./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b 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/recursive/MultCommutative-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-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 32bit --witnessprinter.graph.data.programhash ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:41:55,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:41:55,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:41:55,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:41:55,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:41:55,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:41:55,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:41:55,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:41:55,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:41:55,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:41:55,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:41:55,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:41:55,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:41:55,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:41:55,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:41:55,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:41:55,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:41:55,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:41:55,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:41:55,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:41:55,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:41:55,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:41:55,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:41:55,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:41:55,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:41:55,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:41:55,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:41:55,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:41:55,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:41:55,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:41:55,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:41:55,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:41:55,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:41:55,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:41:55,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:41:55,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:41:55,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:41:55,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:41:55,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:41:55,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:41:55,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:41:55,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-14 22:41:55,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:41:55,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:41:55,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:41:55,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:41:55,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 22:41:55,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 22:41:55,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:41:55,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:41:55,631 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:41:55,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:41:55,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 22:41:55,632 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:41:55,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:41:55,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 22:41:55,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:41:55,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 22:41:55,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 22:41:55,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 22:41:55,633 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-14 22:41:55,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 22:41:55,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 22:41:55,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:41:55,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 22:41:55,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:41:55,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:41:55,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 22:41:55,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:41:55,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:41:55,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 22:41:55,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 22:41:55,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:41:55,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 22:41:55,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 22:41:55,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:41:55,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2021-12-14 22:41:55,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:41:55,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:41:55,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:41:55,846 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:41:55,846 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:41:55,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2021-12-14 22:41:55,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0628ef1cf/8afbd9dd2aef416eb43eb64409ab8439/FLAG32c851e57 [2021-12-14 22:41:56,228 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:41:56,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2021-12-14 22:41:56,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0628ef1cf/8afbd9dd2aef416eb43eb64409ab8439/FLAG32c851e57 [2021-12-14 22:41:56,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0628ef1cf/8afbd9dd2aef416eb43eb64409ab8439 [2021-12-14 22:41:56,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:41:56,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:41:56,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:41:56,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:41:56,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:41:56,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77adbbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56, skipping insertion in model container [2021-12-14 22:41:56,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:41:56,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:41:56,415 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-12-14 22:41:56,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:41:56,422 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:41:56,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-12-14 22:41:56,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:41:56,440 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:41:56,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56 WrapperNode [2021-12-14 22:41:56,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:41:56,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:41:56,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:41:56,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:41:56,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,465 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-12-14 22:41:56,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:41:56,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:41:56,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:41:56,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:41:56,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:41:56,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:41:56,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:41:56,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:41:56,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (1/1) ... [2021-12-14 22:41:56,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:41:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:56,545 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) [2021-12-14 22:41:56,563 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 [2021-12-14 22:41:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 22:41:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-12-14 22:41:56,578 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-12-14 22:41:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:41:56,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:41:56,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 22:41:56,622 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:41:56,623 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:41:56,756 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:41:56,761 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:41:56,761 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 22:41:56,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:56 BoogieIcfgContainer [2021-12-14 22:41:56,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:41:56,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 22:41:56,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 22:41:56,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 22:41:56,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:41:56" (1/3) ... [2021-12-14 22:41:56,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a2918a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:56, skipping insertion in model container [2021-12-14 22:41:56,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:56" (2/3) ... [2021-12-14 22:41:56,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a2918a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:56, skipping insertion in model container [2021-12-14 22:41:56,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:56" (3/3) ... [2021-12-14 22:41:56,813 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2021-12-14 22:41:56,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 22:41:56,816 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-12-14 22:41:56,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 22:41:56,855 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, mAutomataTypeConcurrency=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 [2021-12-14 22:41:56,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-14 22:41:56,872 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) [2021-12-14 22:41:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 22:41:56,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:56,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:56,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 617794544, now seen corresponding path program 1 times [2021-12-14 22:41:56,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:56,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268450846] [2021-12-14 22:41:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:56,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:57,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268450846] [2021-12-14 22:41:57,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268450846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:41:57,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:41:57,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:41:57,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319381347] [2021-12-14 22:41:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:41:57,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:41:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:41:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:41:57,068 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) [2021-12-14 22:41:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:57,167 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-12-14 22:41:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:41:57,170 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 [2021-12-14 22:41:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:57,176 INFO L225 Difference]: With dead ends: 81 [2021-12-14 22:41:57,176 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 22:41:57,179 INFO L932 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 [2021-12-14 22:41:57,182 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:57,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 101 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 22:41:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-12-14 22:41:57,211 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) [2021-12-14 22:41:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-12-14 22:41:57,216 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 8 [2021-12-14 22:41:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:57,216 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-12-14 22:41:57,216 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) [2021-12-14 22:41:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-12-14 22:41:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 22:41:57,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:57,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:57,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 22:41:57,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1971768732, now seen corresponding path program 1 times [2021-12-14 22:41:57,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:57,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423446431] [2021-12-14 22:41:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:57,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423446431] [2021-12-14 22:41:57,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423446431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:41:57,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:41:57,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:41:57,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302524848] [2021-12-14 22:41:57,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:41:57,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:41:57,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:57,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:41:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:41:57,270 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) 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) [2021-12-14 22:41:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:57,344 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-12-14 22:41:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:41:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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 [2021-12-14 22:41:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:57,347 INFO L225 Difference]: With dead ends: 59 [2021-12-14 22:41:57,347 INFO L226 Difference]: Without dead ends: 57 [2021-12-14 22:41:57,350 INFO L932 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 [2021-12-14 22:41:57,351 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:57,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-14 22:41:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-12-14 22:41:57,369 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) [2021-12-14 22:41:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-12-14 22:41:57,371 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 9 [2021-12-14 22:41:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:57,372 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-12-14 22:41:57,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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) [2021-12-14 22:41:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-12-14 22:41:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 22:41:57,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:57,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:57,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 22:41:57,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -323955617, now seen corresponding path program 1 times [2021-12-14 22:41:57,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581459891] [2021-12-14 22:41:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:57,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581459891] [2021-12-14 22:41:57,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581459891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:41:57,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:41:57,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:41:57,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341921142] [2021-12-14 22:41:57,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:41:57,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:41:57,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:57,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:41:57,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:41:57,417 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) [2021-12-14 22:41:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:57,480 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2021-12-14 22:41:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:41:57,481 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 [2021-12-14 22:41:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:57,482 INFO L225 Difference]: With dead ends: 77 [2021-12-14 22:41:57,483 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 22:41:57,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 22:41:57,484 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:57,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 22:41:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-12-14 22:41:57,490 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) [2021-12-14 22:41:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2021-12-14 22:41:57,501 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 14 [2021-12-14 22:41:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:57,502 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2021-12-14 22:41:57,502 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) [2021-12-14 22:41:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2021-12-14 22:41:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 22:41:57,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:57,503 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:57,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 22:41:57,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1630133947, now seen corresponding path program 1 times [2021-12-14 22:41:57,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:57,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558668813] [2021-12-14 22:41:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:57,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558668813] [2021-12-14 22:41:57,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558668813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:41:57,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:41:57,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:41:57,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89921745] [2021-12-14 22:41:57,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:41:57,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:41:57,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:41:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:41:57,580 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) [2021-12-14 22:41:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:57,624 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-12-14 22:41:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:41:57,624 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 [2021-12-14 22:41:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:57,626 INFO L225 Difference]: With dead ends: 121 [2021-12-14 22:41:57,626 INFO L226 Difference]: Without dead ends: 85 [2021-12-14 22:41:57,627 INFO L932 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 [2021-12-14 22:41:57,627 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:57,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 93 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-14 22:41:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-12-14 22:41:57,650 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) [2021-12-14 22:41:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2021-12-14 22:41:57,651 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 15 [2021-12-14 22:41:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:57,651 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2021-12-14 22:41:57,652 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) [2021-12-14 22:41:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2021-12-14 22:41:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 22:41:57,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:57,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:57,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 22:41:57,653 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1005448143, now seen corresponding path program 1 times [2021-12-14 22:41:57,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:57,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411549653] [2021-12-14 22:41:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:57,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411549653] [2021-12-14 22:41:57,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411549653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:41:57,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:41:57,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:41:57,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425310782] [2021-12-14 22:41:57,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:41:57,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:41:57,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:41:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:41:57,687 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) [2021-12-14 22:41:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:57,737 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2021-12-14 22:41:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:41:57,737 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 [2021-12-14 22:41:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:57,738 INFO L225 Difference]: With dead ends: 102 [2021-12-14 22:41:57,738 INFO L226 Difference]: Without dead ends: 101 [2021-12-14 22:41:57,739 INFO L932 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 [2021-12-14 22:41:57,752 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:57,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-14 22:41:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-12-14 22:41:57,775 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) [2021-12-14 22:41:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2021-12-14 22:41:57,775 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 16 [2021-12-14 22:41:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:57,776 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2021-12-14 22:41:57,776 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) [2021-12-14 22:41:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2021-12-14 22:41:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 22:41:57,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:57,777 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:57,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 22:41:57,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash -385899469, now seen corresponding path program 1 times [2021-12-14 22:41:57,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:57,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763002293] [2021-12-14 22:41:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:41:57,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763002293] [2021-12-14 22:41:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763002293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:41:57,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:41:57,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 22:41:57,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849582267] [2021-12-14 22:41:57,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:41:57,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:41:57,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:57,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:41:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:41:57,811 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) [2021-12-14 22:41:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:57,844 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2021-12-14 22:41:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 22:41:57,844 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 [2021-12-14 22:41:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:57,845 INFO L225 Difference]: With dead ends: 133 [2021-12-14 22:41:57,845 INFO L226 Difference]: Without dead ends: 59 [2021-12-14 22:41:57,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 22:41:57,846 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:57,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 64 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-14 22:41:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-14 22:41:57,849 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) [2021-12-14 22:41:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-12-14 22:41:57,850 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 19 [2021-12-14 22:41:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:57,850 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-12-14 22:41:57,850 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) [2021-12-14 22:41:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-12-14 22:41:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 22:41:57,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:57,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:57,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 22:41:57,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash -773947711, now seen corresponding path program 1 times [2021-12-14 22:41:57,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:57,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095235630] [2021-12-14 22:41:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:41:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:57,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:57,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095235630] [2021-12-14 22:41:57,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095235630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:57,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804060156] [2021-12-14 22:41:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:57,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:57,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:57,912 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) [2021-12-14 22:41:57,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 22:41:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:41:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:58,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:58,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804060156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:58,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:58,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-14 22:41:58,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053673912] [2021-12-14 22:41:58,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:58,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 22:41:58,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 22:41:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-14 22:41:58,138 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 22:41:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:58,207 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-12-14 22:41:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 22:41:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2021-12-14 22:41:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:58,208 INFO L225 Difference]: With dead ends: 67 [2021-12-14 22:41:58,208 INFO L226 Difference]: Without dead ends: 66 [2021-12-14 22:41:58,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-14 22:41:58,209 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:58,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 106 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-14 22:41:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-12-14 22:41:58,212 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) [2021-12-14 22:41:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-14 22:41:58,213 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 18 [2021-12-14 22:41:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:58,213 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-14 22:41:58,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 22:41:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-14 22:41:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 22:41:58,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:58,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:58,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:58,427 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 [2021-12-14 22:41:58,430 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1777424789, now seen corresponding path program 1 times [2021-12-14 22:41:58,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:58,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477321383] [2021-12-14 22:41:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:58,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:58,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:41:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:58,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477321383] [2021-12-14 22:41:58,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477321383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975291090] [2021-12-14 22:41:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:58,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:58,491 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) [2021-12-14 22:41:58,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 22:41:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:41:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:58,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:58,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975291090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:58,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:58,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-12-14 22:41:58,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207665923] [2021-12-14 22:41:58,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:58,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 22:41:58,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 22:41:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 22:41:58,631 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-12-14 22:41:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:58,701 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-14 22:41:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:41:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 [2021-12-14 22:41:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:58,703 INFO L225 Difference]: With dead ends: 65 [2021-12-14 22:41:58,704 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 22:41:58,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-14 22:41:58,705 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:58,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 102 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 22:41:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-12-14 22:41:58,708 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) [2021-12-14 22:41:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-14 22:41:58,708 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 19 [2021-12-14 22:41:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:58,709 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-14 22:41:58,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-12-14 22:41:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-14 22:41:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 22:41:58,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:58,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:58,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:58,911 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 [2021-12-14 22:41:58,912 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash -211759156, now seen corresponding path program 1 times [2021-12-14 22:41:58,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501301935] [2021-12-14 22:41:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:58,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:58,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 22:41:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:41:58,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:58,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501301935] [2021-12-14 22:41:58,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501301935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746943278] [2021-12-14 22:41:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:58,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:58,988 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) [2021-12-14 22:41:58,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 22:41:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:59,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 22:41:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:41:59,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:41:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746943278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:59,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:59,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2021-12-14 22:41:59,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395377061] [2021-12-14 22:41:59,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:59,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 22:41:59,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 22:41:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-14 22:41:59,169 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-12-14 22:41:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:59,294 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-12-14 22:41:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 22:41:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 [2021-12-14 22:41:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:59,295 INFO L225 Difference]: With dead ends: 94 [2021-12-14 22:41:59,296 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 22:41:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-12-14 22:41:59,296 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:59,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 85 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:41:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 22:41:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-12-14 22:41:59,300 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) [2021-12-14 22:41:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-12-14 22:41:59,301 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2021-12-14 22:41:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:59,301 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-12-14 22:41:59,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-12-14 22:41:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-12-14 22:41:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 22:41:59,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:59,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:59,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 22:41:59,507 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 [2021-12-14 22:41:59,508 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2025400810, now seen corresponding path program 1 times [2021-12-14 22:41:59,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:59,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915561605] [2021-12-14 22:41:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:59,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 22:41:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 22:41:59,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915561605] [2021-12-14 22:41:59,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915561605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414222498] [2021-12-14 22:41:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:59,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:59,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:59,569 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) [2021-12-14 22:41:59,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 22:41:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:41:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:41:59,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:41:59,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414222498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:59,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:59,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-12-14 22:41:59,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608143670] [2021-12-14 22:41:59,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:59,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 22:41:59,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 22:41:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 22:41:59,725 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-12-14 22:41:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:59,780 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2021-12-14 22:41:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:41:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 [2021-12-14 22:41:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:59,781 INFO L225 Difference]: With dead ends: 97 [2021-12-14 22:41:59,781 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 22:41:59,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-14 22:41:59,782 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:59,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 126 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:41:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 22:41:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-12-14 22:41:59,785 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) [2021-12-14 22:41:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-12-14 22:41:59,785 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 26 [2021-12-14 22:41:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:59,786 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-12-14 22:41:59,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-12-14 22:41:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-12-14 22:41:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 22:41:59,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:59,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:59,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:59,999 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 [2021-12-14 22:41:59,999 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash 360381511, now seen corresponding path program 1 times [2021-12-14 22:42:00,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:00,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569844044] [2021-12-14 22:42:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:00,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:42:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:42:00,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:00,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569844044] [2021-12-14 22:42:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569844044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:00,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948470513] [2021-12-14 22:42:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:00,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:00,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:00,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:00,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 22:42:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 22:42:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:42:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:42:00,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948470513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:42:00,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:42:00,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-14 22:42:00,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277500723] [2021-12-14 22:42:00,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:00,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 22:42:00,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 22:42:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-12-14 22:42:00,399 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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), 5 states have call successors, (6) [2021-12-14 22:42:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:00,632 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-12-14 22:42:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 22:42:00,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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), 5 states have call successors, (6) Word has length 29 [2021-12-14 22:42:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:00,633 INFO L225 Difference]: With dead ends: 87 [2021-12-14 22:42:00,633 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 22:42:00,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-12-14 22:42:00,634 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:00,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 145 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:42:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 22:42:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2021-12-14 22:42:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-14 22:42:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-12-14 22:42:00,638 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 29 [2021-12-14 22:42:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:00,638 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-12-14 22:42:00,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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), 5 states have call successors, (6) [2021-12-14 22:42:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-12-14 22:42:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 22:42:00,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:00,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:00,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 22:42:00,856 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash 358409096, now seen corresponding path program 1 times [2021-12-14 22:42:00,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:00,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104184745] [2021-12-14 22:42:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:00,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:42:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 22:42:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:42:00,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104184745] [2021-12-14 22:42:00,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104184745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920213788] [2021-12-14 22:42:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:00,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:00,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:00,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 22:42:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 22:42:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:42:01,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 22:42:01,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920213788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:42:01,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:42:01,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2021-12-14 22:42:01,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759209294] [2021-12-14 22:42:01,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:01,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 22:42:01,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 22:42:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-14 22:42:01,253 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 22:42:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:01,567 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2021-12-14 22:42:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 22:42:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2021-12-14 22:42:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:01,569 INFO L225 Difference]: With dead ends: 128 [2021-12-14 22:42:01,569 INFO L226 Difference]: Without dead ends: 123 [2021-12-14 22:42:01,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 22:42:01,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:01,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 104 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:42:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-14 22:42:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 69. [2021-12-14 22:42:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (12), 10 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-14 22:42:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-12-14 22:42:01,575 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 36 [2021-12-14 22:42:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:01,575 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-12-14 22:42:01,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 22:42:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-12-14 22:42:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 22:42:01,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:01,576 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:01,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:01,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:01,795 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash -421481335, now seen corresponding path program 2 times [2021-12-14 22:42:01,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:01,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599022816] [2021-12-14 22:42:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:01,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:42:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:01,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:42:01,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599022816] [2021-12-14 22:42:01,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599022816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357941104] [2021-12-14 22:42:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:42:01,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:01,952 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 22:42:01,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:42:01,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 22:42:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:42:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 22:42:02,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357941104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:42:02,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:42:02,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2021-12-14 22:42:02,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13593867] [2021-12-14 22:42:02,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:02,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 22:42:02,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 22:42:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-12-14 22:42:02,842 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (12), 12 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 22:42:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:03,365 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2021-12-14 22:42:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 22:42:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (12), 12 states have call predecessors, (12), 6 states have call successors, (12) Word has length 51 [2021-12-14 22:42:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:03,367 INFO L225 Difference]: With dead ends: 140 [2021-12-14 22:42:03,367 INFO L226 Difference]: Without dead ends: 139 [2021-12-14 22:42:03,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=2570, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 22:42:03,368 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:03,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 184 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:42:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-14 22:42:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 89. [2021-12-14 22:42:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 11 states have return successors, (20), 14 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-14 22:42:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2021-12-14 22:42:03,372 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 51 [2021-12-14 22:42:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:03,372 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2021-12-14 22:42:03,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (12), 12 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 22:42:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2021-12-14 22:42:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 22:42:03,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:03,374 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:03,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:03,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:03,580 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1225939680, now seen corresponding path program 2 times [2021-12-14 22:42:03,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:03,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552180012] [2021-12-14 22:42:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:03,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:42:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 22:42:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:03,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 22:42:03,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552180012] [2021-12-14 22:42:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552180012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883420449] [2021-12-14 22:42:03,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:42:03,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:03,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:03,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 22:42:03,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:42:03,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 22:42:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 22:42:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 22:42:03,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883420449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:42:03,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:42:03,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-14 22:42:03,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392063247] [2021-12-14 22:42:03,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:03,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 22:42:03,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 22:42:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-12-14 22:42:04,003 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-14 22:42:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:04,191 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2021-12-14 22:42:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 22:42:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 47 [2021-12-14 22:42:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:04,192 INFO L225 Difference]: With dead ends: 110 [2021-12-14 22:42:04,192 INFO L226 Difference]: Without dead ends: 105 [2021-12-14 22:42:04,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-12-14 22:42:04,193 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:04,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 183 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:42:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-14 22:42:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-12-14 22:42:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 13 states have return successors, (22), 16 states have call predecessors, (22), 5 states have call successors, (22) [2021-12-14 22:42:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-12-14 22:42:04,196 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 47 [2021-12-14 22:42:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:04,196 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-12-14 22:42:04,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-14 22:42:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-12-14 22:42:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 22:42:04,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:04,197 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 6, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:04,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:04,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 22:42:04,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1983155908, now seen corresponding path program 3 times [2021-12-14 22:42:04,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:04,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088067217] [2021-12-14 22:42:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:04,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:42:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 22:42:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 6 proven. 171 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 22:42:04,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:04,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088067217] [2021-12-14 22:42:04,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088067217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:04,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909858046] [2021-12-14 22:42:04,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:42:04,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:04,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:04,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:04,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 22:42:04,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 22:42:04,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 22:42:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 75 proven. 96 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 22:42:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 85 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-14 22:42:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909858046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:42:05,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:42:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 36 [2021-12-14 22:42:05,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798451165] [2021-12-14 22:42:05,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:05,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 22:42:05,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 22:42:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 22:42:05,520 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 37 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 34 states have internal predecessors, (106), 12 states have call successors, (18), 4 states have call predecessors, (18), 10 states have return successors, (17), 17 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-14 22:42:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:06,819 INFO L93 Difference]: Finished difference Result 208 states and 237 transitions. [2021-12-14 22:42:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-14 22:42:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 34 states have internal predecessors, (106), 12 states have call successors, (18), 4 states have call predecessors, (18), 10 states have return successors, (17), 17 states have call predecessors, (17), 11 states have call successors, (17) Word has length 81 [2021-12-14 22:42:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:06,821 INFO L225 Difference]: With dead ends: 208 [2021-12-14 22:42:06,821 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 22:42:06,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=988, Invalid=5174, Unknown=0, NotChecked=0, Total=6162 [2021-12-14 22:42:06,823 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:06,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 248 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 22:42:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 22:42:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 119. [2021-12-14 22:42:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 94 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 17 states have return successors, (26), 20 states have call predecessors, (26), 5 states have call successors, (26) [2021-12-14 22:42:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-12-14 22:42:06,830 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 81 [2021-12-14 22:42:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:06,831 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-12-14 22:42:06,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 34 states have internal predecessors, (106), 12 states have call successors, (18), 4 states have call predecessors, (18), 10 states have return successors, (17), 17 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-14 22:42:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-12-14 22:42:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-14 22:42:06,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:06,832 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:06,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:07,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 22:42:07,033 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash 274461965, now seen corresponding path program 3 times [2021-12-14 22:42:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492679665] [2021-12-14 22:42:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:07,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:42:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-14 22:42:07,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492679665] [2021-12-14 22:42:07,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492679665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847178657] [2021-12-14 22:42:07,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:42:07,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:07,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:07,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:07,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 22:42:07,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 22:42:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 22:42:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-14 22:42:07,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:18,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847178657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:18,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:42:18,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-12-14 22:42:18,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000949373] [2021-12-14 22:42:18,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:18,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 22:42:18,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:18,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 22:42:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1284, Unknown=4, NotChecked=0, Total=1482 [2021-12-14 22:42:18,576 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 30 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 8 states have return successors, (16), 16 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-14 22:42:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:19,759 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2021-12-14 22:42:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 22:42:19,759 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 30 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 8 states have return successors, (16), 16 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-12-14 22:42:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:19,760 INFO L225 Difference]: With dead ends: 166 [2021-12-14 22:42:19,760 INFO L226 Difference]: Without dead ends: 165 [2021-12-14 22:42:19,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=513, Invalid=3515, Unknown=4, NotChecked=0, Total=4032 [2021-12-14 22:42:19,762 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 191 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:19,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 386 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 22:42:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-14 22:42:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 124. [2021-12-14 22:42:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 98 states have internal predecessors, (104), 6 states have call successors, (6), 4 states have call predecessors, (6), 18 states have return successors, (28), 21 states have call predecessors, (28), 5 states have call successors, (28) [2021-12-14 22:42:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2021-12-14 22:42:19,766 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 95 [2021-12-14 22:42:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2021-12-14 22:42:19,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 30 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 8 states have return successors, (16), 16 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-14 22:42:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2021-12-14 22:42:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 22:42:19,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:19,768 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:19,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:19,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 22:42:19,986 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1943630407, now seen corresponding path program 4 times [2021-12-14 22:42:19,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:19,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655581127] [2021-12-14 22:42:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:19,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:42:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-14 22:42:20,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:20,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655581127] [2021-12-14 22:42:20,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655581127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571890538] [2021-12-14 22:42:20,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 22:42:20,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:20,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:20,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:20,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 22:42:20,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 22:42:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 22:42:20,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-14 22:42:21,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571890538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:41,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:42:41,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-12-14 22:42:41,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141734043] [2021-12-14 22:42:41,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:41,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 22:42:41,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 22:42:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1312, Unknown=8, NotChecked=0, Total=1482 [2021-12-14 22:42:41,019 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 9 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-14 22:42:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:43,422 INFO L93 Difference]: Finished difference Result 184 states and 201 transitions. [2021-12-14 22:42:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 22:42:43,422 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 9 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2021-12-14 22:42:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:43,423 INFO L225 Difference]: With dead ends: 184 [2021-12-14 22:42:43,423 INFO L226 Difference]: Without dead ends: 183 [2021-12-14 22:42:43,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=466, Invalid=3948, Unknown=8, NotChecked=0, Total=4422 [2021-12-14 22:42:43,424 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 146 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:43,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 516 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 22:42:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-14 22:42:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-12-14 22:42:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 102 states have internal predecessors, (108), 6 states have call successors, (6), 4 states have call predecessors, (6), 19 states have return successors, (30), 22 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-14 22:42:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-12-14 22:42:43,429 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 106 [2021-12-14 22:42:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:43,429 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-12-14 22:42:43,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 9 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-14 22:42:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-12-14 22:42:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-14 22:42:43,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:43,430 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:43,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 22:42:43,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 22:42:43,643 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1337179471, now seen corresponding path program 5 times [2021-12-14 22:42:43,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486806019] [2021-12-14 22:42:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:43,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:43,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 22:42:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:43,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:43,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:43,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-14 22:42:44,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486806019] [2021-12-14 22:42:44,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486806019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696074300] [2021-12-14 22:42:44,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 22:42:44,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:44,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:44,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:44,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 22:42:44,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-14 22:42:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:44,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 22:42:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-14 22:42:45,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:42:48,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696074300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:48,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:42:48,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-12-14 22:42:48,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087783695] [2021-12-14 22:42:48,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:42:48,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 22:42:48,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:42:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 22:42:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 22:42:48,129 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 37 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 22:42:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:42:50,736 INFO L93 Difference]: Finished difference Result 202 states and 221 transitions. [2021-12-14 22:42:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-14 22:42:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 117 [2021-12-14 22:42:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:42:50,738 INFO L225 Difference]: With dead ends: 202 [2021-12-14 22:42:50,738 INFO L226 Difference]: Without dead ends: 201 [2021-12-14 22:42:50,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 119 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=402, Invalid=4568, Unknown=0, NotChecked=0, Total=4970 [2021-12-14 22:42:50,740 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 161 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:42:50,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 524 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 22:42:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-14 22:42:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 134. [2021-12-14 22:42:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 106 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 20 states have return successors, (32), 23 states have call predecessors, (32), 5 states have call successors, (32) [2021-12-14 22:42:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2021-12-14 22:42:50,748 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 117 [2021-12-14 22:42:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:42:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2021-12-14 22:42:50,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 22:42:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2021-12-14 22:42:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-14 22:42:50,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:42:50,749 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:42:50,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-14 22:42:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 22:42:50,963 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:42:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:42:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 777113877, now seen corresponding path program 6 times [2021-12-14 22:42:50,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:42:50,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043634904] [2021-12-14 22:42:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:42:50,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:42:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 22:42:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:42:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:42:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-12-14 22:42:51,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:42:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043634904] [2021-12-14 22:42:51,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043634904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:42:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027579834] [2021-12-14 22:42:51,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 22:42:51,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:42:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:42:51,977 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:42:51,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 22:42:52,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-14 22:42:52,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:42:52,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 22:42:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:42:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-12-14 22:42:53,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:43:07,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027579834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:43:07,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:43:07,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-12-14 22:43:07,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240388751] [2021-12-14 22:43:07,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:43:07,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-14 22:43:07,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:43:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-14 22:43:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1784, Unknown=4, NotChecked=0, Total=1980 [2021-12-14 22:43:07,807 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 4 states have call successors, (5), 2 states have call predecessors, (5), 11 states have return successors, (22), 22 states have call predecessors, (22), 3 states have call successors, (22)