./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 f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 a7af5709195f6c1eec73f2559f8e654af4840835 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-11-28 20:25:05,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:25:05,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:25:05,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:25:05,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:25:05,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:25:05,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:25:05,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:25:05,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:25:05,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:25:05,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:25:05,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:25:05,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:25:05,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:25:05,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:25:05,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:25:05,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:25:05,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:25:05,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:25:05,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:25:05,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:25:05,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:25:05,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:25:05,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:25:05,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:25:05,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:25:05,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:25:05,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:25:05,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:25:05,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:25:05,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:25:05,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:25:05,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:25:05,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:25:05,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:25:05,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:25:05,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:25:05,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:25:05,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:25:05,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:25:05,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:25:05,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-28 20:25:05,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:25:05,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:25:05,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:25:05,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:25:05,728 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:25:05,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:25:05,729 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:25:05,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:25:05,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:25:05,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 20:25:05,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:25:05,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 20:25:05,732 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-28 20:25:05,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:25:05,733 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:25:05,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 20:25:05,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:25:05,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:25:05,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:25:05,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:25:05,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:25:05,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:25:05,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:25:05,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 20:25:05,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:25:05,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:25:05,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 20:25:05,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:25:05,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> a7af5709195f6c1eec73f2559f8e654af4840835 [2019-11-28 20:25:06,023 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:25:06,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:25:06,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:25:06,055 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:25:06,055 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:25:06,056 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2019-11-28 20:25:06,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273c14303/447151f6a1144064a814bb3270e83424/FLAG1cd306591 [2019-11-28 20:25:06,559 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:25:06,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2019-11-28 20:25:06,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273c14303/447151f6a1144064a814bb3270e83424/FLAG1cd306591 [2019-11-28 20:25:06,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273c14303/447151f6a1144064a814bb3270e83424 [2019-11-28 20:25:06,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:25:06,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:25:06,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:25:06,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:25:06,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:25:06,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:25:06" (1/1) ... [2019-11-28 20:25:06,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff68dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:06, skipping insertion in model container [2019-11-28 20:25:06,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:25:06" (1/1) ... [2019-11-28 20:25:06,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:25:06,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:25:07,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:25:07,159 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:25:07,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:25:07,188 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:25:07,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07 WrapperNode [2019-11-28 20:25:07,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:25:07,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:25:07,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:25:07,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:25:07,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:25:07,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:25:07,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:25:07,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:25:07,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... [2019-11-28 20:25:07,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:25:07,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:25:07,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:25:07,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:25:07,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:25:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2019-11-28 20:25:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2019-11-28 20:25:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:25:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:25:07,602 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:25:07,602 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 20:25:07,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:25:07 BoogieIcfgContainer [2019-11-28 20:25:07,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:25:07,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:25:07,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:25:07,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:25:07,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:25:06" (1/3) ... [2019-11-28 20:25:07,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756dc8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:25:07, skipping insertion in model container [2019-11-28 20:25:07,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:25:07" (2/3) ... [2019-11-28 20:25:07,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756dc8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:25:07, skipping insertion in model container [2019-11-28 20:25:07,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:25:07" (3/3) ... [2019-11-28 20:25:07,611 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2019-11-28 20:25:07,622 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:25:07,651 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-28 20:25:07,666 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-28 20:25:07,690 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:25:07,690 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 20:25:07,690 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:25:07,690 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:25:07,690 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:25:07,691 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:25:07,691 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:25:07,691 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:25:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-28 20:25:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 20:25:07,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:07,713 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:07,713 INFO L410 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash 887577448, now seen corresponding path program 1 times [2019-11-28 20:25:07,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:07,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857225268] [2019-11-28 20:25:07,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:07,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857225268] [2019-11-28 20:25:07,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:25:07,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:25:07,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150124084] [2019-11-28 20:25:07,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:25:07,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:07,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:25:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:25:07,993 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-11-28 20:25:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:08,187 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-11-28 20:25:08,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:25:08,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-28 20:25:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:08,199 INFO L225 Difference]: With dead ends: 80 [2019-11-28 20:25:08,200 INFO L226 Difference]: Without dead ends: 42 [2019-11-28 20:25:08,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:25:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-28 20:25:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-11-28 20:25:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-28 20:25:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-28 20:25:08,248 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2019-11-28 20:25:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:08,248 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-28 20:25:08,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:25:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-28 20:25:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 20:25:08,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:08,251 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:08,252 INFO L410 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1745104164, now seen corresponding path program 1 times [2019-11-28 20:25:08,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:08,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362955065] [2019-11-28 20:25:08,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:08,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362955065] [2019-11-28 20:25:08,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:25:08,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:25:08,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337373560] [2019-11-28 20:25:08,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:25:08,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:25:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:25:08,349 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2019-11-28 20:25:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:08,458 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-11-28 20:25:08,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:25:08,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-28 20:25:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:08,460 INFO L225 Difference]: With dead ends: 58 [2019-11-28 20:25:08,460 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 20:25:08,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:25:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 20:25:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2019-11-28 20:25:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-28 20:25:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-11-28 20:25:08,477 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 8 [2019-11-28 20:25:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:08,478 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-11-28 20:25:08,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:25:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-11-28 20:25:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 20:25:08,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:08,480 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:08,481 INFO L410 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:08,482 INFO L82 PathProgramCache]: Analyzing trace with hash 80311672, now seen corresponding path program 1 times [2019-11-28 20:25:08,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:08,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769471798] [2019-11-28 20:25:08,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:08,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769471798] [2019-11-28 20:25:08,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:25:08,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:25:08,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931761808] [2019-11-28 20:25:08,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:25:08,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:08,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:25:08,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:25:08,568 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 5 states. [2019-11-28 20:25:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:08,673 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2019-11-28 20:25:08,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 20:25:08,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-28 20:25:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:08,675 INFO L225 Difference]: With dead ends: 106 [2019-11-28 20:25:08,676 INFO L226 Difference]: Without dead ends: 64 [2019-11-28 20:25:08,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:25:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-28 20:25:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2019-11-28 20:25:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-28 20:25:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2019-11-28 20:25:08,704 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 13 [2019-11-28 20:25:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:08,705 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2019-11-28 20:25:08,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:25:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2019-11-28 20:25:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 20:25:08,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:08,708 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:08,708 INFO L410 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1248859076, now seen corresponding path program 1 times [2019-11-28 20:25:08,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:08,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287276020] [2019-11-28 20:25:08,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:08,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287276020] [2019-11-28 20:25:08,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:25:08,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:25:08,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875010180] [2019-11-28 20:25:08,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:25:08,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:25:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:25:08,798 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 5 states. [2019-11-28 20:25:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:08,867 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2019-11-28 20:25:08,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:25:08,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-28 20:25:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:08,869 INFO L225 Difference]: With dead ends: 81 [2019-11-28 20:25:08,870 INFO L226 Difference]: Without dead ends: 54 [2019-11-28 20:25:08,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:25:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-28 20:25:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-28 20:25:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-28 20:25:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-28 20:25:08,884 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-11-28 20:25:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:08,885 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-28 20:25:08,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:25:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-28 20:25:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 20:25:08,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:08,886 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:08,887 INFO L410 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 59932744, now seen corresponding path program 1 times [2019-11-28 20:25:08,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:08,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598176786] [2019-11-28 20:25:08,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:08,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598176786] [2019-11-28 20:25:08,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:25:08,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:25:08,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385624472] [2019-11-28 20:25:08,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:25:08,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:25:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:25:08,955 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 5 states. [2019-11-28 20:25:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:09,010 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2019-11-28 20:25:09,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:25:09,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-28 20:25:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:09,012 INFO L225 Difference]: With dead ends: 57 [2019-11-28 20:25:09,012 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 20:25:09,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:25:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 20:25:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2019-11-28 20:25:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 20:25:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-28 20:25:09,023 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2019-11-28 20:25:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:09,024 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-28 20:25:09,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:25:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-28 20:25:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 20:25:09,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:09,025 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:09,026 INFO L410 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash -65083495, now seen corresponding path program 1 times [2019-11-28 20:25:09,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:09,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657247576] [2019-11-28 20:25:09,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:09,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657247576] [2019-11-28 20:25:09,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416705168] [2019-11-28 20:25:09,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:09,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 20:25:09,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:25:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:09,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:25:09,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 20:25:09,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052714493] [2019-11-28 20:25:09,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 20:25:09,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 20:25:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:25:09,197 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 8 states. [2019-11-28 20:25:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:09,345 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-11-28 20:25:09,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 20:25:09,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-28 20:25:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:09,347 INFO L225 Difference]: With dead ends: 66 [2019-11-28 20:25:09,347 INFO L226 Difference]: Without dead ends: 65 [2019-11-28 20:25:09,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-28 20:25:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-28 20:25:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-11-28 20:25:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 20:25:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2019-11-28 20:25:09,359 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 17 [2019-11-28 20:25:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:09,361 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2019-11-28 20:25:09,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 20:25:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2019-11-28 20:25:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 20:25:09,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:09,364 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:09,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:09,570 INFO L410 AbstractCegarLoop]: === Iteration 7 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2017588291, now seen corresponding path program 1 times [2019-11-28 20:25:09,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:09,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247437629] [2019-11-28 20:25:09,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:09,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247437629] [2019-11-28 20:25:09,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379166559] [2019-11-28 20:25:09,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:09,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:25:09,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:25:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:25:09,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:25:09,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-28 20:25:09,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472420882] [2019-11-28 20:25:09,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 20:25:09,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:09,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 20:25:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:25:09,718 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 8 states. [2019-11-28 20:25:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:09,811 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2019-11-28 20:25:09,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:25:09,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-28 20:25:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:09,813 INFO L225 Difference]: With dead ends: 60 [2019-11-28 20:25:09,813 INFO L226 Difference]: Without dead ends: 59 [2019-11-28 20:25:09,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:25:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-28 20:25:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-11-28 20:25:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 20:25:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-11-28 20:25:09,823 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 18 [2019-11-28 20:25:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:09,823 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-11-28 20:25:09,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 20:25:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-11-28 20:25:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-28 20:25:09,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:09,825 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:10,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:10,029 INFO L410 AbstractCegarLoop]: === Iteration 8 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1437475595, now seen corresponding path program 1 times [2019-11-28 20:25:10,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:10,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478203428] [2019-11-28 20:25:10,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:25:10,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478203428] [2019-11-28 20:25:10,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45860950] [2019-11-28 20:25:10,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 20:25:10,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:25:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:25:10,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:25:10,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-28 20:25:10,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431275733] [2019-11-28 20:25:10,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 20:25:10,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 20:25:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:25:10,254 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 11 states. [2019-11-28 20:25:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:10,469 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-11-28 20:25:10,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 20:25:10,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-28 20:25:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:10,472 INFO L225 Difference]: With dead ends: 86 [2019-11-28 20:25:10,472 INFO L226 Difference]: Without dead ends: 85 [2019-11-28 20:25:10,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-11-28 20:25:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-28 20:25:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2019-11-28 20:25:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-28 20:25:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2019-11-28 20:25:10,486 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 24 [2019-11-28 20:25:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:10,486 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2019-11-28 20:25:10,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 20:25:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2019-11-28 20:25:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 20:25:10,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:10,489 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:10,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:10,693 INFO L410 AbstractCegarLoop]: === Iteration 9 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1612070431, now seen corresponding path program 1 times [2019-11-28 20:25:10,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:10,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581700519] [2019-11-28 20:25:10,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:25:10,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581700519] [2019-11-28 20:25:10,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628315853] [2019-11-28 20:25:10,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:25:10,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:25:10,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:25:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 20:25:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:25:10,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-28 20:25:10,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409965682] [2019-11-28 20:25:10,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 20:25:10,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:25:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 20:25:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:25:10,840 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 8 states. [2019-11-28 20:25:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:25:10,928 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-11-28 20:25:10,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:25:10,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-28 20:25:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:25:10,929 INFO L225 Difference]: With dead ends: 80 [2019-11-28 20:25:10,929 INFO L226 Difference]: Without dead ends: 55 [2019-11-28 20:25:10,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:25:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-28 20:25:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-28 20:25:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-28 20:25:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-28 20:25:10,940 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 25 [2019-11-28 20:25:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:25:10,940 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-28 20:25:10,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 20:25:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-28 20:25:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-28 20:25:10,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:25:10,942 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:25:11,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:25:11,143 INFO L410 AbstractCegarLoop]: === Iteration 10 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:25:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:25:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash 935767789, now seen corresponding path program 1 times [2019-11-28 20:25:11,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:25:11,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530989778] [2019-11-28 20:25:11,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:25:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:25:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:25:11,184 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:25:11,184 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 20:25:11,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:25:11 BoogieIcfgContainer [2019-11-28 20:25:11,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:25:11,227 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:25:11,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:25:11,227 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:25:11,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:25:07" (3/4) ... [2019-11-28 20:25:11,232 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 20:25:11,314 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:25:11,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:25:11,322 INFO L168 Benchmark]: Toolchain (without parser) took 4362.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 956.3 MB in the beginning and 863.5 MB in the end (delta: 92.8 MB). Peak memory consumption was 236.4 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,322 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:25:11,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.85 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,329 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,330 INFO L168 Benchmark]: Boogie Preprocessor took 15.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,331 INFO L168 Benchmark]: RCFGBuilder took 306.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,331 INFO L168 Benchmark]: TraceAbstraction took 3621.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 870.1 MB in the end (delta: 244.2 MB). Peak memory consumption was 244.2 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,332 INFO L168 Benchmark]: Witness Printer took 87.53 ms. Allocated memory is still 1.2 GB. Free memory was 870.1 MB in the beginning and 863.5 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:25:11,337 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 234.85 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 91.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 306.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3621.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 870.1 MB in the end (delta: 244.2 MB). Peak memory consumption was 244.2 MB. Max. memory is 11.5 GB. * Witness Printer took 87.53 ms. Allocated memory is still 1.2 GB. Free memory was 870.1 MB in the beginning and 863.5 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: integer overflow possible integer overflow possible We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0) [L30] int n = __VERIFIER_nondet_int(); [L31] COND FALSE !(n < 0) [L34] CALL mult(m, n) VAL [\old(m)=2, \old(n)=1073741824] [L16] COND FALSE !(m < 0) VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L19] COND FALSE !(m == 0) VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L22] EXPR m - 1 VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L22] CALL, EXPR mult(n, m - 1) VAL [\old(m)=1, \old(n)=1073741824] [L16] COND FALSE !(m < 0) VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L19] COND FALSE !(m == 0) VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L22] EXPR m - 1 VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L22] CALL, EXPR mult(n, m - 1) VAL [\old(m)=0, \old(n)=1073741824] [L16] COND FALSE !(m < 0) VAL [\old(m)=0, \old(n)=1073741824, m=0, n=1073741824] [L19] COND TRUE m == 0 [L20] return 0; VAL [\old(m)=0, \old(n)=1073741824, \result=0, m=0, n=1073741824] [L22] RET, EXPR mult(n, m - 1) VAL [\old(m)=1, \old(n)=1073741824, m=1, mult(n, m - 1)=0, n=1073741824] [L22] EXPR n + mult(n, m - 1) [L22] return n + mult(n, m - 1); [L22] RET, EXPR mult(n, m - 1) VAL [\old(m)=2, \old(n)=1073741824, m=2, mult(n, m - 1)=1073741824, n=1073741824] [L22] n + mult(n, m - 1) VAL [\old(m)=2, \old(n)=1073741824, m=2, mult(n, m - 1)=1073741824, n=1073741824] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 6 error locations. Result: UNSAFE, OverallTime: 3.4s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 240 SDslu, 558 SDs, 0 SdLazy, 487 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 47 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 253 NumberOfCodeBlocks, 253 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 10090 SizeOfPredicates, 5 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 27/63 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...