32,247 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:55:32,247 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:55:32,247 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:55:32,248 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:55:32,248 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:55:32,248 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:55:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-29 23:55:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 23:55:32,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:32,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:32,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 617854126, now seen corresponding path program 1 times [2020-11-29 23:55:32,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:32,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619731395] [2020-11-29 23:55:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:32,536 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 23:55:32,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619731395] [2020-11-29 23:55:32,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:32,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:32,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495177642] [2020-11-29 23:55:32,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:32,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:32,570 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-11-29 23:55:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:32,760 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-11-29 23:55:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:32,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 23:55:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:32,772 INFO L225 Difference]: With dead ends: 82 [2020-11-29 23:55:32,772 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 23:55:32,778 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 [2020-11-29 23:55:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 23:55:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-11-29 23:55:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 23:55:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-11-29 23:55:32,823 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 8 [2020-11-29 23:55:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:32,823 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-11-29 23:55:32,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-11-29 23:55:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:55:32,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:32,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:32,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:55:32,825 INFO L429 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1973615774, now seen corresponding path program 1 times [2020-11-29 23:55:32,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:32,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269490347] [2020-11-29 23:55:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:32,882 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 23:55:32,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269490347] [2020-11-29 23:55:32,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:32,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:32,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155371762] [2020-11-29 23:55:32,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:32,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:32,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:32,886 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2020-11-29 23:55:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:32,998 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-11-29 23:55:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:32,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-29 23:55:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,000 INFO L225 Difference]: With dead ends: 59 [2020-11-29 23:55:33,000 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 23:55:33,001 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 [2020-11-29 23:55:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 23:55:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-11-29 23:55:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 23:55:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-11-29 23:55:33,012 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 9 [2020-11-29 23:55:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,012 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-11-29 23:55:33,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-11-29 23:55:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:55:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,013 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:55:33,014 INFO L429 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:33,015 INFO L82 PathProgramCache]: Analyzing trace with hash -716923045, now seen corresponding path program 1 times [2020-11-29 23:55:33,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:33,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365929141] [2020-11-29 23:55:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:33,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365929141] [2020-11-29 23:55:33,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:33,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:33,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876144119] [2020-11-29 23:55:33,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:33,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:33,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:33,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:33,098 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 5 states. [2020-11-29 23:55:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:33,290 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-11-29 23:55:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:33,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-29 23:55:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,294 INFO L225 Difference]: With dead ends: 77 [2020-11-29 23:55:33,294 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 23:55:33,295 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 [2020-11-29 23:55:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 23:55:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-11-29 23:55:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 23:55:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-11-29 23:55:33,321 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 14 [2020-11-29 23:55:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,322 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-11-29 23:55:33,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-11-29 23:55:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 23:55:33,323 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,323 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:55:33,323 INFO L429 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1906450887, now seen corresponding path program 1 times [2020-11-29 23:55:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:33,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695159261] [2020-11-29 23:55:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 23:55:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:33,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695159261] [2020-11-29 23:55:33,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:33,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:55:33,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481282681] [2020-11-29 23:55:33,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:33,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:33,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:33,410 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 5 states. [2020-11-29 23:55:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:33,507 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2020-11-29 23:55:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:33,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 23:55:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,513 INFO L225 Difference]: With dead ends: 121 [2020-11-29 23:55:33,513 INFO L226 Difference]: Without dead ends: 85 [2020-11-29 23:55:33,514 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 [2020-11-29 23:55:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-29 23:55:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-11-29 23:55:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 23:55:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-11-29 23:55:33,540 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 15 [2020-11-29 23:55:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,540 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-11-29 23:55:33,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-11-29 23:55:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:55:33,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:55:33,542 INFO L429 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:33,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1029571699, now seen corresponding path program 1 times [2020-11-29 23:55:33,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:33,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887232515] [2020-11-29 23:55:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 23:55:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:33,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887232515] [2020-11-29 23:55:33,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:33,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583282982] [2020-11-29 23:55:33,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:33,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:33,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:33,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:33,615 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 5 states. [2020-11-29 23:55:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:33,704 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-11-29 23:55:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:33,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 23:55:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,706 INFO L225 Difference]: With dead ends: 102 [2020-11-29 23:55:33,706 INFO L226 Difference]: Without dead ends: 101 [2020-11-29 23:55:33,707 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 [2020-11-29 23:55:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-29 23:55:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-11-29 23:55:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 23:55:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-11-29 23:55:33,732 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 16 [2020-11-29 23:55:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,732 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-11-29 23:55:33,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-11-29 23:55:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:55:33,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,735 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:55:33,735 INFO L429 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:33,736 INFO L82 PathProgramCache]: Analyzing trace with hash -985645195, now seen corresponding path program 1 times [2020-11-29 23:55:33,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:33,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389467366] [2020-11-29 23:55:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:55:33,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389467366] [2020-11-29 23:55:33,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:33,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:55:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148262712] [2020-11-29 23:55:33,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:33,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:33,811 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 5 states. [2020-11-29 23:55:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:33,895 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2020-11-29 23:55:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:55:33,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-29 23:55:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,897 INFO L225 Difference]: With dead ends: 133 [2020-11-29 23:55:33,897 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 23:55:33,900 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 [2020-11-29 23:55:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 23:55:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-11-29 23:55:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 23:55:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-11-29 23:55:33,913 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 19 [2020-11-29 23:55:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,914 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-11-29 23:55:33,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-11-29 23:55:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:55:33,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 23:55:33,920 INFO L429 AbstractCegarLoop]: === Iteration 7 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1700557631, now seen corresponding path program 1 times [2020-11-29 23:55:33,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:33,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278083542] [2020-11-29 23:55:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 23:55:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:34,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278083542] [2020-11-29 23:55:34,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315419725] [2020-11-29 23:55:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/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 23:55:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:34,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:55:34,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-29 23:55:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844562347] [2020-11-29 23:55:34,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:34,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:34,211 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 9 states. [2020-11-29 23:55:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:34,356 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-11-29 23:55:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:55:34,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-29 23:55:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:34,358 INFO L225 Difference]: With dead ends: 67 [2020-11-29 23:55:34,358 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 23:55:34,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:55:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 23:55:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-11-29 23:55:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 23:55:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-11-29 23:55:34,369 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 18 [2020-11-29 23:55:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:34,370 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-11-29 23:55:34,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-11-29 23:55:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:55:34,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:34,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:34,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 23:55:34,574 INFO L429 AbstractCegarLoop]: === Iteration 8 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1177679063, now seen corresponding path program 1 times [2020-11-29 23:55:34,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:34,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351725466] [2020-11-29 23:55:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 23:55:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:34,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351725466] [2020-11-29 23:55:34,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534921631] [2020-11-29 23:55:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/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 [2020-11-29 23:55:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:55:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:34,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:55:34,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-29 23:55:34,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221085111] [2020-11-29 23:55:34,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:34,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:34,857 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 8 states. [2020-11-29 23:55:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:35,009 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-11-29 23:55:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:35,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 23:55:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:35,010 INFO L225 Difference]: With dead ends: 65 [2020-11-29 23:55:35,011 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 23:55:35,011 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 [2020-11-29 23:55:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 23:55:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-11-29 23:55:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 23:55:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-11-29 23:55:35,017 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 19 [2020-11-29 23:55:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:35,022 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-11-29 23:55:35,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-11-29 23:55:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 23:55:35,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:35,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:35,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:35,250 INFO L429 AbstractCegarLoop]: === Iteration 9 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1664379658, now seen corresponding path program 1 times [2020-11-29 23:55:35,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:35,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737621502] [2020-11-29 23:55:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:35,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 23:55:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:35,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-29 23:55:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:55:35,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737621502] [2020-11-29 23:55:35,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095674083] [2020-11-29 23:55:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/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 [2020-11-29 23:55:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:55:35,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:55:35,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-11-29 23:55:35,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854942134] [2020-11-29 23:55:35,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 23:55:35,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 23:55:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:55:35,492 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 11 states. [2020-11-29 23:55:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:35,750 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-11-29 23:55:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:55:35,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-11-29 23:55:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:35,752 INFO L225 Difference]: With dead ends: 94 [2020-11-29 23:55:35,752 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 23:55:35,753 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 [2020-11-29 23:55:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 23:55:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-11-29 23:55:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 23:55:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-11-29 23:55:35,763 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2020-11-29 23:55:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:35,763 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-11-29 23:55:35,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 23:55:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-11-29 23:55:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:55:35,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:35,765 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] [2020-11-29 23:55:35,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:35,982 INFO L429 AbstractCegarLoop]: === Iteration 10 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 56161900, now seen corresponding path program 1 times [2020-11-29 23:55:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535229776] [2020-11-29 23:55:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:36,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 23:55:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-29 23:55:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 23:55:36,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535229776] [2020-11-29 23:55:36,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987479529] [2020-11-29 23:55:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/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 [2020-11-29 23:55:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:55:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 23:55:36,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:55:36,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-29 23:55:36,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252993246] [2020-11-29 23:55:36,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:36,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:36,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:36,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:36,176 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 8 states. [2020-11-29 23:55:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:36,327 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-11-29 23:55:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:36,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-29 23:55:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:36,329 INFO L225 Difference]: With dead ends: 97 [2020-11-29 23:55:36,329 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 23:55:36,330 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 [2020-11-29 23:55:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 23:55:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-11-29 23:55:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 23:55:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-11-29 23:55:36,344 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 26 [2020-11-29 23:55:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:36,344 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-11-29 23:55:36,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-11-29 23:55:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 23:55:36,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:36,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:36,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:36,566 INFO L429 AbstractCegarLoop]: === Iteration 11 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:55:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1710802957, now seen corresponding path program 1 times [2020-11-29 23:55:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882562367] [2020-11-29 23:55:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:36,585 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:36,597 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:36,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:36,619 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:55:36,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 23:55:36,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:55:36 BoogieIcfgContainer [2020-11-29 23:55:36,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:55:36,669 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:55:36,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:55:36,673 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:55:36,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:32" (3/4) ... [2020-11-29 23:55:36,676 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:55:36,739 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ddb90799-db30-4a18-a70c-f847eea4b4f8/bin/uautomizer/witness.graphml [2020-11-29 23:55:36,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:55:36,741 INFO L168 Benchmark]: Toolchain (without parser) took 5454.86 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 75.8 MB in the beginning and 82.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:36,741 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 102.8 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:36,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.05 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 78.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:36,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.98 ms. Allocated memory is still 102.8 MB. Free memory was 78.1 MB in the beginning and 76.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:36,743 INFO L168 Benchmark]: Boogie Preprocessor took 18.12 ms. Allocated memory is still 102.8 MB. Free memory was 76.7 MB in the beginning and 75.7 MB in the end (delta: 963.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:36,744 INFO L168 Benchmark]: RCFGBuilder took 574.51 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 62.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:36,745 INFO L168 Benchmark]: TraceAbstraction took 4495.42 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 61.5 MB in the beginning and 84.8 MB in the end (delta: -23.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:36,746 INFO L168 Benchmark]: Witness Printer took 69.73 ms. Allocated memory is still 123.7 MB. Free memory was 84.8 MB in the beginning and 82.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:36,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 102.8 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.05 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 78.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.98 ms. Allocated memory is still 102.8 MB. Free memory was 78.1 MB in the beginning and 76.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.12 ms. Allocated memory is still 102.8 MB. Free memory was 76.7 MB in the beginning and 75.7 MB in the end (delta: 963.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 574.51 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 62.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4495.42 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 61.5 MB in the beginning and 84.8 MB in the end (delta: -23.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 69.73 ms. Allocated memory is still 123.7 MB. Free memory was 84.8 MB in the beginning and 82.8 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: 4.3s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.5s, 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, 0.8s 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, 1.0s 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...