./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 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/MultCommutative-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.2.1-dev-20ed64e [2021-08-27 11:01:37,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 11:01:37,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 11:01:37,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 11:01:37,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 11:01:37,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 11:01:37,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 11:01:37,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 11:01:37,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 11:01:37,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 11:01:37,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 11:01:37,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 11:01:37,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 11:01:37,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 11:01:37,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 11:01:37,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 11:01:37,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 11:01:37,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 11:01:37,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 11:01:37,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 11:01:37,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 11:01:37,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 11:01:37,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 11:01:37,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 11:01:37,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 11:01:37,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 11:01:37,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 11:01:37,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 11:01:37,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 11:01:37,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 11:01:37,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 11:01:37,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 11:01:37,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 11:01:37,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 11:01:37,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 11:01:37,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 11:01:37,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 11:01:37,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 11:01:37,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 11:01:37,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 11:01:37,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 11:01:37,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-08-27 11:01:37,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 11:01:37,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 11:01:37,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 11:01:37,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 11:01:37,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 11:01:37,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 11:01:37,238 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 11:01:37,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 11:01:37,239 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 11:01:37,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 11:01:37,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 11:01:37,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-27 11:01:37,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 11:01:37,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-27 11:01:37,241 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-27 11:01:37,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 11:01:37,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 11:01:37,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-27 11:01:37,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 11:01:37,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 11:01:37,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 11:01:37,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 11:01:37,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 11:01:37,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 11:01:37,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-27 11:01:37,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 11:01:37,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 11:01:37,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-27 11:01:37,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 11:01:37,244 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 [2021-08-27 11:01:37,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 11:01:37,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 11:01:37,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 11:01:37,581 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 11:01:37,582 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 11:01:37,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2021-08-27 11:01:37,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6585b14ea/1dab2c250f844610b8b745e8a01fb47f/FLAG58da852df [2021-08-27 11:01:38,111 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 11:01:38,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2021-08-27 11:01:38,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6585b14ea/1dab2c250f844610b8b745e8a01fb47f/FLAG58da852df [2021-08-27 11:01:38,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6585b14ea/1dab2c250f844610b8b745e8a01fb47f [2021-08-27 11:01:38,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 11:01:38,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 11:01:38,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 11:01:38,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 11:01:38,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 11:01:38,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35421221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38, skipping insertion in model container [2021-08-27 11:01:38,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 11:01:38,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 11:01:38,649 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/MultCommutative-1.c[1008,1021] [2021-08-27 11:01:38,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 11:01:38,661 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 11:01:38,672 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/MultCommutative-1.c[1008,1021] [2021-08-27 11:01:38,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 11:01:38,683 INFO L208 MainTranslator]: Completed translation [2021-08-27 11:01:38,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38 WrapperNode [2021-08-27 11:01:38,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 11:01:38,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 11:01:38,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 11:01:38,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 11:01:38,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 11:01:38,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 11:01:38,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 11:01:38,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 11:01:38,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 11:01:38,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 11:01:38,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 11:01:38,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 11:01:38,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (1/1) ... [2021-08-27 11:01:38,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 11:01:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:01:38,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 11:01:38,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 11:01:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-08-27 11:01:38,885 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-08-27 11:01:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 11:01:38,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 11:01:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 11:01:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 11:01:39,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 11:01:39,081 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 11:01:39,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:01:39 BoogieIcfgContainer [2021-08-27 11:01:39,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 11:01:39,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 11:01:39,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 11:01:39,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 11:01:39,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 11:01:38" (1/3) ... [2021-08-27 11:01:39,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6bc58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 11:01:39, skipping insertion in model container [2021-08-27 11:01:39,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:01:38" (2/3) ... [2021-08-27 11:01:39,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6bc58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 11:01:39, skipping insertion in model container [2021-08-27 11:01:39,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:01:39" (3/3) ... [2021-08-27 11:01:39,089 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2021-08-27 11:01:39,093 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 11:01:39,093 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-27 11:01:39,142 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 11:01:39,148 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 11:01:39,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-27 11:01:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 11:01:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 11:01:39,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:39,166 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:39,167 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 617794544, now seen corresponding path program 1 times [2021-08-27 11:01:39,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:39,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055804020] [2021-08-27 11:01:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:39,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:39,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:39,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055804020] [2021-08-27 11:01:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055804020] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:01:39,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:01:39,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 11:01:39,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141674911] [2021-08-27 11:01:39,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 11:01:39,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 11:01:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 11:01:39,435 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:39,569 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-08-27 11:01:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 11:01:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-27 11:01:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:39,578 INFO L225 Difference]: With dead ends: 81 [2021-08-27 11:01:39,578 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 11:01:39,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 11:01:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 11:01:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-27 11:01:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 31 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 11:01:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-08-27 11:01:39,623 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 8 [2021-08-27 11:01:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:39,624 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-08-27 11:01:39,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-08-27 11:01:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 11:01:39,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:39,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:39,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 11:01:39,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1971768732, now seen corresponding path program 1 times [2021-08-27 11:01:39,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:39,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610378118] [2021-08-27 11:01:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:39,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:39,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:39,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610378118] [2021-08-27 11:01:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610378118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:01:39,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:01:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 11:01:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997988594] [2021-08-27 11:01:39,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 11:01:39,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 11:01:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 11:01:39,720 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:39,810 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-08-27 11:01:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 11:01:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-27 11:01:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:39,814 INFO L225 Difference]: With dead ends: 59 [2021-08-27 11:01:39,815 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 11:01:39,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 11:01:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 11:01:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-08-27 11:01:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.368421052631579) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 11:01:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-08-27 11:01:39,830 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 9 [2021-08-27 11:01:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-08-27 11:01:39,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-08-27 11:01:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 11:01:39,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:39,832 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:39,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 11:01:39,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash -323955617, now seen corresponding path program 1 times [2021-08-27 11:01:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:39,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343141994] [2021-08-27 11:01:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:39,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:39,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:39,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343141994] [2021-08-27 11:01:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343141994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:01:39,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:01:39,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 11:01:39,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848267184] [2021-08-27 11:01:39,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 11:01:39,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 11:01:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 11:01:39,886 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:39,946 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2021-08-27 11:01:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 11:01:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-27 11:01:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:39,948 INFO L225 Difference]: With dead ends: 77 [2021-08-27 11:01:39,948 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 11:01:39,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 11:01:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 11:01:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-08-27 11:01:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.36) internal successors, (68), 54 states have internal predecessors, (68), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 11:01:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2021-08-27 11:01:39,959 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 14 [2021-08-27 11:01:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:39,959 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2021-08-27 11:01:39,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2021-08-27 11:01:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 11:01:39,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:39,961 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:39,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 11:01:39,961 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1630133947, now seen corresponding path program 1 times [2021-08-27 11:01:39,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:39,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906356219] [2021-08-27 11:01:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:39,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 11:01:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:40,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:40,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906356219] [2021-08-27 11:01:40,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906356219] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:01:40,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:01:40,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 11:01:40,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833401036] [2021-08-27 11:01:40,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 11:01:40,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 11:01:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 11:01:40,014 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 11:01:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:40,068 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-08-27 11:01:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 11:01:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 11:01:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:40,074 INFO L225 Difference]: With dead ends: 121 [2021-08-27 11:01:40,074 INFO L226 Difference]: Without dead ends: 85 [2021-08-27 11:01:40,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 11:01:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-27 11:01:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-08-27 11:01:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 61 states have internal predecessors, (78), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 11:01:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2021-08-27 11:01:40,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 15 [2021-08-27 11:01:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:40,102 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2021-08-27 11:01:40,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 11:01:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2021-08-27 11:01:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 11:01:40,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:40,103 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:40,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 11:01:40,103 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1005448143, now seen corresponding path program 1 times [2021-08-27 11:01:40,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:40,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16514540] [2021-08-27 11:01:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:40,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 11:01:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:40,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:40,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16514540] [2021-08-27 11:01:40,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16514540] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:01:40,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:01:40,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 11:01:40,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143523301] [2021-08-27 11:01:40,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 11:01:40,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 11:01:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 11:01:40,148 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 11:01:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:40,215 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2021-08-27 11:01:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 11:01:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 11:01:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:40,217 INFO L225 Difference]: With dead ends: 102 [2021-08-27 11:01:40,217 INFO L226 Difference]: Without dead ends: 101 [2021-08-27 11:01:40,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 11:01:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-27 11:01:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-08-27 11:01:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 73 states have internal predecessors, (93), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-27 11:01:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2021-08-27 11:01:40,243 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 16 [2021-08-27 11:01:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:40,243 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2021-08-27 11:01:40,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 11:01:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2021-08-27 11:01:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 11:01:40,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:40,244 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:40,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 11:01:40,244 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash -385899469, now seen corresponding path program 1 times [2021-08-27 11:01:40,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:40,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780387222] [2021-08-27 11:01:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:40,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 11:01:40,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:40,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780387222] [2021-08-27 11:01:40,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780387222] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:01:40,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:01:40,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 11:01:40,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196001733] [2021-08-27 11:01:40,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 11:01:40,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 11:01:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 11:01:40,320 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:40,366 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2021-08-27 11:01:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 11:01:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-27 11:01:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:40,367 INFO L225 Difference]: With dead ends: 133 [2021-08-27 11:01:40,367 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 11:01:40,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 11:01:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 11:01:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-08-27 11:01:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 11:01:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-08-27 11:01:40,373 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 19 [2021-08-27 11:01:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:40,373 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-08-27 11:01:40,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:01:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-08-27 11:01:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 11:01:40,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:40,374 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:40,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 11:01:40,374 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash -773947711, now seen corresponding path program 1 times [2021-08-27 11:01:40,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:40,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845564626] [2021-08-27 11:01:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:40,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-27 11:01:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:40,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:40,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845564626] [2021-08-27 11:01:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845564626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:40,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051810851] [2021-08-27 11:01:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:40,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:01:40,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:01:40,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 11:01:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 11:01:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:01:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051810851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:40,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:01:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-27 11:01:40,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418596411] [2021-08-27 11:01:40,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 11:01:40,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 11:01:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 11:01:40,669 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 11:01:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:40,760 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-08-27 11:01:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 11:01:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-08-27 11:01:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:40,763 INFO L225 Difference]: With dead ends: 67 [2021-08-27 11:01:40,763 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 11:01:40,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-27 11:01:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 11:01:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-27 11:01:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 11:01:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-08-27 11:01:40,772 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 18 [2021-08-27 11:01:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:40,773 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-08-27 11:01:40,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 11:01:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-08-27 11:01:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 11:01:40,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:40,774 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:40,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 11:01:40,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:40,996 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1777424789, now seen corresponding path program 1 times [2021-08-27 11:01:40,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:40,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501998661] [2021-08-27 11:01:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:40,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-27 11:01:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:41,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:41,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501998661] [2021-08-27 11:01:41,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501998661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:41,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036329565] [2021-08-27 11:01:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:41,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:41,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:01:41,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:01:41,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 11:01:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 11:01:41,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:01:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:01:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036329565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:41,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:01:41,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 11:01:41,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995122829] [2021-08-27 11:01:41,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 11:01:41,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 11:01:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 11:01:41,339 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 11:01:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:41,449 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-08-27 11:01:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 11:01:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-08-27 11:01:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:41,451 INFO L225 Difference]: With dead ends: 65 [2021-08-27 11:01:41,451 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 11:01:41,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-27 11:01:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 11:01:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-08-27 11:01:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 11:01:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-08-27 11:01:41,460 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 19 [2021-08-27 11:01:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:41,461 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-08-27 11:01:41,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 11:01:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-08-27 11:01:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 11:01:41,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:41,462 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:41,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 11:01:41,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-27 11:01:41,681 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash -211759156, now seen corresponding path program 1 times [2021-08-27 11:01:41,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:41,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438474150] [2021-08-27 11:01:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:41,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 11:01:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 11:01:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 11:01:41,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:41,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438474150] [2021-08-27 11:01:41,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438474150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:41,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374272271] [2021-08-27 11:01:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:41,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:41,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:01:41,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:01:41,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 11:01:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:41,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 11:01:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:01:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 11:01:41,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374272271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:41,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:01:41,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-27 11:01:41,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129979607] [2021-08-27 11:01:42,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 11:01:42,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 11:01:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 11:01:42,006 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 11:01:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:42,159 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-08-27 11:01:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 11:01:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-08-27 11:01:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:42,161 INFO L225 Difference]: With dead ends: 94 [2021-08-27 11:01:42,162 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 11:01:42,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-27 11:01:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 11:01:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-08-27 11:01:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 11:01:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-08-27 11:01:42,173 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2021-08-27 11:01:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-08-27 11:01:42,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 11:01:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-08-27 11:01:42,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 11:01:42,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:42,178 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:42,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 11:01:42,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:42,385 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2025400810, now seen corresponding path program 1 times [2021-08-27 11:01:42,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:42,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357545049] [2021-08-27 11:01:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:42,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:42,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 11:01:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 11:01:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 11:01:42,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:01:42,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357545049] [2021-08-27 11:01:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357545049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:42,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951712905] [2021-08-27 11:01:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:42,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:01:42,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:01:42,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 11:01:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:01:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 11:01:42,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:01:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 11:01:42,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951712905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:01:42,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:01:42,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 11:01:42,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590936702] [2021-08-27 11:01:42,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 11:01:42,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:01:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 11:01:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 11:01:42,749 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 11:01:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:01:42,826 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2021-08-27 11:01:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 11:01:42,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-08-27 11:01:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:01:42,827 INFO L225 Difference]: With dead ends: 97 [2021-08-27 11:01:42,827 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 11:01:42,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-27 11:01:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 11:01:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-08-27 11:01:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 11:01:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-27 11:01:42,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 26 [2021-08-27 11:01:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:01:42,831 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-27 11:01:42,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 11:01:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-27 11:01:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 11:01:42,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:01:42,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 11:01:42,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 11:01:43,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:01:43,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-08-27 11:01:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:01:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash 360381511, now seen corresponding path program 1 times [2021-08-27 11:01:43,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:01:43,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408620088] [2021-08-27 11:01:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:01:43,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:01:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 11:01:43,073 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 11:01:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 11:01:43,108 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 11:01:43,108 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 11:01:43,109 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:01:43,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:01:43,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:01:43,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:01:43,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:01:43,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:01:43,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 11:01:43,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 11:01:43,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 11:01:43 BoogieIcfgContainer [2021-08-27 11:01:43,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 11:01:43,166 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 11:01:43,166 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 11:01:43,167 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 11:01:43,167 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:01:39" (3/4) ... [2021-08-27 11:01:43,168 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 11:01:43,219 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 11:01:43,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 11:01:43,222 INFO L168 Benchmark]: Toolchain (without parser) took 4698.66 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 39.6 MB in the beginning and 42.6 MB in the end (delta: -3.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-08-27 11:01:43,223 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 60.8 MB. Free memory was 42.8 MB in the beginning and 42.8 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 11:01:43,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.28 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 30.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 11:01:43,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.60 ms. Allocated memory is still 60.8 MB. Free memory was 30.1 MB in the beginning and 44.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 11:01:43,224 INFO L168 Benchmark]: Boogie Preprocessor took 35.47 ms. Allocated memory is still 60.8 MB. Free memory was 44.6 MB in the beginning and 43.7 MB in the end (delta: 938.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 11:01:43,224 INFO L168 Benchmark]: RCFGBuilder took 272.78 ms. Allocated memory is still 60.8 MB. Free memory was 43.5 MB in the beginning and 29.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 11:01:43,225 INFO L168 Benchmark]: TraceAbstraction took 4082.01 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 28.8 MB in the beginning and 45.2 MB in the end (delta: -16.4 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-08-27 11:01:43,225 INFO L168 Benchmark]: Witness Printer took 54.88 ms. Allocated memory is still 88.1 MB. Free memory was 45.2 MB in the beginning and 42.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 11:01:43,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 60.8 MB. Free memory was 42.8 MB in the beginning and 42.8 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 160.28 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 30.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.60 ms. Allocated memory is still 60.8 MB. Free memory was 30.1 MB in the beginning and 44.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.47 ms. Allocated memory is still 60.8 MB. Free memory was 44.6 MB in the beginning and 43.7 MB in the end (delta: 938.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 272.78 ms. Allocated memory is still 60.8 MB. Free memory was 43.5 MB in the beginning and 29.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4082.01 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 28.8 MB in the beginning and 45.2 MB in the end (delta: -16.4 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Witness Printer took 54.88 ms. Allocated memory is still 88.1 MB. Free memory was 45.2 MB in the beginning and 42.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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] - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 34 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 3973.4ms, OverallIterations: 11, TraceHistogramMax: 3, EmptinessCheckTime: 14.8ms, AutomataDifference: 967.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 252 SDtfs, 324 SDslu, 644 SDs, 0 SdLazy, 537 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 410.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 496.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=5, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 138.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 84 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 46.2ms SsaConstructionTime, 224.6ms SatisfiabilityAnalysisTime, 1269.6ms InterpolantComputationTime, 286 NumberOfCodeBlocks, 286 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 243 ConstructedInterpolants, 0 QuantifiedInterpolants, 651 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! [2021-08-27 11:01:43,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...